Subject: Satellite Monitoring 1/13
The following is a series of files written by Pat Gowen, G3IOR, intended to
be uploaded by sysops of F6FBB packet bulletin boards into the
"Characteristiques" portion of the BBS's satellite-tracking software.
These files provide the user with essential how-to-use data covering most
of the popular amateur radio spacecraft in use today.
21087.SAT
CHARACTERISTICS of AMSAT-OSCAR 21 (AO-21 & RS-14) NASA Cat.No: 21087
Both the RM-1 and RM-2 analogue (SSB & CW) transponders of RS-14 alias
OSCAR-21 have extremely sensitive analoge receivers, and even one watt
eirp of 70cm CW can be heard well on the 2m downlink, which is very
strong.
FREQUENCY and MODE LISTING for RS-14/OSCAR-21:
Beacon 145.822 MHz (CW)
Beacon 145.952 MHz (BPSK/FM)
Beacon 145.983 MHz (BPSK/SSB)
Mode B Uplink 1 435.022 - 435.102 MHz (SSB,CW)
Mode B Downlink 1 145.852 - 145.932 MHz (SSB,CW,inverting)
RUDAK 2 Uplink 1 435.016 MHz (AFSK/FM)
RUDAK 2 Uplink 2 435.155 MHz (BPSK/FM)
RUDAK 2 Uplink 3 435.193 MHz (BPSK/FM)
RUDAK 2 Uplink 4 435.041 MHz (Various modes)
RUDAK 2 Downlink 145.983 MHz (Various modes)
Beacon 145.948 MHz (CW)
Beacon 145.838 MHz (BPSK/FM)
Beacon 145.800 MHz (BPSK/FM)
Mode B Uplink 2 435.043 - 435.123 MHz (SSB,CW)
Mode B Downlink 2 145.866 - 145.946 MHz (SSB,CW,inverting)
RS-14 was launched piggy-back onboard the USSR geological research
satellite on 29 January 1990 from the North Cosmodrome at Plesetsk into a
slightly elliptical quasi-polar orbit with an inclination of 83 degrees, a
1000km apogee and 105 minute period.The satellite possesses a telemetry
system, command link equipment, transponders and power supply, thermal
control, and amateur linear and digital transponders, telemetry system,
command link equipment and power supply, which are a combined project of
the USSR (transponders, structure etc) and AMSAT-DL groups (RUDAK and
ancillary equipment). The RUDAK is an advanced system providing a host of
digital modes.
The main satellite attitude control is maintained by the earth's gravity
field by gravity gradient control by means of a 9 meter boom pointing away
from earth. It has a planned service lifetime of 3 years
Radio-M1/Rudak-2 System specifications
--------------------------------------
Two sets of the equipment are installed aboard the satellite, a primary
mode 'B' linear transponder RM-1, RUDAK-2 with subsystems, and a secondary
(reserve) mode 'B' linear transponder RM-2 with subsystems.
Beacons and telemetry RM-1 system:
CW telemetry 8 channels 145.822 MHz 0.2 Watts
Digital telemetry 30 channels 145.952 MHz 0.4 Watts
1100 bps,BPSK/FM, deviation 2kHz
Digital telemetry Rudak-2 145.983 MHz 3.0 Watts
BPSK 1200 bps AX.25 (like FO-20)
Beacons and telemetry RM-2 system:
CW telemetry 8 channels 145.948 MHz 0.2 Watts
Digital telemetry 30 channels 145.838 MHz 0.4 Watts
1100 bps,BPSK/FM, deviation 2kHz
Digital BPSK/FM, deviation 2kHz
Transponders RM-1
Linear transponder: inversely heterodyned translator
Uplink passband 435.102 to 435.022 MHz
Downlink passband 145.852 to 145.932 MHz
Transmitter output max 10 Watts
Bandwith (3db) 80 kHz
MAXIMUM uplink EIRP required about 100 Watts (10w will do!)
Digital transponder Rudak-2: digipeater and store & forward packet
communication (AX.25), telecommunications experiment with digital signal
processing up to nearly 20 kHz, 1 MByte RAM discphase-M.
RX-2 435.155 MHz (AFC) 2400 bps,BPSK, Biphase-S
RX-3a 435.193 MHz (AFC) 4800 bps,RSM
RX-3b 435.193 MHz (AFC) 9600 bps,RSM
RX-4 435.041 MHz (digital AFC) RX for RTX-DSP
Downlink frequency: 145.983 MHz 3 watts (very strong!).
The downlink can be switched to the following operating modes:
Mode 1: 1200 bps, BPSK, NRZI,(NRZ-S) (like FO-20)
Mode 2: 400 bps, BPSK, Biphase-S (Oscar-13 beacon)
Mode 3: 2400 bps, BPSK, Biphase-S
Mode 4: 4800 bps, RSM, NRZIC (Biphase-M) (like 4800 bps uplink)
Mode 5: 9600 bps, RSM, NRZI (NRZ-S)+Scrambler (like 9600 bps uplink)
Mode 6: CW keying (only for special events)
Mode 7: FSK (F1 or F2B),e.g. RTTY, SSTV, FAX, etc. (for special events)
Mode 8: FM modulated by D/A signals from DSP-RISC processor (speech)
Transponder RM-2 system:
Linear transponder: inversely heterodyned translator
Uplink passband 435.123 to 435.043 MHz
Downlink frequencies 145.866 to 145.946 MHz
Transmitter output max 10 Watt max.
Bandwith (3db) 80 kHz
Uplink EIRP required about 100 Watts
Antennas: 435 MHz receiving antenna (shared by analog and digital modes)
Helix +3 db max RHCP. 145 MHz transmitting antenna: Half wave dipole.
Power supply (up to 100w) comes from the main GEOS satellite power supply
system. System RM-1 consumption 47 Watts. System RM-2 consumption 40 Watts
Pat Gowen, G3IOR 7 May 1992
19216.SAT
CHARACTERISTICS of OSCAR-13
This second functioning Phase III-B satellite was launched by ESA's
ARIANE-4 from French Guiana on 15 June 1988 into a highly elliptical
'Molniya' type orbit with a 36,000 Kn Apogee and a 2546 Km Perigee. Due to
Lunar and Solar effects the orbit is becoming more elliptical, and the
lowering perigee atmospheric frictional drag is set to shorten the life of
this spacecraft. The period is some 11 hours. Four transponders are carried
that are placed on according to ground command control.
Frequencies for AMSAT-OSCAR 13 (AO-13)
General Beacon 145.812 MHz (PSK,CW,RTTY)
Engineering Beacon 145.985 MHz (PSK,CW,RTTY)
Mode B Uplink 435.423 - 435.573 MHz (SSB,CW)
Mode B Downlink 145.825 - 145.975 MHz (SSB,CW,inverting)
General Beacon 435.651 MHz (PSK,RTTY)
Engineering Beacon 435.677 MHz (PSK,RTTY)
Mode L Uplink 1269.351 - 1269.641 MHz (SSB,CW)
Mode L Downlink 435.715 - 436.005 MHz (SSB,CW,inverting)
Mode J Uplink 144.423 - 144.473 MHz (SSB,CW)
Mode J Downlink 435.940 - 435.990 MHz (SSB,CW,inverting)
Beacon 2400.325 MHz (PSK,RTTY)
Beacon 2400.664 MHz (PSK,RTTY)
Mode S Uplink 435.603 - 435.639 MHz (SSB,CW,FM)
Mode S Downlink 2400.711 - 2400.747 MHz (SSB,CW,FM)
RUDAK Uplink 1269.710 MHz (Inoperative)
RUDAK Downlink 435.677 MHz (Inoperative)
The 145.812 MHz beacon sends CW telemetry at the hour and half hour,
RTTY at the quarter and three-quarter hours, and PSK all the rest of the
time. Updated information on mode switching and status is supplied by this
beacon. The 145.985 MHz beacon is much stronger, and is mainly used in
controlled magnotorquing by the command stations DB2OS, G3RUH and VK6AGR.
The Mode 'B' uplink requirements for A-O-13 are accomplished by using 25
- 50 watts of CW or LSB from any conventional 70cm TX to a 12 X/Y Yagi
or a 10 turn RHCP Helix with azimuth/elevation pointing. The dowlink
requires an azimuth/elevation pointing 10 element RHCP Yagi or 8 turn
Helix to a low noise pre-amplifier at the antenna feeding any USB 2m RX.
Mode 'J' requires exactly the same antennas as for Mode 'B', with
reversed transmitters and receivers, with a Low Noise pre-amplifier on the
70 cm receiver.
'L' mode needs a pair of 23cm 20 element Quad Loop Yagis fed with at
least 100 watts of CW or SSB. The downlink needs are as for Mode 'J'.
'S' Mode needs some 50 watts of 435 MHz CW or SSB from the same 70cm
antenna, and an azimuth/elevation controlled 20 turn Helix for 2400 MHz
with a good low noise front end. A 13cm to 2m or 13cm to 10m converter
may be used feeding the main station 2 or 10m receiver.
Pat Gowen, G3IOR 25 April 1992
14781.SAT
CHARACTERISTICS of OSCAR-11 (U-O-11) (UoSAT-2)
This gravity gradient stabilized satellite was designed and built by the
University of Surrey AMSAT Group and launched from the USA into a circular
700 Km high Quasi-Polar 98 minute period orbit.
OSCAR-11 has no transponders, but transmits valuable scientific
telemetry including 'WOD' (Whole Orbit Data) of many of it's channels.
These include numerous temperatures, magnetometer readings, radiation and
micro-meteorite impact data. It also transmits regular bulletins of general
amateur radio and space interest. It has played a useful function in
providing tracking data and Doppler positioning to numerous scientific
expeditions inluding the joint Canadian Russian trans-polar ski-trek. A
voice encoder also provides spoken telemetry and uplinked messages.
The transmissions are easily received using a simple crossed dipole
(turnstile) or a small preferably circularly polarized Yagi to any
conventional 2m FM receiver without modification. A CCD Camera provides
earth pictures
Demodulators and computer Programs are available from AMSAT-UK for
directly translating the telemetry, WOD, pictures, bulletins etc. directly
from the audio socket of the receiver or via taped recordings to a
computer.
FREQUENCIES for UoSAT-OSCAR-11
Beacon 145.826 MHz (AFSK/FM)
Beacon 435.025 MHz (AFSK/FM)
Beacon 2401.500 MHz (AFSK/FM)
QTH for AMSAT-UK: Ron Broadbent, G3AAJ,
Secretary AMSAT-UK,
94 Herongate Road,
Wanstead Park,
London
E12 5EQ
United Kingdom.
Reports of OSCAR-11 and it's educational use deployment are welcomed by:
UoSAT Spacecraft Laboratory,
School of Electronic and Electrical Engineering,
University of Surrey,
Guildford,
Surrey,
GU12 5XH
United Kingdom.
Pat Gowen, G3IOR @ GB7VLS
21578.SAT
Characteristics of SARA NASA Cat.No. 21578
SARA is an acronym of 'Satellite Amateur de Radio-Astronomie' (Amateur
Radio Astronomy Satellite), a very small 19 Kg satellite constructed by
radio amateur engineers of ESIEESPACE near Paris. SARA was launched by
ARIANE with OSCAR-22 from ESA in Kourou into a solar-synchronous 100 minute
period orbit that passes over earth locations between 1000 and 1400 UTC and
again between 2200 and 0200 UTC local time. SARA's callsign is transmitted
in ASCII in the first line as FX0SAT, as is the full QTH of ESIEESPACE.
SARA's function is the study of eight channels of radio emissions of
the planet Jupiter between 2 and 15 MHz, which are unable to penetrate
earth's ionosphere. It transmits the data as 300 bauds digital temetry on
145.955 MHz FM +/- 5 KHz deviation, which is receivable on any 2m FM
receiver, preferably with a pre-amplifier and good cross polarized azimuth-
elevation trained Yagi, as the signal is not very strong.
A 500 Hz sub-carrier contains the battery voltage information, defined
by V (in Volts) = 0.0148 x F, where F is the tone frequency received. A 220
Hz sub-carrier gives the structure temperature by T (in Deg.C) = 0.714 x (F
- 164.2) where F is the tone frequency received. The 50 Hz bandwidth audio
filter circuit below from Hilburn and Johnson's Manual of Active Filter
Design will function between the receiver audio output and a frequency
meter with R2 set at 2K for 210 HZ and at 350 Ohms for 500 Hz
! ! C1 .03uF
,------! !-------------------------,
! ! ! !
! R3 !
! 330K !
! ,--------/\/\/\/--------o
! C2 ! !
! .03uF ! o +V !
! ! ! ! 2 ,\ ! !
IN o--/\/\/\/-----o---! !----o---!- \ ! 7 !
R1 16K ! ! ! ! \! !
! ! \ !
\ ! 741 >----------o----> OUT
/ R2 ! / 6
,----> \ 2K 3 ! /
! / ,--!+ / ! 4
! \ ! ! / !
! ! ! ` !
`------o-----------' o -V V= +/- 5 to 15 V
!
-----
--- Audio Filter for SARA Telemetry Decoding.
-
Reception reports are welcomed and will be QSL'd, and further
information is available from BELAMSAT, ON1KHP, Thier des Critchions 2,
4032 CHENEE, Belgium, who also publish 'BELAMSAT SATELLITE NEWS' magazine.
Pat Gowen, G3IOR 27 April 1992
20439.SAT
INFORMATION ON PACSAT, OSCAR-16, A-O-16, Indicator PACSAT-12.
This satellite is one of the family of the MICROSATS launched by ESA
from Kourou with the SPOT-II satellite in January 1990. Antennas as for
those used for UO-14 (UoSAT-OSCAR-22) are recommended with a similar 145
MHz TX. The 435 MHz SSB receiver needs to be equipped with AFC.
It runs a BBS, transmits 1200 bps AX.25 PSK on a frequency of 437.025
MHz, and has uplinks at 145.900, 145.920, 145.940 and 145.960 MHz. A
special PSK modem TNC adaptation is required. As for all these microsats,
antennas as used and given for UO-14 are recommended. The 145 MHz FM Tx is
as for UO-14, with varactor drive desirable. 100 watts of FM is recommended
as an uplink. e.g. 10w to a 10 dB gain preferably circularly polarised az-
el adjustable 2m antenna. A Helix 10T or similar gain circularly polarised
10 - 14 dB gain 435 MHz receiving antenna is recommended.
The 435 MHz SSB Rx needs to be equipped with AFC. Use a G3RUH FUJI BPSK
modem and a modified TNC with the original modem disconnected. The software
and micro may be as for UO-14. For the AO-16 2400 MHz downlink only, a
simple helix can be used going to a 13cm/2m or 10m converter, with the same
modem and TNC as used for 435 MHz reception.
PC Software such as the PG.EXE programmes is needed (for transmission
and reception), or PB.EXE for the numerous files reception. The server line
are needed to access is:
bbscall pacsat-11
Change your normal TNC parameters to: FRACK 6
MAXF 1
Telemetry aquisition and display of A-O-16, 18, 19 and U-O-22 is
performed by 'DTLM.EXE' written by Jeff Ward, G0/K8KA, available from
AMSAT-UK, London, E12 5EQ.
Pat Gowen, G3IOR 1 May 1992
21575.SAT
CHARACTERISTICS of OSCAR-22 (UoSAT-F) (UoSAT-5) (U-O-22)
This gravity gradient stabilized satellite is yet another from the
University of Surrey AMSAT Group's stable. It was launched with SARA-OSCAR-
23 into a 780km high 98 degree inclination orbit by ESA on ARIANE. It is
fundamentally similar to UoSAT-14, but has a greater memory capacity (512
KBytes providing 800 messages) and two seperate uplink frequencies. Please
see the details for OSCAR-14 (U-O-14) for the transmit, receive, antenna
and ancillary equipment needs for this satellite, which like UoSAT-14 also
sends AX.25 data at 9600 bps on the downlink. Similar programs may be used.
UO-22 also carries a camera with a 110 degree wide-angle lens which
gives a broad field of view, this giving superb earth pictures broadcast
using the PACSAT protocol. Images represent an earth coverage of 1600 x
1800 km. Each image is 578 x 576 pixels, giving a ground resolution of some
2 Km. (A pixel is 8 bits, giving a black and white image with 256 grey
levels).
Telemetry aquisition and display of A-O-16, 18, 19 and U-O-22 is
performed by 'DTLM.EXE' written by Jeff Ward, G0/K8KA, available from
AMSAT-UK, London, E12 5EQ.
UoSAT-F FREQUENCIES:
Single Channel Downlink on 435.120 MHz, 9600 bps FSK, (1200 bps AFSK
backup) with commandable 5 or 2 watts of power.
Uplinks: 145.900 and 145.975 MHz. (Geoff Ward, G0/K8KA, controller at the
Unversity of Surrey recommends broadcast requests and other PB operations
on 145.900 MHz whilst uploaders use 145.975 MHz). Uplink is 9600 bps FSK
(1200 bps AFSK backup).
N.B.: Note that this satellite is highly popular for forwarding long
distance packet radio messages, and is hence in high use with access
difficulties often evidenced due to this factor.
Casual listeners using a normal 435 MHz receiver will not hear tonal
frequencies as such, but may notice a slight audio content with elevated
'S' meter readings.
Pat Gowen, G3IOR 1 May 1992
20441.SAT
CHARACTERISTICS of WEBERSAT-OSCAR 18 (WO-18)
This satellite is one of the family of the MICROSATS launched by ESA
from Kourou with the SPOT-II satellite in January 1990. Antennas as for
those used for UO-14 (UoSAT-OSCAR-22) are recommended with a similar 145
MHz TX preferably with Varactor Drive. AFC is not required as the modem
tracks the Doppler shift up and down by 'clicks'.
WEBERSAT has a Impact Detector, sends picture images, and Whole Orbit
Data (WOD) thus providing a high scientific research user basis.
To demodulate you will need a BPSK Modem and a modified TNC with the
original Modem disconnected. The software and micro requirements are the
same as those recommended for U-O-14. Modems recommended by G4WFQ for 1200
bps BPSK are G3RUH JAS-1, Pac-Comm PSK-1, TAPR PSK Modem, LL Grace DSP-12,
and DSP-2232. Modems suitable for 9600 bps FSK are G3RUH, Pac-Comm NB-96,
Kantronics DE9600, Tasco TMB-965, K9NG, Gracelis PackeTwin, LL Grace DSP-12
and DSP-2232.
Software requirements for WEBERSAT: Capture RAW KISS data with any dumb
terminal program that stores frames to disc, without stripping 8th bit,
i.e. TLMDC-11, YAPP-B, etc.
'WEBERWARE 1.0', available from AMSAT-UK, London, E12 5EQ, will process
and display the camera picture images.
The following is a series of files written by Pat Gowen, G3IOR, intended to
be uploaded by sysops of F6FBB packet bulletin boards into the
"Characteristiques" portion of the BBS's satellite-tracking software.
These files provide the user with essential how-to-use data covering most
of the popular amateur radio spacecraft in use today.
21087.SAT
CHARACTERISTICS of AMSAT-OSCAR 21 (AO-21 & RS-14) NASA Cat.No: 21087
Both the RM-1 and RM-2 analogue (SSB & CW) transponders of RS-14 alias
OSCAR-21 have extremely sensitive analoge receivers, and even one watt
eirp of 70cm CW can be heard well on the 2m downlink, which is very
strong.
FREQUENCY and MODE LISTING for RS-14/OSCAR-21:
Beacon 145.822 MHz (CW)
Beacon 145.952 MHz (BPSK/FM)
Beacon 145.983 MHz (BPSK/SSB)
Mode B Uplink 1 435.022 - 435.102 MHz (SSB,CW)
Mode B Downlink 1 145.852 - 145.932 MHz (SSB,CW,inverting)
RUDAK 2 Uplink 1 435.016 MHz (AFSK/FM)
RUDAK 2 Uplink 2 435.155 MHz (BPSK/FM)
RUDAK 2 Uplink 3 435.193 MHz (BPSK/FM)
RUDAK 2 Uplink 4 435.041 MHz (Various modes)
RUDAK 2 Downlink 145.983 MHz (Various modes)
Beacon 145.948 MHz (CW)
Beacon 145.838 MHz (BPSK/FM)
Beacon 145.800 MHz (BPSK/FM)
Mode B Uplink 2 435.043 - 435.123 MHz (SSB,CW)
Mode B Downlink 2 145.866 - 145.946 MHz (SSB,CW,inverting)
RS-14 was launched piggy-back onboard the USSR geological research
satellite on 29 January 1990 from the North Cosmodrome at Plesetsk into a
slightly elliptical quasi-polar orbit with an inclination of 83 degrees, a
1000km apogee and 105 minute period.The satellite possesses a telemetry
system, command link equipment, transponders and power supply, thermal
control, and amateur linear and digital transponders, telemetry system,
command link equipment and power supply, which are a combined project of
the USSR (transponders, structure etc) and AMSAT-DL groups (RUDAK and
ancillary equipment). The RUDAK is an advanced system providing a host of
digital modes.
The main satellite attitude control is maintained by the earth's gravity
field by gravity gradient control by means of a 9 meter boom pointing away
from earth. It has a planned service lifetime of 3 years
Radio-M1/Rudak-2 System specifications
--------------------------------------
Two sets of the equipment are installed aboard the satellite, a primary
mode 'B' linear transponder RM-1, RUDAK-2 with subsystems, and a secondary
(reserve) mode 'B' linear transponder RM-2 with subsystems.
Beacons and telemetry RM-1 system:
CW telemetry 8 channels 145.822 MHz 0.2 Watts
Digital telemetry 30 channels 145.952 MHz 0.4 Watts
1100 bps,BPSK/FM, deviation 2kHz
Digital telemetry Rudak-2 145.983 MHz 3.0 Watts
BPSK 1200 bps AX.25 (like FO-20)
Beacons and telemetry RM-2 system:
CW telemetry 8 channels 145.948 MHz 0.2 Watts
Digital telemetry 30 channels 145.838 MHz 0.4 Watts
1100 bps,BPSK/FM, deviation 2kHz
Digital BPSK/FM, deviation 2kHz
Transponders RM-1
Linear transponder: inversely heterodyned translator
Uplink passband 435.102 to 435.022 MHz
Downlink passband 145.852 to 145.932 MHz
Transmitter output max 10 Watts
Bandwith (3db) 80 kHz
MAXIMUM uplink EIRP required about 100 Watts (10w will do!)
Digital transponder Rudak-2: digipeater and store & forward packet
communication (AX.25), telecommunications experiment with digital signal
processing up to nearly 20 kHz, 1 MByte RAM discphase-M.
RX-2 435.155 MHz (AFC) 2400 bps,BPSK, Biphase-S
RX-3a 435.193 MHz (AFC) 4800 bps,RSM
RX-3b 435.193 MHz (AFC) 9600 bps,RSM
RX-4 435.041 MHz (digital AFC) RX for RTX-DSP
Downlink frequency: 145.983 MHz 3 watts (very strong!).
The downlink can be switched to the following operating modes:
Mode 1: 1200 bps, BPSK, NRZI,(NRZ-S) (like FO-20)
Mode 2: 400 bps, BPSK, Biphase-S (Oscar-13 beacon)
Mode 3: 2400 bps, BPSK, Biphase-S
Mode 4: 4800 bps, RSM, NRZIC (Biphase-M) (like 4800 bps uplink)
Mode 5: 9600 bps, RSM, NRZI (NRZ-S)+Scrambler (like 9600 bps uplink)
Mode 6: CW keying (only for special events)
Mode 7: FSK (F1 or F2B),e.g. RTTY, SSTV, FAX, etc. (for special events)
Mode 8: FM modulated by D/A signals from DSP-RISC processor (speech)
Transponder RM-2 system:
Linear transponder: inversely heterodyned translator
Uplink passband 435.123 to 435.043 MHz
Downlink frequencies 145.866 to 145.946 MHz
Transmitter output max 10 Watt max.
Bandwith (3db) 80 kHz
Uplink EIRP required about 100 Watts
Antennas: 435 MHz receiving antenna (shared by analog and digital modes)
Helix +3 db max RHCP. 145 MHz transmitting antenna: Half wave dipole.
Power supply (up to 100w) comes from the main GEOS satellite power supply
system. System RM-1 consumption 47 Watts. System RM-2 consumption 40 Watts
Pat Gowen, G3IOR 7 May 1992
19216.SAT
CHARACTERISTICS of OSCAR-13
This second functioning Phase III-B satellite was launched by ESA's
ARIANE-4 from French Guiana on 15 June 1988 into a highly elliptical
'Molniya' type orbit with a 36,000 Kn Apogee and a 2546 Km Perigee. Due to
Lunar and Solar effects the orbit is becoming more elliptical, and the
lowering perigee atmospheric frictional drag is set to shorten the life of
this spacecraft. The period is some 11 hours. Four transponders are carried
that are placed on according to ground command control.
Frequencies for AMSAT-OSCAR 13 (AO-13)
General Beacon 145.812 MHz (PSK,CW,RTTY)
Engineering Beacon 145.985 MHz (PSK,CW,RTTY)
Mode B Uplink 435.423 - 435.573 MHz (SSB,CW)
Mode B Downlink 145.825 - 145.975 MHz (SSB,CW,inverting)
General Beacon 435.651 MHz (PSK,RTTY)
Engineering Beacon 435.677 MHz (PSK,RTTY)
Mode L Uplink 1269.351 - 1269.641 MHz (SSB,CW)
Mode L Downlink 435.715 - 436.005 MHz (SSB,CW,inverting)
Mode J Uplink 144.423 - 144.473 MHz (SSB,CW)
Mode J Downlink 435.940 - 435.990 MHz (SSB,CW,inverting)
Beacon 2400.325 MHz (PSK,RTTY)
Beacon 2400.664 MHz (PSK,RTTY)
Mode S Uplink 435.603 - 435.639 MHz (SSB,CW,FM)
Mode S Downlink 2400.711 - 2400.747 MHz (SSB,CW,FM)
RUDAK Uplink 1269.710 MHz (Inoperative)
RUDAK Downlink 435.677 MHz (Inoperative)
The 145.812 MHz beacon sends CW telemetry at the hour and half hour,
RTTY at the quarter and three-quarter hours, and PSK all the rest of the
time. Updated information on mode switching and status is supplied by this
beacon. The 145.985 MHz beacon is much stronger, and is mainly used in
controlled magnotorquing by the command stations DB2OS, G3RUH and VK6AGR.
The Mode 'B' uplink requirements for A-O-13 are accomplished by using 25
- 50 watts of CW or LSB from any conventional 70cm TX to a 12 X/Y Yagi
or a 10 turn RHCP Helix with azimuth/elevation pointing. The dowlink
requires an azimuth/elevation pointing 10 element RHCP Yagi or 8 turn
Helix to a low noise pre-amplifier at the antenna feeding any USB 2m RX.
Mode 'J' requires exactly the same antennas as for Mode 'B', with
reversed transmitters and receivers, with a Low Noise pre-amplifier on the
70 cm receiver.
'L' mode needs a pair of 23cm 20 element Quad Loop Yagis fed with at
least 100 watts of CW or SSB. The downlink needs are as for Mode 'J'.
'S' Mode needs some 50 watts of 435 MHz CW or SSB from the same 70cm
antenna, and an azimuth/elevation controlled 20 turn Helix for 2400 MHz
with a good low noise front end. A 13cm to 2m or 13cm to 10m converter
may be used feeding the main station 2 or 10m receiver.
Pat Gowen, G3IOR 25 April 1992
14781.SAT
CHARACTERISTICS of OSCAR-11 (U-O-11) (UoSAT-2)
This gravity gradient stabilized satellite was designed and built by the
University of Surrey AMSAT Group and launched from the USA into a circular
700 Km high Quasi-Polar 98 minute period orbit.
OSCAR-11 has no transponders, but transmits valuable scientific
telemetry including 'WOD' (Whole Orbit Data) of many of it's channels.
These include numerous temperatures, magnetometer readings, radiation and
micro-meteorite impact data. It also transmits regular bulletins of general
amateur radio and space interest. It has played a useful function in
providing tracking data and Doppler positioning to numerous scientific
expeditions inluding the joint Canadian Russian trans-polar ski-trek. A
voice encoder also provides spoken telemetry and uplinked messages.
The transmissions are easily received using a simple crossed dipole
(turnstile) or a small preferably circularly polarized Yagi to any
conventional 2m FM receiver without modification. A CCD Camera provides
earth pictures
Demodulators and computer Programs are available from AMSAT-UK for
directly translating the telemetry, WOD, pictures, bulletins etc. directly
from the audio socket of the receiver or via taped recordings to a
computer.
FREQUENCIES for UoSAT-OSCAR-11
Beacon 145.826 MHz (AFSK/FM)
Beacon 435.025 MHz (AFSK/FM)
Beacon 2401.500 MHz (AFSK/FM)
QTH for AMSAT-UK: Ron Broadbent, G3AAJ,
Secretary AMSAT-UK,
94 Herongate Road,
Wanstead Park,
London
E12 5EQ
United Kingdom.
Reports of OSCAR-11 and it's educational use deployment are welcomed by:
UoSAT Spacecraft Laboratory,
School of Electronic and Electrical Engineering,
University of Surrey,
Guildford,
Surrey,
GU12 5XH
United Kingdom.
Pat Gowen, G3IOR @ GB7VLS
21578.SAT
Characteristics of SARA NASA Cat.No. 21578
SARA is an acronym of 'Satellite Amateur de Radio-Astronomie' (Amateur
Radio Astronomy Satellite), a very small 19 Kg satellite constructed by
radio amateur engineers of ESIEESPACE near Paris. SARA was launched by
ARIANE with OSCAR-22 from ESA in Kourou into a solar-synchronous 100 minute
period orbit that passes over earth locations between 1000 and 1400 UTC and
again between 2200 and 0200 UTC local time. SARA's callsign is transmitted
in ASCII in the first line as FX0SAT, as is the full QTH of ESIEESPACE.
SARA's function is the study of eight channels of radio emissions of
the planet Jupiter between 2 and 15 MHz, which are unable to penetrate
earth's ionosphere. It transmits the data as 300 bauds digital temetry on
145.955 MHz FM +/- 5 KHz deviation, which is receivable on any 2m FM
receiver, preferably with a pre-amplifier and good cross polarized azimuth-
elevation trained Yagi, as the signal is not very strong.
A 500 Hz sub-carrier contains the battery voltage information, defined
by V (in Volts) = 0.0148 x F, where F is the tone frequency received. A 220
Hz sub-carrier gives the structure temperature by T (in Deg.C) = 0.714 x (F
- 164.2) where F is the tone frequency received. The 50 Hz bandwidth audio
filter circuit below from Hilburn and Johnson's Manual of Active Filter
Design will function between the receiver audio output and a frequency
meter with R2 set at 2K for 210 HZ and at 350 Ohms for 500 Hz
! ! C1 .03uF
,------! !-------------------------,
! ! ! !
! R3 !
! 330K !
! ,--------/\/\/\/--------o
! C2 ! !
! .03uF ! o +V !
! ! ! ! 2 ,\ ! !
IN o--/\/\/\/-----o---! !----o---!- \ ! 7 !
R1 16K ! ! ! ! \! !
! ! \ !
\ ! 741 >----------o----> OUT
/ R2 ! / 6
,----> \ 2K 3 ! /
! / ,--!+ / ! 4
! \ ! ! / !
! ! ! ` !
`------o-----------' o -V V= +/- 5 to 15 V
!
-----
--- Audio Filter for SARA Telemetry Decoding.
-
Reception reports are welcomed and will be QSL'd, and further
information is available from BELAMSAT, ON1KHP, Thier des Critchions 2,
4032 CHENEE, Belgium, who also publish 'BELAMSAT SATELLITE NEWS' magazine.
Pat Gowen, G3IOR 27 April 1992
20439.SAT
INFORMATION ON PACSAT, OSCAR-16, A-O-16, Indicator PACSAT-12.
This satellite is one of the family of the MICROSATS launched by ESA
from Kourou with the SPOT-II satellite in January 1990. Antennas as for
those used for UO-14 (UoSAT-OSCAR-22) are recommended with a similar 145
MHz TX. The 435 MHz SSB receiver needs to be equipped with AFC.
It runs a BBS, transmits 1200 bps AX.25 PSK on a frequency of 437.025
MHz, and has uplinks at 145.900, 145.920, 145.940 and 145.960 MHz. A
special PSK modem TNC adaptation is required. As for all these microsats,
antennas as used and given for UO-14 are recommended. The 145 MHz FM Tx is
as for UO-14, with varactor drive desirable. 100 watts of FM is recommended
as an uplink. e.g. 10w to a 10 dB gain preferably circularly polarised az-
el adjustable 2m antenna. A Helix 10T or similar gain circularly polarised
10 - 14 dB gain 435 MHz receiving antenna is recommended.
The 435 MHz SSB Rx needs to be equipped with AFC. Use a G3RUH FUJI BPSK
modem and a modified TNC with the original modem disconnected. The software
and micro may be as for UO-14. For the AO-16 2400 MHz downlink only, a
simple helix can be used going to a 13cm/2m or 10m converter, with the same
modem and TNC as used for 435 MHz reception.
PC Software such as the PG.EXE programmes is needed (for transmission
and reception), or PB.EXE for the numerous files reception. The server line
are needed to access is:
bbscall pacsat-11
Change your normal TNC parameters to: FRACK 6
MAXF 1
Telemetry aquisition and display of A-O-16, 18, 19 and U-O-22 is
performed by 'DTLM.EXE' written by Jeff Ward, G0/K8KA, available from
AMSAT-UK, London, E12 5EQ.
Pat Gowen, G3IOR 1 May 1992
21575.SAT
CHARACTERISTICS of OSCAR-22 (UoSAT-F) (UoSAT-5) (U-O-22)
This gravity gradient stabilized satellite is yet another from the
University of Surrey AMSAT Group's stable. It was launched with SARA-OSCAR-
23 into a 780km high 98 degree inclination orbit by ESA on ARIANE. It is
fundamentally similar to UoSAT-14, but has a greater memory capacity (512
KBytes providing 800 messages) and two seperate uplink frequencies. Please
see the details for OSCAR-14 (U-O-14) for the transmit, receive, antenna
and ancillary equipment needs for this satellite, which like UoSAT-14 also
sends AX.25 data at 9600 bps on the downlink. Similar programs may be used.
UO-22 also carries a camera with a 110 degree wide-angle lens which
gives a broad field of view, this giving superb earth pictures broadcast
using the PACSAT protocol. Images represent an earth coverage of 1600 x
1800 km. Each image is 578 x 576 pixels, giving a ground resolution of some
2 Km. (A pixel is 8 bits, giving a black and white image with 256 grey
levels).
Telemetry aquisition and display of A-O-16, 18, 19 and U-O-22 is
performed by 'DTLM.EXE' written by Jeff Ward, G0/K8KA, available from
AMSAT-UK, London, E12 5EQ.
UoSAT-F FREQUENCIES:
Single Channel Downlink on 435.120 MHz, 9600 bps FSK, (1200 bps AFSK
backup) with commandable 5 or 2 watts of power.
Uplinks: 145.900 and 145.975 MHz. (Geoff Ward, G0/K8KA, controller at the
Unversity of Surrey recommends broadcast requests and other PB operations
on 145.900 MHz whilst uploaders use 145.975 MHz). Uplink is 9600 bps FSK
(1200 bps AFSK backup).
N.B.: Note that this satellite is highly popular for forwarding long
distance packet radio messages, and is hence in high use with access
difficulties often evidenced due to this factor.
Casual listeners using a normal 435 MHz receiver will not hear tonal
frequencies as such, but may notice a slight audio content with elevated
'S' meter readings.
Pat Gowen, G3IOR 1 May 1992
20441.SAT
CHARACTERISTICS of WEBERSAT-OSCAR 18 (WO-18)
This satellite is one of the family of the MICROSATS launched by ESA
from Kourou with the SPOT-II satellite in January 1990. Antennas as for
those used for UO-14 (UoSAT-OSCAR-22) are recommended with a similar 145
MHz TX preferably with Varactor Drive. AFC is not required as the modem
tracks the Doppler shift up and down by 'clicks'.
WEBERSAT has a Impact Detector, sends picture images, and Whole Orbit
Data (WOD) thus providing a high scientific research user basis.
To demodulate you will need a BPSK Modem and a modified TNC with the
original Modem disconnected. The software and micro requirements are the
same as those recommended for U-O-14. Modems recommended by G4WFQ for 1200
bps BPSK are G3RUH JAS-1, Pac-Comm PSK-1, TAPR PSK Modem, LL Grace DSP-12,
and DSP-2232. Modems suitable for 9600 bps FSK are G3RUH, Pac-Comm NB-96,
Kantronics DE9600, Tasco TMB-965, K9NG, Gracelis PackeTwin, LL Grace DSP-12
and DSP-2232.
Software requirements for WEBERSAT: Capture RAW KISS data with any dumb
terminal program that stores frames to disc, without stripping 8th bit,
i.e. TLMDC-11, YAPP-B, etc.
'WEBERWARE 1.0', available from AMSAT-UK, London, E12 5EQ, will process
and display the camera picture images.
Telemetry aquisition and display of A-O-16, 18, 19 and U-O-22 is
performed by 'DTLM.EXE' written by Jeff Ward, G0/K8KA, available from
AMSAT-UK, London, E12 5EQ.
FREQUENCIES used for WEBERSAT-OSCAR 18 (WO-18)
Downlink (PSK) 437.0751 MHz (BPSK/SSB)
Downlink (RC) 437.1020 MHz (BPSK/SSB)
Uplink ATV (NTSC) 1265.000 MHz (TV/AM)
Pat Gowen, G3IOR 1 May 1992
20437.SAT
CHARACTERISTICS of OSCAR-14 (Uo-14 or UoSAT-D)
This satellite, also known as UoSAT-D, was designed and built by the
UoSAT University of Surrey AMSAT Group. It was launched with the microsat
cluster with the ARIANE SPOT-II launch from Kourou in January 1990.
It runs on 9600 bauds which requires a G3RUH (or K9NG) modem for this
very high baud rate speed, and a modified TNC with the original modem
disconnected. (The TNC-320 and PK-232 are not recommended). An IBM micro
with PG software or an ATARI with PE1HCL.NET software running completes the
needs for 9600 bauds operation.
For the 145 MHz FM uplink use a 5 element cross or circularly polarized
Yagi from a 25 watt transmitter with direct modulation of the varactor. The
435 MHz FM receiver must possess 20 KHz bandwidth and have output taken
direct from the discriminator. The receive antenna ideally needs to be a
435 MHz 12 X/Y or multibeam. Both antennas require azimuth-elevation track
pointing.
FREQUENCIES and MODES for UoSAT-OSCAR 14 (UO-14)
Uplink 145.975 MHz (FSK/FM) 9600 bps PSK AX.25.
Downlink 1 435.070 MHz (FSK/FM) .
Downlink 2 435.070 MHz (AFSK/FM) 1200 bps AFSK etc.
NOTE: At this point in time UoSAT-D is in use for third world support VITA
and SATELIFE mission medical communications on specially allocated
frequencies just outside our 435 and 145 MHz amateur bands. The heavier
load of amateur traffic is now provided exclusively on UO-22 which has a
greater memory capacity and two uplink frequencies.
Pat Gowen, G3IOR 27 April 1992
21089.SAT
CHARACTERISTICS of RS-12/13
RS-12 and 13 were launched at 0236 UTC on February 5 1991 into a 1019 Km
apogee 961 Km perigee 83 degree inclination 104.87 minute period orbit.
They are a pair of seperate transponders matched to a major scientific
satellite, obtaining their power supplies from that source. The
transponders are basically alike, and have similar modes to their
predecessors RS-10 and 11, to which please refer for the main
characteristics and full functioning information.
Whilst RS-10 and 11 are maintained in mode 'A' (145/29 MHz)
transponder operation, RS-12 is currently activated in 'K' mode, 21 MHz
uplink, 29 MHz downlink. RS-13 is presently kept on standby. From time to
time 'T' mode with the 21 MHz uplink and 145 MHz downlink, often in
tandem with 'K' ('KT' mode) will come on. Later operation may revert to 'A'
or 'KA' mode.
Mode 'K' is a fascinating mode which permitted the first mutual
sub-horizon and antipodal satellite QSO between G3IOR and ZL1APM. It
can provide fascinating ionospheric findings and propogational
information according to satellite signal path insolation.
Low angle high gain beams are neither vital for the strong 29 MHz
downlink nor for the 21 MHz uplink, although they may help to reduce the
QRM from FM stations invading the satellite band. Simple antennas such as
ground planes, long wires and dipoles with some 50 watts of 21 MHz SSB or
CW can produce sub-horizon access permitting DX QSO's when neither 21 nor
29 MHz are open for communication. As most amateurs have HF transceivers
available, this mode permits large numbers of the rarer DXCC countries that
to be active via satellite that are not equipped for VHF and UHF.
Frequencies for RADIO SPUTNIK (RS-12)
Beacon/ROBOT 29.408 MHz (CW)
Beacon/ROBOT 29.454 MHz (CW)
Mode A Uplink 145.910 - 145.950 MHz (SSB,CW)
Mode A Downlink 29.411 - 29.451 MHz (SSB,CW)
ROBOT A Uplink 145.831 MHz (CW)
ROBOT A Downlink 29.408 or 29.454 MHz (CW)
Beacon/ROBOT 29.408 MHz (C)
Beacon/ROBOT 29.454 MHz (CW)
Mod K Uplink 21.210 - 21.250 MHz (SSB,CW)
Mde K Downlink 29.411 - 29.451 MHz (SSB,CW)
OBOT K Uplink 21.130 MHz (CW)
ROBOT K Downlink 29.408 or 29.454 MHz (CW)
Beacon/ROBOT 145.913 MHz (CW)
Beacon/ROBOT 145.959 MHz (CW)
Mode T Uplink 21.210 - 21.250 MHz (SSB,CW)
Mode T Downlink 145.917 - 145.956 MHz (SSB,CW)
ROBOT T Uplink 21.130 MHz (CW)
ROBOT T Downlink 145.913 or 145.959 MHz (CW)
Frequencies for RADIO SPUTNIK 13 (RS-13) [Nominal - yet to be measured]
Beacon/ROBOT 29.458 MHz (CW)
Beacon/ROBOT 29.504 MHz (CW)
Mode A Uplink 145.960 - 146.000 MHz (SSB,CW)
Mode A Downlink 29.460 - 29.500 MHz (SSB,CW)
ROBOT A Uplink 145.840 MHz (CW)
ROBOT A Downlink 29.458 or 29.504 MHz (CW)
Beacon/ROBOT 29.458 MHz (CW)
Beacon/ROBOT 29.504 MHz (CW)
Mode K Uplink 21.260 - 21.300 MHz (SSB,CW)
Mode K Downlink 29.460 - 29.500 MHz (SSB,CW)
ROBOT K Uplink 21.138 MHz (CW)
ROBOT K Downlink 29.458 or 29.504 MHz (CW)
Beacon/ROBOT 145.862 MHz (CW)
Beacon/ROBOT 145.908 MHz (CW)
Mode T Uplink 21.260 - 21.300 MHz (SSB,CW)
Mode T Downlink 145.960 - 146.000 MHz (SSB,CW)
ROBOT T Uplink 21.138 MHz (CW)
ROBOT T Downlink 145.862 or 145.908 MHz (CW)
Note: RS-13 has not been activated for enough time over the UK to yet
permit accurate frequency measurement within the confines of the Doppler
shift. It would be appreciated, if heard, for a
Pat Gowen, G3IOR 25 April 1992
18129.SAT
CHARACTERISTICS of RS-10/11
The pair of transponders RS-10 and RS-11 are mated to a NAVSAT
satellite launched from the USSR in 1987, and are powered from the major
spacecraft's supply. They are in a circular orbit of altitude 1000 Km with
a 105 minute period. At this time the RS-10 satellite on mode 'A' is active
continuously, with RS-11 kept in reserve. Various transponder modes are
possible, 'A', 'K', 'T', and combined 'KT' or 'KA'. The telemetry beacon(s)
send the housekeeping information in Morse Code 20 wpm CW. The ROBOT may be
called at any speed between 6 and 50 wpm and will respond at the
called speed. The formula is 'RS10 de G9XXX AR'. The return instructive
response may be 'QRZ', 'RPT', 'QRS', 'QRQ', etc., but when your call is
correctly entered, it will respond to you fully and give a QSO number.
For 'A' mode only 10 watts of 2m CW or USB to a 5 element trained Yagi
or 50 watts to a Ground Plane or Crossed Dipole (Turnstile) are needed,
which need not be circularly polarized. For the 10m downlink, a sloping
dipole or ground plane to the shack receiver will suffice, although a 10m
beam works better for DX. If the receiver is old, then a pre-amplifier will
improve the signal to noise. For Mode 'K' and 'T' needs see RS-12/13.
Frequencies RADIO SPUTNIK 10 (RS-10)
Beacon/ROBOT 29.357 MHz (CW)
Beacon/ROBOT 29.403 MHz (CW)
Mode A Uplink 145.860 - 145.900 MHz (SSB,CW)
Mode A Downlink 29.360 - 29.400 MHz (SSB,CW)
ROBOT A Uplink 145.820 MHz (CW)
ROBOT A Downlink 29.357 or 29.403 MHz (CW)
Beacon/ROBOT 29.357 MHz (CW)
Beacon/ROBOT 29.403 MHz (CW)
Mode K Uplink 21.160 - 21.200 MHz (SSB,CW)
Mode K Downlink 29.360 - 29.400 MHz (SSB,CW)
ROBOT K Uplink 21.120 MHz (CW)
ROBOT K Downlink 29.357 or 29.403 MHz (CW)
Beacon/ROBOT 145.857 MHz (CW)
Beacon/ROBOT 145.903 MHz (CW)
Mode T Uplink 21.160 - 21.200 MHz (SSB,CW)
Mode T Downlink 145.860 - 145.900 MHz (SSB,CW)
ROBOT T Uplink 21.120 MHz (CW)
ROBOT T Downlink 145.857 or 145.903 MHz (CW)
Frequencies for RADIO SPUTNIK 11 (RS-11)
Beacon/ROBOT 29.407 MHz (CW)
Beacon/ROBOT 29.453 MHz (CW)
Mode A Uplink 145.910 - 145.950 MHz (SSB,CW)
Mode A Downlink 29.410 - 29.450 MHz (SSB,CW)
ROBOT A Uplink 145.830 MHz (CW)
ROBOT A Downlink 29.407 or 29.453 MHz (CW)
Beacon/ROBOT 29.407 MHz (CW)
Beacon/ROBOT 29.453 MHz (CW)
Mode K Uplink 21.210 - 21.250 MHz (SSB,CW)
Mode K Downlink 29.410 - 29.450 MHz (SSB,CW)
ROBOT K Uplink 21.130 MHz (CW)
ROBOT K Downlink 29.407 or 29.453 MHz (CW)
Beacon/ROBOT 145.907 MHz (CW)
Beacon/ROBOT 145.953 MHz (CW)
Mode T Uplink 21.210 - 21.250 MHz (SSB,CW)
Mode T Downlink 145.910 - 145.950 MHz (SSB,CW)
ROBOT T Uplink 21.130 MHz (CW)
ROBOT T Downlink 145.907 or 145.953 MHz (CW)
Pat Gowen, G3IOR 27 April 1992
16609.SAT
CHARACTERISTICS of MIR
MIR (Meaning 'Peace' [and 'Earth']) is the USSR/Russian Federation
continously manned Space Station that followed it's predecessor 'SALYUT'
series into orbit on 19 February 1986. It has numerous modules attached
such as KWANT-1, KWANT-II, KRISTALL and others that are given seperate NASA
designators although part of the same object. It is in circular earth 51.6
degree inclination orbit of a period averaging some 92.3 minutes, a perigee
averaging 363 Km and an apogee of 410 Km, but over a period of 3 to 5 weeks
frictional drag will lower the orbit and decrease the period. It will then
be boosted, placing the spacecraft again in to a higher orbit with
increased period and lower mean motion. For this reason, orbital data needs
to be constantly checked and updated by a rapid topical source such as the
AMSAT Nets, otherwise serious incremental tracking errors may result.
The manning MIR cosmonauts are given amateur radio training and
examinations by Boris Stepanove UW3AX and Leonid Labutin UA3CR, and have
been allocated callsigns of elevating numeric 'U' then 'R' with 'MIR'
suffix, e.g. U1MIR, U2MIR, etc., currently R0MIR.
MIR is equipped with with 2.5 watt and 25 watt 2m FM transceivers, an
AX.25 1200 baud standard PACKET terminal and a MAILBOX R0MIR-1. These
facilities can function simultaneously. The station has an additional add
on that permits a continuous information bulletin transmissions or the re-
transmission of uplinked earth calls on a one minute receive one minute
transmit cycling basis. Soon 432 MHz transceivers may be added to the
station. The antenna is a dual band 435/145 MHz 5/8 wavelength whip mounted
on the spacecraft hull exterior adjacent to the main solar panel array.
Whilst the general VHF communications link frequency for MIR is 143.625
MHz WB FM, the normally used amateur radio frequency is S.22 (145.550 MHz)
simplex 10 KHz deviation speech and PACKET FM, although specially nominated
channels splitting uplink and downlink may be used for special events.
MIR is a strong signal, easily heard on any 2m FM receiver equipped with
simple antennas. To actually work MIR, in theory a 1 watt hand held 2m
transceiver would give an adequate signal, but due to the enormous level of
activity heard within the spacecraft footprint from MIR's height, in
practice a far higher eirp is needed to provide the FM capture effect to
overcome QRM.
Whilst QSO's have been made from mobile and portable stations on earth at
quiet times or from remote areas, in Europe and other high S.22 populated
areas some 100 watts to a steerable azimuth/elevation tracking circularly
polarised ten element Yagi is recommended for reliability in effective
communications. QSL's are via RW3DR QTHR.
Pat Gowen, G3IOR 15th May 1994
20442.SAT
CHARACTERISTICS of LUSAT-OSCAR 19 (LO-19)
This satellite is one of the family of the MICROSATS launched by ESA
from Kourou with the SPOT-II satellite in January 1990. Antennas as for
those used for UO-14 (UoSAT-OSCAR-22) are recommended with a similar 145
MHz TX preferably with Varactor Drive. The 435 MHz SSB receiver needs to be
equipped with AFC.
To demodulate the BPSK you will need a G3RUH FUJI BPSK Modem (or others
for which please see WEBERSAT WO-18 etc) and a modified TNC with the
original Modem disconnected. The software and micro requirements are the
same as those recommended for U-O-14.
Programs such as PG.EXE (for transmit and receive) and PB.EXE (file
reception etc) are suitable using the recommended TNC settings of FRACK 6
and MAXF 1
Telemetry aquisition and display of A-O-16, 18, 19 and U-O-22 is
performed by 'DTLM.EXE' written by Jeff ward, G0/K8KA, available from
AMSAT-UK, London, E12 5EQ.
A straight forward 70cm SSB/CW receiver is suitable for the CW TLM.
FREQUENCIES used for LUSAT-OSCAR 19 (LO-19)
Uplinks 145.840, 145.860, 145.880, 145.900 MHz (AFSK/FM)
Downlink (PSK) 437.15355 MHz (BPSK/SSB)
Downlink (RC) 437.12580 MHz (BPSK/SSB)
CW Beacon 437.125 MHz (CW)
Pat Gowen, G3IOR 1 May 1992
14129.SAT
Characteristics of AMSAT-OSCAR-10 (A-O-10)
This satellite was the first functional AMSAT-DL Phase-III satellite
launched by ESA's ARIANE from French Guiana and placed by kick-motor firing
into a highly elliptical orbit with a 36,000 Km Apogee and a 1,500 Km
Perigee. The period is some 10 hours. It has two transponders, but the 'U'
Mode 1269 MHz to 435 MHz transponder is no longer functional. OSCAR-10 is
now on 435/145 MHz Mode 'B' continuously whilst the battery is well charged
by a favourable sun-angle.
The Internal Housekeeping Unit has failed due to radiation damage, thus
no transponder nor antenna switching is now possible. The end-of-arm beam
antennas are inoperative, only the monopole antennas being actoivated. The
telemetry beacon has failed leaving only a plain carrier. The batteries are
aging, and due to no command capability remaining, the solar cells can no
longer be steered into sunlight. Thus, users are requested NOT to use the
transponder when poor regulation of the power supply is demonstrated by
FM'ing of the beacon signal.
The uplink requirements for A-O-10 are accomplished by 25 - 50 watts of
CW or LSB from any conventional 70cm TX to an azimuth/elevation controlled
12 X/Y Yagi or 10 turn RHCP Helix. The dowlink requires an azimuth and
elevation controlled 10 element RHCP Yagi or 8 turn Helix to a low noise
pre-amplifier at the antenna feeding any USB 2m RX.
Frequencies for AMSAT-OSCAR 10 (AO-10)
General Beacon 145.809 MHz (Unmodulated carrier)
Engineering Beacon 145.987 MHz (Switched off)
Mode B Uplink 435.030 - 435.180 MHz (SSB,CW)
Mode B Downlink 145.825 - 145.975 MHz (SSB,CW,inverting)
Pat Gowen, G3IOR 25 April 1992
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