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Date: 18 May 94 15:21:30 -0400
From:  "71331.1337@CompuServe.COM@INTERNET"

To:  "amsat-bb@AMSAT.Org@INTERNET" 
(Reply not requested)
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
(Continued to next message)
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