kwiik@hila.hut.fi (Kaj Wiik) (11/12/90)
SB AMSAT @ ALL < RK3KP $03B004RK3KP
RadioM1/Rudak2
R:901103/0935z @RK3KP [NORD><LINK MOSCOW, TheBox 1.6 OP: RA3APR]
de RK3KP @ RK3KP
RADIO-M1/RUDAK-2
================
The joint work of AMSAT-U and AMSAT-DL for creating the
set of equipment for the satellite RADIO-M1/RUDAK-2 is
completed.
The idea of the cooperation between two groops in the
USSR and Germany appeared in the spring 1989. The discussion
about what and how it is necessary to do lasted till the meeting
of the representatives of two groops in Surrey in July 1989 when
the mutual preliminary agreement about the cooperation was
signed.
The final version of the agreement about the cooperation
was signed in the autumn 1989, when the work over the project
was being done.
According to the mutual agreement the group ORBITA AMSAT-U
develops and makes the linear transponder, command radio link,
telemetry system, power supply system and decides all the
questions with the official organisations about the placing of
the equipment and launching.
The RUDAK group of AMSAT-DL developes and makes the digital
part so called RUDAK-2. This part includes a digipeater and a
mailbox (protocol AX-25).It also provides other possibilitys
for the experiments on the transmitting of the information
using modern digital methods. It also contains input and
output RF circuits.
The complete set for ground command station is developed
by Amsat-U-Orbita and Amsat-U-Sputnik groups.Rudak group
brings special digital part for it.
During the launch and orbital test period ground command
station will be situated in Molodechno at UC1CWA and in
Moscow at RK3KP. The ground command station for Rudak-2
only will be situated near Munchen-DK1YQ and near
Hannover-DB2OS.
The final agreement was signed:
from the side of AMSAT-U-ORBITA the technical director of
the project "RADIO-M1" - V.Chepyzhenko - RC2CA;
from the side of AMSAT-DL - the president of it K.Meinzer -
DJ4ZC.
The coordinators of the project are P.Guelzow - DB2OS and
L.Labutin - UA3CR
SPECIFICATIONS OF THE RADIO-M1/RUDAK-2
______________________________________
Mission
-------
Piggy-back onboard the USSR geological research
satellite.
Launch and Orbit
----------------
1. Launch (scheduled)
Time: Late of 1990, day is not fixed.
Launch site: North Cosmodrom Plesetsk
2. Orbit (planned)
slightly elliptical polar orbit
appogee: 1000 km
Inclination: 83 degrees
Period: 105 minutes
Satellite specifications
------------------------
1. Dimension and shape
Cylinder of hight about 4 meters
diameter 1.8 meters
2. System configuration
Professional geological research equipment, telemetry
system, command link equipment, transponders and power
supply, thermal control.
Amateur linear and digital transponders, telemetry
system, command link equipment, power supply.
3. Attitude control
Satellite attitude will be maintained by the earth's
gravity field by a rod 9 meters length pointing away
from the earth.
4. Planned service life: 3 years
Radio-M1/Rudak-2 System specifications
--------------------------------------
1. System configuration
Two sets of the equipment will be installed aboard the satellite:
Linear transponder #1 mode B and RUDAK-2 with subsystems
Linear transponder #2 mode B with subsystems
The first set is concidered to be the main. The second one is
reserve. It can be taken into operation in the case of
failure of the first one.
2. Commands
Equiped with real-time program command function
3. Beacons and telemetry #1 set
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)
4. Beacons and telemetry #2 set
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 telemetry 30 channels 145.800 MHz 2.0 Watts
1100 bps BPSK/FM, deviation 2kHz
5. Transponders #1 set
(1) Linear transponder: inversely heterodined 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
Uplink EIRP required about 100 Watts
(2) 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 disc, four separate uplink channels.
Uplink frequencies: RX-1 435.016 MHz 1200bps,FSK,NRZIC/Biphase-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
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)
6. Transponder #2 set
Linear transponder: inversely geterodined translator
Uplink passband 435.123 to 435.043 MHz
Downlink frequencys 145.866 to 145.946 MHz
Transmitter output max 10 Watt max.
Bandwith (3db) 80 kHz
Uplink EIRP required about 100 Watts
7. Antennas
(1) 435 MHz receiving antenna (shared by analog and digital modes):
Helix +3 db max RHCP.
(2) 145 MHz transmitting antenna:
Half wave dipol
8. Power supply
From main power supply system up to 100 Watts
Set #1 consumption 47 Watts
Set #2 consumption 40 Watts
9. Weight
Set #1 approx. 28 kg
Set #2 approx. 22 kg
10. Size: 480x400x300 mm^3 each set.
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03.11.90 __ ends____ de UA3CR
/EX