5.3 Format
Exhibit B
The telemetry format shall
be suitable for the transmission of all as may be required for the analog,
and command register data, status,
The ranging tones and the time of management and control of the satellite. occurrence of the sun and earth sensor pulses and the master index pulse shall be transmitted in real time as may be necessary to meet the requirements for attitude and orbit determination and thruster firing.
5.4 RF Link
on
The signal will be The telemetry carrier shall be phase modulated.
There shall be two received by an
earth station, located at Hong Kong.
The frequencies telemetery transmitters separate carrier frequencies.
and 4200 Mlz. The EIRP during transfer orbit shall be between 4198 Milz
minimum of 4.5 dBW and
on-station EIRP in operation shall be a operational configuration shall be a minimum of 3.0 dBW.
the
the
5.5 Telemetry Antenna
The telemetry subsystem is capable of using either the omnidirectional antenna or the high gain communications antenna.
5.5.1 Omni Antenna Pattern
The
omnidirectional telemetry
antenna
radiation
to
be pattern the satellite spin
shall
toroidal with maximum radiation essentially normal axis. The antenna beamwidth in the plane containing the spin axis shall be such as to provide for necessary telemetry reception during the complete
mission.
5.6 Calibration and Tolerance
the full range of The calibration
shall be calibrated over All telemetry channels values anticipated during operation of the spacecraft. accuracy stated below is defined as relative to the quantity as presented at the TT&C station. Assuming correction is made by linear interpolation of the 0 and +5 volt calibration channels, the telemetered values between tolerance at initial integrated system test for each parameter is ±2.5 percent of its full scale range. The EOL tolerance for each parameter, including
degradation, shall be 15 percent of its full
allowance for all sources scale range.
of
6.0
COMMAND SUBSYSTEM
6.1 General Description
A command subsystem shall be provided which is capable of reliably controlling the operating modes, including attitude, orbital position, and The command subsystem shall consist antenna beam pointing of the satellite.
B-22