Exhibit B
7.13.2
6) Bus voltage
7) Solar array temperature
Commands
Command capability as required to perform the control function of 7.12 shall be provided.
8.0 THERMAL CONTROL
such that stable and satisfactory The spacecraft design shall be temperature environments are maintained for all components during launch, transfer orbit and during synchronous orbit for the duration of the mission design life and the various operating modes. Thermal control shall achieved primarily by passive means, that is, excluding mechanical moving Consideration shall be given to the use of a parts, but allowing heaters.
bulk heater to control the minimum temperature of sensitive components.
The
The thermal design shall be based on a multinode network analysis. analysis shall be adjusted to correlate closely with the thermal-vacuum test results. Maximum and minimum temperature of all units shall be predicted.
9.0 STRUCTURE
i
The structure has been designed to support all subsystems under all These environments shall environments during the lifetime of the spacecraft. include ground handling transportation, launch operations, transfer orbit, and synchronous orbit.
!
10.0 APOGEE MOTOR
The apogee motor subsystem shall be designed to provide a velocity increment to the spacecraft such that the spacecraft is injected from a nominal transfer orbit into a synchronous, circular, equatorial orbit. incremental velocity provided shall be predictable to within ±1 percent.
The
The environments imposed on the spacecraft by apogee motor firing shall The apogee be such that no degradation of spacecraft systems shall occur. motor and its handling procedures shall be designed in accordance with all current range safety requirements. The igniter shall contain a safe and arm device. Means shall be provided to view the safe and arm status.
The
apogee
motor shall
perform within specification after being subjected to all normal environments including storage and up to 12 transfer orbits. A measurement of apogee motor case temperature shall be included in the telemetry list.
L
B-29
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