Description

The Housekeeping tasks monitor instrument housekeeping information, including voltages, currents, and temperatures. They also package the information for downloading.

The Master is responsible for interrogating the instrument housekeeping systems (e.g., counters, currents, voltages). It assembles housekeeping packets to go into 1553 data stream. The Slaves provide packets of CPU metrics for the Master to put into the housekeeping stream.

The Housekeeping subsystem operates (simultaneously) in three modes:

• Slave Loop

  The Slaves send CPU metric messages to the Master.

• Master Loop

  The Master sends Inquiry messages to the LAT Instrument. The LAT returns a Response message to the Master, which sends Report packets to the Spacecraft.

• Spacecraft Command

  The Spacecraft sends Command packets to the Master, which sends Report packets to the Spacecraft (possibly interrogating the LAT).

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