The end of June 2004 FSW Demonstration (actually held on July 12) is focused on the LAT Housekeeping system. The housekeeping software accumulates, examines, and reports LAT health and status information to the Spacecraft. In the Flight Unit, the Housekeeping task collects voltages, currents, and temperatures from LAT hardware components, as well as low rate science counters, processor metrics, and communications statistics.

The Spacecraft is represented in these demonstrations by the Spacecraft Data Interface Simulator (SDIS), a high-fidelity Spacecraft simulator provided by Spectrum Astro, Inc. The LAT is represented by the FSW Testbed, which currently includes a large collection of flight-like data acquisition hardware including a flight-like SIU, a complete GASU, PDU, and multiple TEMs. A correspondingly large collection of FSW is in place to drive this hardware.

Demonstration Agenda

• LAT Housekeeping

Goals of the Demonstration

The demonstration shows the following components of FSW in action:

• The LHK package. LHK provides the infrastructure to schedule collection of housekeeping data, packetize that data, and successfully hand it to the 1553 service.

• All of the associated infrastructure that directly supports LHK operation:

  1. The CTDB and CCSDS packages provide 1553 communications.

  2. LCB, DAB, and DEM provide communication with LAT hardware.

  3. PBC and SBC provide a boot process for the SIU. PBC also issues boot housekeeping telemetry.

• All of the low-level infrastructure that supports functioning of the SIU on the Testbed: PBS, MSG, VXW, and CMX

• The LCAT package. Although not shown today in Room B-101, LCAT was used offline in preparation for the demo to define all telemetry messages that will be displayed.

• Progress on FSW Requirements. The SRS lists seven Housekeeping-specific requirements. Today's demo shows progress on three of seven.