Req. 5.2.2.1.3: "Data Format"

All data exchanged across the CTDB interface shall be formatted as CCSDS telecommand or telemetry packets, as specified in [7].

Basis (help)

[1] (3.1.2.5.1.1), [2] (3.2.5.4.6)

1: "Mission System Spec." (NASA 433-SPEC-0001)

3.1.2.5.1.1: "Packetized Data"

All instrument data shall be compliant with CCSDS Packet Telemetry Recommendations as defined in Series 100 Blue Books.

2: "LAT Instrument - Spacecraft Interface Requirements Doc." (NASA 433-IRD-0001)

3.2.5.4.6: "Packet Format"

All LAT science data transferred over the high rate bus shall be CCSDS Source Packets as defined in the Packet Telemetry Blue Book.

7: "GLAST 1553 Bus Protocol Interface Control Doc." (1196 EI-S46310-000)

Context (help)

Test(s)

001: 1553 Interface Test

This test shall first verify the electrical characteristics of the LAT 1553 interface, then demonstrate (in conjunction with a spacecraft simulator) that the LAT can exist on the bus without responding to messages directed to other remote terminals. Next, processing of telemetry requests shall be demonstrated, followed by exercising the command interface to the LAT and verifying that all commands and command data are correctly interpreted. Commands need not be executed to successfully carry out this test. Timing measurements for the standard message traffic shall also be performed.