Req. 5.3.3.1: "SC Command Processing by SIU"

The SIU FSW shall process LAT commands, received from the SC via the CTDB, in the order that they are received.

Basis (help)

[2] (3.2.6.1.1.2), [4] (5.3.1)

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

3.2.6.1.1.2: "LAT Configuration Commands"

The LAT shall be configurable by commands issued by the SC.

Note: The LAT may also internally configure itself, reporting its configuration via telemetry.

4: "LAT T&DF Subsystem Spec. - Level III Spec." (LAT-SS-00019)

5.3.1: "Spacecraft Commanding Interface"

The control system shall accept control commands and data from the spacecraft as specified in the Spacecraft Interface Requirement document, 433-IRD-0001.

Context (help)

Test(s)

002a: Command Functional

This test shall verify that all LAT commands are exercised through the 1553 interface, with command execution and completion status reported in telemetry when command verification features are switched on. The test shall also verify that the SIU FSW validates commands and command parameters prior to command execution. Finally, the test shall verify that the SIU executes individual commands received directly from the SC or executes preprogrammed command sequences (block commands) when triggered by a command from the SC, and can properly execute single commands and block command items in an interleaved or serial fashion, as necessary.