Req. 5.3.10.2.2: "Modification of GRB Criteria"

The default GRB criteria shall be adjustable by command.

Basis (help)

[3] (5.2.14), [4] (5.4.8)

3: "LAT Performance Spec. - Level II(b) Spec." (LAT-SS-00010)

5.2.14: "GRB Location Accuracy On-Board {SRD Table 2}"

The GRB location accuracy on-board shall be better than 10 arcmin, 68% confidence radius, for transients occurring within the LAT FOV, bursts with >100 reconstructed photons above 1 GeV in less than 20 seconds.

The goal is to achieve GRB location accuracy on-board of better than 1 arcmin, 68% confidence radius, for transients occurring within the LAT FOV, bursts with >100 reconstructed photons above 1 GeV in less than 20 seconds.

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

5.4.8: "Pointing Data"

The data flow system shall provide, when enabled, transient event source location pointing information to the spacecraft.

Context (help)

Test(s)

012a: Additional Science Processing - GRB detection and location

This test shall verify the SIU FSW capability to monitor for and detect GRBs in the LAT science data. The test shall involve a variety of simulated observing scenarios, based on Monte Carlo data with signal concentrations in various portions of the FOV. The test shall verify the detection sensitivity and location accuracy requirements for the LAT. The test shall also verify that, when a GRB is detected, the SIU FSW automatically applies a set of looser event filter parameters, allowing more events to be collected for a limited period of time. Finally, this test shall verify the SC notification function and timing requirement.