Multiple data types are returned on the SSR event stream. Note Science data telemetry apid range is 928 to 1023 (0x3A0 - 0x3ff) (Ref: LAT-TD-07664, section 13)
0x3A0 LRA data returned via the SSR
...
0x3d4-0x3d7 MEM dump data
0x3d9-0x3dd ASC/Event monitoring statistics
0x3de-0x3e2 LCB stats
...
0x3fe PIG dumps *Note* packet 0x3fe not documented on http://www.slac.stanford.edu/exp/glast/flight/web/a_cat/prod/WMA/hide/tlm_k_APID.shtml
as of 3 Jan, 2007
Theoretically, these data formats are defined in the FSW-ISOC ICD (LAT-SS-05141). However, the design of the software interface should not rely too heavily on the particular binary data format as it can and will change. (Ex: DFI/DFIP and the QSE packages)