"LAT Burst Trigger Telecommand" (APP/LPA)

ITOS Mnemonic:  GFSWLATTRIGGER

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Focus:	Maintenance / Operation
Structures:	Abstract / Concrete

Context:

Description:

One GFSWLATTRIGGER telecommand per burst is sent to the GBM (and a corresponding Alert Telemetry Packet is sent to the ground).

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LAT Burst Trigger Telecommand (BurstTrg) Telecommand Packet Format
0x	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
000	Version=0			T=1	SH	APID=0x6F1:1
002	SF=3		Sequence Count
004	Packet Length=15
006	0	Function Code=1
008	LBD_SEC sec
00C	LBD_USEC usec
010	BUR_CLASS class
014	Packet Checksum

BurstTrg (pkt)
|  LBD_SEC sec (fld)
|  LBD_USEC usec (fld)
|  BUR_CLASS class (fld)

typedef struct _LPA_BurstTrg_Pkt {

    /* CCSDS header */
    char                 hdr[8];

    /* Command payload */
    LPA_BurstTrg_Prm     pay;

} LPA_BurstTrg_Pkt;

Fields:

BUR_CLASS (index)

Attribute(s):  

Brief:  "LAT Burst Classification"

Instance(s):  class

1 = This is a repoint candidate 0= Not a candidate

LBD_SEC (index)

Attribute(s):  

Brief:  "LAT Burst Declaration Time Seconds"

Instance(s):  sec

The LAT specified burst declaration time (identical in all packets related to the same burst). Serves as Burst ID.

LBD_USEC (index)

Attribute(s):  

Brief:  "LAT Burst Declaration Time Usec"

Instance(s):  usec

The LAT specified burst declaration time (identical in all packets related to the same burst). Serves as Burst ID.