"LAT Burst Trigger Alert Telemetry" (APP/LPA)

View Options: (help)

Focus:	Maintenance / Operation
Structures:	Abstract / Concrete

Context:

Description:

One LATTRIGGER Alert Telemetry packet per burst is sent to the SC for transmission to the ground.

Layout:  (hide detail; help)

LAT Burst Trigger Alert Telemetry (ALRTTRG) Telemetry Packet Format
0x	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
000	Version=0			T=0	SH	APID=0x341
002	SF		Sequence Count
004	Packet Length=81
006	Timestamp
00E	RECINFO info
010	TSEC dcl_sec
014	TUSEC dcl_usec
018	BCLASS bclass
01C	BSIG temporal
01E	BSIG spatial
020	BRA ra
022	BDEC dec
024	BERR err
026	GCNT loc_cnt
028	TSEC ep_sec
02C	TUSEC ep_usec
030	TSEC lp_sec
034	TUSEC lp_usec
038	GCNT gam_cnt[0-3]
040	BQUAT quaternion[0-3]
048	TRGPRM trg_prm[0-7]

ALRTTRG (pkt)
|  RECINFO info (bf)
|  |  RECVER ver (0-3)
|  |  RECTYP typ (4-7)
|  |  RECSEQ seq (8-15)
|  TSEC dcl_sec (fld)
|  TUSEC dcl_usec (fld)
|  BCLASS bclass (bf)
|  |  BRSVD rsvd (0-11)
|  |  BCNF confirmed (12)
|  |  BTYPE type (13)
|  |  BMETH method (14-15)
|  |  BSIZE size (16-31)
|  BSIG temporal (fld) ... spatial (fld)
|  BRA ra (fld)
|  BDEC dec (fld)
|  BERR err (fld)
|  GCNT loc_cnt (fld)
|  TSEC ep_sec (fld)
|  TUSEC ep_usec (fld)
|  TSEC lp_sec (fld)
|  TUSEC lp_usec (fld)
|  GCNT gam_cnt[0-3] (fld)
|  BQUAT quaternion[0-3] (fld)
|  TRGPRM trg_prm[0-7] (fld)

typedef struct _LPA_ALRTTRG_Tlm {

    /* Telemetry header */
    char                 hdr[14];

    /* Record Info */
    LPA_RECINFO          info;

    /* Time Seconds */
    unsigned int         dcl_sec;

    /* Time Microseconds */
    unsigned int         dcl_usec;

    /* Burst Classification */
    LPA_BCLASS           bclass;

    /* Burst Significance */
    unsigned short       temporal;

    /* Burst Significance */
    unsigned short       spatial;

    /* Burst Location RA */
    unsigned short       ra;

    /* Burst Location DEC */
    short                dec;

    /* Burst Error in Arcmin */
    unsigned short       err;

    /* Gamma Counts */
    unsigned short       loc_cnt;

    /* Time Seconds */
    unsigned int         ep_sec;

    /* Time Microseconds */
    unsigned int         ep_usec;

    /* Time Seconds */
    unsigned int         lp_sec;

    /* Time Microseconds */
    unsigned int         lp_usec;

    /* Gamma Counts */
    unsigned short       gam_cnt[4];

    /* Burst Quaternion */
    unsigned short       quaternion[4];

    /* Trigger Parameter */
    unsigned short       trg_prm[8];

} LPA_ALRTTRG_Tlm;

Fields:

BCLASS (index)

Attribute(s):  

Brief:  "Burst Classification"

Instance(s):  bclass

GRB Burst classification.

BDEC (index)

Attribute(s):  

Brief:  "Burst Location DEC"

Instance(s):  dec

BERR (index)

Attribute(s):  

Brief:  "Burst Error in Arcmin"

Instance(s):  err

BQUAT (index)

Attribute(s):  

Brief:  "Burst Quaternion"

Instance(s):  quaternion

BRA (index)

Attribute(s):  

Brief:  "Burst Location RA"

Instance(s):  ra

BSIG (index)

Attribute(s):  

Brief:  "Burst Significance"

Instance(s):  spatial, temporal

GCNT (index)

Attribute(s):  

Brief:  "Gamma Counts"

Instance(s):  gam_cnt, loc_cnt

RECINFO (index)

Attribute(s):  

Brief:  "Record Info"

Instance(s):  info

TRGPRM (index)

Attribute(s):  

Brief:  "Trigger Parameter"

Instance(s):  trg_prm

TSEC (index)

Attribute(s):  

Brief:  "Time Seconds"

Instance(s):  dcl_sec, ep_sec, lp_sec

TUSEC (index)

Attribute(s):  

Brief:  "Time Microseconds"

Instance(s):  dcl_usec, ep_usec, lp_usec