"SC Ancillary Broadcast Message" (APP/LSM)

ITOS Mnemonic:  LSMSIANCILLARY

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Focus:	Maintenance / Operation
Structures:	Abstract / Concrete

Context:

Description:

The SC sends this message once a second on the CTDB bus. It contains a variety of ancillary information about the SC status.

Layout:  (hide detail; help)

SC Ancillary Broadcast Message (SIANCILLARY) 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=0x701:2
002	SF=3		Sequence Count
004	Packet Length=39
006	0	Function Code=2
008	TIMESEC sec
00C	TIMESUB sub
010	ANCPOS pos[0-2]
01C	ANCVEL vel[0-2]
028	ANCMODE mode								ANCSSR ssr
02A	ANCFLAGS flags
02C	Packet Checksum

SIANCILLARY (pkt)
|  TIMESEC sec (fld)
|  TIMESUB sub (fld)
|  ANCPOS pos[0-2] (fld)
|  ANCVEL vel[0-2] (fld)
|  ANCMODE mode (fld)
|  ANCSSR ssr (fld)
|  ANCFLAGS flags (fld)

typedef struct _LSM_SIANCILLARY_Pkt {

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

    /* Command payload */
    LSM_SIANCILLARY_Prm  pay;

} LSM_SIANCILLARY_Pkt;

Fields:

ANCFLAGS (index)

Attribute(s):  

Brief:  "Ancillary SC flags"

Instance(s):  flags

ANCMODE (index)

Attribute(s):  

Brief:  "Ancillary GNC mode"

Instance(s):  mode

ANCPOS (index)

Attribute(s):  

Brief:  "Ancillary position element"

Instance(s):  pos

ANCSSR (index)

Attribute(s):  

Brief:  "Ancillary SSR usage"

Instance(s):  ssr

ANCVEL (index)

Attribute(s):  

Brief:  "Ancillary velocity element"

Instance(s):  vel

TIMESEC (index)

Attribute(s):  

Brief:  "Timestamp seconds"

Instance(s):  sec

TIMESUB (index)

Attribute(s):  

Brief:  "Timestamp microseconds"

Instance(s):  sub