(a) Structure of message
PartNOTES
Header PartDefined in (b)
Mask PartDefined in (c), available only if SDF067 = 1
Orbit Correction PartDefined in (d), available only if SDF048 = 1
Clock Correction PartDefined in (e), available only if SDF049 = 1
URA PartDefined in (f), available only if SDF063 = 1
Phase Bias PartDefined in (g), available only if SDF045 = 1
Code Bias PartDefined in (h), available only if SDF046 = 1
(b) Header part
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
Message NumberDF002uint12124073 (constant)
Message SubType IDSDF001uint4414 (constant)
GNSS Hourly Epoch TimeSDF002uint1212
SSR Update IntervalDF391bit(4)4
Multiple Message IndicatorSDF044bit(1)1
IOD SSRDF413uint44
IOD maskSDF068uint55
ResolutionSDF066bit(1)1
Mask AvailabilitySDF067bit(1)1
Orbit AvailabilitySDF048bit(1)1
Clock AvailabilitySDF049bit(1)1
URA AvailabilitySDF063bit(1)1
Phase Bias AvailabilitySDF045bit(1)1
Code Bias AvailabilitySDF046bit(1)1
TOTAL44 or 44+Ns
(c) Mask part
(c.1) the header part of the mask
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
Number of GNSSSDF004uint44
Satellite sub-mask AvailabilitySDF070bit(1)1
Number of submaskSDF071uint44Available only if SDF070 = 1
TOTAL5
(c.2) the body part of the mask (repeated for SDF004)
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
GNSS IDSDF005uint44
Satellite maskSDF006bit(40)40
Signal maskSDF007bit(16)16
Cell-mask AvailabilitySDF042bit(1)1
Cell-maskSDF008bit(X)X (X< = 128)Available only if SDF042 = 1
TOTAL61+X or 61
(c.3) Sub-mask part
(c.3.1) the header part of the sub-mask (included only if SDF070 = 1, repeated for SDF071)
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
Satellite sub-mask IDSDF072uint44
Number of GNSSSDF004uint44Ng
TOTAL8
(c.3.2) the body part of the sub-mask (included only if SDF070 = 1, repeated for SDF005)
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
GNSS IDSDF005uint44
Satellite sub-maskSDF073bit(X)X (X< = Ns)Subset of SDF006
TOTAL4+X
(d) Orbit correction part (repeated for selected satellites)
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
GNSS IODESDF009uint8 or uint108 or 10
Delta RadialSDF010int1515
Delta Along-TrackSDF011int1313
Delta Cross-TrackSDF012int1313
TOTAL49 or 51
(e) Clock correction part
(e.1) the header part of clock correction
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
Satellite sub-mask AvailabilitySDF070bit(1)1
Satellite sub-mask IDSDF072uint44Available only if SDF070 = 1
TOTAL5
(e.2) the body part of clock correction (repeated for selected satellites)
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
Delta Clock C0SDF013int1515
TOTAL15
(f) URA part (repeated for selected satellites)
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
URADF389bit(6)6
TOTAL6
(g) Phase bias part (repeated for selected satellites and signals)
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
Phase BiasSDF015int1515
Discontinuity IndicatorSDF043uint22
TOTAL17
(h) Code bias part (repeated for selected satellites and signals)
DATA FIELDDF NUMBERDATA TYPENO. OF BITSNOTES
Code BiasSDF014int1111
TOTAL11