Sbas Correction (0x91,0x13)

Description

GNSS calculated SBAS Correction

Notes

UDREI - the variance of a normal distribution associated with the user differential range errors for a satellite after application of fast and long-term corrections, excluding atmospheric effects

UDREI  Variance
-----------------------
0      0.0520 m^2
1      0.0924 m^2
2      0.1444 m^2
3      0.2830 m^2
4      0.4678 m^2
5      0.8315 m^2
6      1.2992 m^2
7      1.8709 m^2
8      2.5465 m^2
9      3.3260 m^2
10     5.1968 m^2
11     20.7870 m^2
12     230.9661 m^2
13     2078.695 m^2
14     "Not Monitored"
15     "Do Not Use"

Parameter Name Data Type Description
Field Length u8 27
Descriptor u8 0x13
Index u8 Index of this field in this epoch.
Count u8 Total number of fields in this epoch.
Time Of Week double GPS Time of week the message was received [seconds]
Week Number u16 GPS Week since 1980 [weeks]
Gnss Id u8 enum GNSS constellation id
NameValueDescription
UNKNOWN0
GPS1
GLONASS2
GALILEO3
BEIDOU4
SBAS5
Sv Id u8 GNSS satellite id within the constellation.
Udrei u8 [See above 0-13 usable, 14 not monitored, 15 - do not use]
Pseudorange Correction float Pseudo-range correction [meters].
Iono Correction float Ionospheric correction [meters].
Valid Flags u16 bitfield
Name Bit(s) Description
udrei 0
pseudorange_correction 1
iono_correction 2
flags 0-2