SBAS Corrections
Satellite Navigation
135
User Manual 1178.6379.02 ─ 01
13 SBAS Corrections
Option: R&S
SMW-K44 and R&S
SMW-K106
A short introduction to the satellite-based augmentation system (SBAS) is provided in
"Brief introduction to the satellite-based augmentation systems (SBAS)"
This section gives an overview of the SBAS features in the context of this software.
13.1 About SBAS
The SBAS uses three types of services to improve augmentation:
●
Transmission of ranging information for improved
visibility
●
Broadcast of correction data (error estimations) for improved
accuracy
●
Broadcast of coarse integrity information for improved
reliability
defines different message types, that
carry these coarse integrities or both integrity and wide area correction data informa-
tion. The correction data can be fast, long-term and ionospheric, where:
●
The fast corrections eliminate pseudorange errors
●
The long-term corrections overcome errors in the satellites position or slow chang-
ing clock and ephemeris errors
●
The ionospheric corrections are based on the user location
SBAS message types (MT)
According to
, SBAS correction data is transmitted by a subset of
predefined message types. In this implementation, the SBAS information is not defined
on a message by message basis but grouped according to the SBAS service and cor-
rection data type.
list the SBAS message type with brief information on their content and
information on the section, describing the related settings.
Table 13-1: SBAS message types (MT)
MT
Content
Related settings
1
PRN masks assailments
See
Chapter 13.4.3.3, "PRN Mask Settings"
2 to 5
Fast corrections
See
Chapter 13.4.3.4, "Fast Correction Settings"
6
Integrity information
Integrity inforamtion is included in
7
Fast correction degradation factor
See
Chapter 13.4.3.6, "Fast Correction Degradation
Factor Configuration Settings"
9
GEO navigation message
See
Chapter 13.4.2.2, "Broadcasted Orbit, Clock and
10
Degradation parameters
See
About SBAS