4 SBF Reference
4.2.5
Galileo Decoded Message Blocks
GALNav
Number:
4002
"OnChange"
interval: output each time a new navigation data batch is decoded.
The
GalNav
block contains the following decoded navigation data for one Galileo satellite:
• orbital elements and clock corrections
• health, Signal-In-Space Accuracy (SISA) indexes and Broadcast Group Delays (BGDs) for
each carrier or carrier combinations.
The interpretation of the clock correction parameters (
t_oc
,
a_f0
,
a_f1
,
a_f2
) depends on
the value of the
Source
field:
Source Message type Applicable Clock Model
2
16
If the receiver is decoding both the I/NAV and the F/NAV data stream, it will output a
GalNav
block for the I/NAV stream, containing the (L1, E5b) clock model, and a different
GalNav
block for the F/NAV stream, containing the (L1, E5a) clock model.
Depending on the message type being decoded, some health, SISA or BGD values may
not be available (in that case they are set to their respective Do-Not-Use values). The
following health, SISA and BGD values are guaranteed to be available for a given value of the
Source
field:
Source
Health, SISA and BGD availability
DVS
, L1-B
HS
, E5b
DVS
,E5b
HS
, SISA_L1E5b and BGD_L1E5b are available
16 (F/NAV) At least E5a
DVS
,E5a
HS
, SISA_L1E5a and BGD_L1E5a are available
The
IODNav
field identifies the issue of data. All orbital elements, clock parameters and SISA
values in the block are guaranteed to refer to the same data batch identified by
IODNav
.
The fields
Health_OSSOL
,
BGD_L1E5a
,
BGD_L1E5b
and
CNAVenc
are not covered by the
issue of data, and the block simply contains the latest received value.
Please refer to the Galileo Signal-In-Space ICD for the interpretation and usage of the
parameters contained in this SBF block.
Parameter
Type Units
Do-Not-Use
Description
Sync1
c1
Block Header, see 4.1.1
Sync2
c1
u2
ID
u2
Length
u2
1
byte
u4
0.001
s
4294967295
u2
1
week
65535
u1
SVID of the Galileo satellite (see 4.1.9)
Source
u1
See table above: this field indicates how to interpret the clock
correction parameters.
347
Summary of Contents for PolaRx5TR
Page 1: ...PolaRx5TR Reference Guide Applicable to version 5 5 0 of the Firmware ...
Page 73: ...3 Command Line Reference Chapter 3 Command Line Reference 73 ...
Page 130: ...3 Command Line Reference COM1 gim CR R gim IonosphereModel off COM1 130 ...
Page 237: ...3 Command Line Reference COM1 237 ...
Page 279: ...3 Command Line Reference COM1 279 ...
Page 294: ...4 SBF Reference Chapter 4 SBF Reference 294 ...