Message 1005 (Dgps Status) - Navman 12 Designer's Manual

3.5.1.4 Message 1005 (DGPS Status)

This message contains DGPS status information
derived from the last set of differential corrections
Message ID: 1005
Rate: Variable
Message Length: 25 words
Word No.
1-4 Message header
5 Header checksum
6-7 Set time (Note 1)
8 Sequence number (Note 2)
9.0 Station health
9.1 User disabled
9.2-9.15
10
11 Age of last correction
12 Number of available corrections
j.0-j.5 Satellite PRN (Note 4)
j.6 Local ephemeris
j.7 RTCM corrections
j.8 RTCM UDRE
j.9 Satellite health
j.10 RTCM satellite health
j.11 Corrections stale
j.12 lODE mismatch
j.13-j.15
25 Data checksum
Note 1: Set time is an internal 10 millisecond (T10) count since power-on initialisation enabled the processor interrupts. It is not used
to derive GPS time, but only serves to provide a sequence of events knowledge. The set time or T10 count references the receiver's
internal time at which the message was created for output. The T10 range is approximately 71 weeks.
Note 2: The sequence number is a count that indicates whether the data in a particular binary message has been updated or
changed since the last message output.
Note 3: Only the correction status words for the number of available corrections reported in word 12 of this message are valid.
Note 4: The word number, j, ranges from 13 to 24.
MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.
Name
Status (9.0-9.15)
Reserved
Station ID
Correction status per satellite (Note 3)
Reserved
Table 5-8 Message 1005 (DGPS status)
processed by the receiver. The contents of the
'DGPS status' message are described in Table
3-8.
Type Units
UDI 10 ms ticks
I
Bit
Bit
UI
UI s
UI
UI
Bit
Bit
Bit
Bit 1 = satellite data indicates bad health
Bit 1 = RTCM source declares satellite bad
Bit
Bit
Range
0 to 4 294 967 295
0 to 32 767
1 = station bad
1 = user disabled
0 to 1023
0 to 999
0 to 12
1 to 32
1 = ephemeris not available
1 = corrections not available
1 = UDRE too high
1 = received stale corrections
1 = lODE mismatch
18