Navman 12 User Manual

18

MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.

Message ID: 1005
Rate: Variable
Message Length: 25 words

1-4

Message header

5

Header checksum

6-7

Set time (Note 1)

UDI

10 ms ticks

0 to 4 294 967 295

8

Sequence number (Note 2)

I

0 to 32 767

9.0

Station health

Bit

1 = station bad

9.1

User disabled

Bit

1 = user disabled

9.2-9.15

Reserved

10

Station ID

UI

0 to 1023

11

Age of last correction

UI

s

0 to 999

12

Number of available corrections

UI

0 to 12

j.0-j.5

Satellite PRN (Note 4)

UI

1 to 32

j.6

Local ephemeris

Bit

1 = ephemeris not available

j.7

RTCM corrections

Bit

1 = corrections not available

j.8

RTCM UDRE

Bit

1 = UDRE too high

j.9

Satellite health

Bit

1 = satellite data indicates bad health

j.10

RTCM satellite health

Bit

1 = RTCM source declares  satellite bad

j.11

Corrections stale

Bit

1 = received stale corrections

j.12

lODE mismatch

Bit

1 = lODE mismatch

j.13-j.15

Reserved

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.

This message contains DGPS status information 

derived from the last set of differential corrections 

processed by the receiver. The contents of the 

‘DGPS status’ message are described in Table 

3-8.