Navman 11 User Manual

16

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

Message ID: 1002
Rate: Variable; defaults to 1 Hz
Message Length: 51 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

Satellite measurement sequence number 

(Note 3)

I

0 to 32 767

10

GPS week number

UI

weeks

0 to 32 767

11-12

GPS seconds into week

UDI

s

0 to 604 799

13-14

GPS nanoseconds from epoch

UDI

ns

0 to 999 999 999

15.0+(3*n)

Measurement used (Note 4)

Bit

1 = used

15.1+(3*n)

Ephemeris available

Bit

1 = available

15.2+(3*n)

Measurement valid

Bit

1 = valid

15.3+(3*n)

DGPS corrections available

Bit

1 = available

16+(3*n)

Satellite PRN

UI

0 to 32

17+(3*n)

C/No

UI

dBHz

0 to 60

51

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: The satellite measurement sequence number relates the position solution data to a particular set of satellite measurements 

found in binary Messages 1002 and 1007 (channel summary message and channel measurement message, respectively).

Note 4: n = 0 to 11.

This message provides a summary form of the 

satellite range measurements and signal tracking 

information on a per- channel basis. The contents 

of the ‘channel summary’ message are described 

in Table 3-6