Navman 11 User Manual
Page 54
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MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.
Message ID: ZCH
Rate: variable; defaults to 1 Hz
Fields: 24
Field No.
Symbol
Field description
Field type
Example
$__ __ZCH
Start of sentence and address field
$PRWIZCH
1-2
SAT_PRN
Channel 1 satellite PRN number (Note 1)
xx
05
2
STATUS
Channel 1 status indication (Note 1)
hh --
F
3-4
...
Channel 2 satellite PRN number and status indication
xx,hh- -
...
5-6
...
Channel 3 satellite PRN number and status indication
xx,hh- -
...
7-8
...
Channel 4 satellite PRN number and status indication
xx,hh- -
...
9-10
...
Channel 5 satellite PRN number and status indication
xx,hh- -
...
11-12
...
Channel 6 satellite PRN number and status indication
xx,hh- -
...
13-14
...
Channel 7 satellite PRN number and status indication
xx,hh- -
...
15-16
...
Channel 8 satellite PRN number and status indication
xx,hh- -
...
17-18
...
Channel 9 satellite PRN number and status indication
xx,hh- -
...
19-20
...
Channel 10 satellite PRN number and status indication
xx,hh- -
...
21-22
...
Channel 11 satellite PRN number and status indication
xx,hh- -
...
23-24
...
Channel 12 satellite PRN number and status indication
xx,hh- -
...
CKSUM
Checksum
*hh
*37
<CR><LF>
Sentence terminator
Note 1: Channel number (xx) is implied by position in message. Data for all 12 channels is always provided in this message. If a
channel is unused, a value of 0 will appear for both channel fields. The status indication (hh__ is a one-digit, hexadecimal value
which represents four bits as follows:
<y.O> Measurement of the satellite on this channel used in navigation solution.
<y.1> Ephemeris available for the satellite on this channel.
<y.2> Satellite on this channel is in track.
<y.3> DGPS corrections available for the satellite on this channel (Note: This bit will never be set whenever the configuration of a
particular Jupiter GPS receiver does not support DGPS).
Table 3-53 ZCH message (Navman proprietary Jupiter channel status)
3.6.1.9 Navman proprietary Jupiter channel status
(ZCH).
This message complements the GSV message by
providing satellite-to-channel mapping and a status
indication for each channel. The contents of the
‘ZCH’ message are described in Table 3-53.
Sample message:
$PRWIZCH,05,F,20,F,04,F,09,F,16,F,06,F,07,6,
00,0,24,F,00,0,00,0,00,0*37