Navman 11 User Manual
Page 49
49
MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.
Message ID: ERR
Rate: variable
Fields: 3
Field No.
Symbol
Field description
Field type
Example
$-- --ERR
Start of sentence and address field
$PRWIERR
1
Class: 0 = user mode exception, 1 = executive mode exception,
2 = trap, 3 = executive error, 4 = ESR error, 5 = user error
x.x
0
2
Exception, trap, or error number
x.x
0
3
Word address of condition
hhhhhh
005BC9
CKSUM
Checksum
*hh
*01
Table 3-46. ERR message (Navman proprietary error/status)
Message ID: GGA (while receiver is in navigation mode, see Note 1)
Rate: variable; defaults to 1 Hz
Fields: 14
Field No.
Symbol
Field description
Field type
Example
$--GGA
Start of sentence and address field
$GPGGA
1
POS_UTC UTC of position (hours, minutes, seconds, decimal seconds)
hhmm.ss.ss
222435
2
LAT
Latitude
1111.11
3339.7334
3
LAT_REF
Latitude direction (N = north, S = south)
a
N
4
LON
Longitude
yyyyy. yy
11751.7598
5
LON_REF Longitude direction (E = east, W = west)
a
W
6
GPS_QUAL GPS quality indicator (Note 2)
x
2
7
NUM_SATS Number of satellites in use, 00 to 12
xx
06
8
HDOP
Horizontal dilution of precision
x.x
1.33
9
ALT_MSL
Antenna altitude above/below mean sea level (geoid) (Note 3)
x.x
27.0
10
M
Units of antenna altitude (metres)
m
M
11
GEOID_SEP Geoidal separation (Note 4)
x.x
–34.4
12
M
Units of geoidal separation (metres)
m
M
13
DGPS_AGE Age of differential GPS data (Note 5)
x.x
7
14
STA_ID
Differential reference station ID (0000 to 1023) (Note 6)
xxxx
0000
CKSUM
Checksum
*hh
*41
Note 1: When the navigation solution is invalid, fields 1 to 5 and 8 to 14 are null. Field 7 also has special meaning (see Note 3).
Note 2: GPS quality indicator: 0 = fix not available or invalid; 1 = GPS fix; 2 = DGPS fix.
Note 3: The geodetic altitude can be computed from the mean sea level altitude by adding the geoidal separation (word 11).
Note 4: Geoidal separation is the difference between the WGS-84 Earth ellipsoid and mean sea level (geoid).
Note 5: Time in seconds since the last SC1-04 Type 1 or Type 9 update; null field when DGPS is not used.
Note 6: This field is null when DGPS is not used.
Table 3-47. GGA message (GPS fix data)
3.6.1.2 Navman proprietary error/status (ERR)
This message provides diagnostic information if
the receiver encounters an error during execution
of its firmware. The contents of the ‘ERR’ message
are described in Table 3-46.
Sample message:
$PRWIERR,0,0,005BC9*0l
3.6.1.3 GPS fix data (GGA)
This message contains time, position, and fix
related data for the Jupiter receiver. When a
navigation solution passes all validity criteria
(set using the binary ‘solution validity criteria’
message), a GGA message is generated
automatically. If any of the validity criteria are
invalid for the solution, a GGA message is not
generated. The contents of the ‘GGA’ message are
described in Table 3-47.
Sample message:
$GPGGA,222435,3339.7334,N,11751.7598,W,
2,06,1.33,27.0,M,-34.4,M,7,0000*41