User's Manual

Atlas PT Technical Manual
41
Along with ID and position information, it contains a host of other status information.
The length of this message may exceed he standard NMEA limit of 79 characters. Any
product or software that uses this message must take this into account.
Following is a list of the fields sent in this message
Field
Usage
Comments
1
$PRAVE
Raveon Proprietary Header
2
From ID
The ID of the transponder that transmitted its position
over the air. It is a decimal number, 0 – 9999.
3
To ID
The ID that this position report was sent to. It is a
decimal number, 0 – 9999.
4
Latitude
dddmm.mmmm format. It is signed. + is north, - is south.
No sign means north. Note: typically there are 4 decimal
places, but as few as 0 decimal places are possible.
Null field if no GPS lock. Leading zeros may be
suppressed in the ddd field.
5
Longitude
dddmm.mmmm format. It is signed. + is east, - is west.
No sign means east. Note: typically there are 4 decimal
places, but as few as 0 decimal places are possible.
Null field if no GPS lock. Leading zeros may be
suppressed in the ddd field.
6
UTC time
The UTC time at the time the transmission was made.
Hhmmss format. Null field if no GPS lock.
7
GPS Status
0=not valid position. 1=GPS locked and valid position.
2=WAAS operation.
8
Num
Satellites
The number of satellites in view
9
Altitude
The altitude in meters. Null field if no GPS lock.
10
Temperature
The internal temperature of the RV-M7 in degrees C.
Typically this is 5-20 degrees above ambient.
11
Battery
Percentage
Percent charge of all batteries currently attached to the
system. Multiply this field by 10 to get the percentage
(10.0 = 100%, 8.6 = 86%, 0.1 = 1%)
12
IO status
A decimal number representing the binary inputs.
13
RSSI
The signal-strength of this message as measured by the
receiver, in dBm. Note, if the message went through a