Instruction manual

Command Response Formats Page 149
Command
Query Sensor ID and DBEN Message Type
$PASHQ,IDR
The associated query command is $PASHQ,IDR, and the response message is in the
form:
$ssddR,ttt
Example: Query: $PASHQ,IDR
Response: $BS??R,RPC
Packed DBEN
$PASHR,RPC
DBEN is a packed message which contains one epoch of GPS pseudo-range and
carrier phase measurements. It is an essential message which is used for CPD
operation.
The response message is in the form
$PASHR,RPC,<data length><packed data>
where the field structure is as defined in Table 4.103.
Table 4.104 details the structure of the <packed data> field.
Table 4.103: RPC Message Structure
Field Type Size in Bytes Description
data length unsigned short 2 number of bytes in <packed data> part
packed data unsigned char data length See table below
chksum unsigned short 2 Acumulative unsigned short summation of
the <packed data>, after <data length>
before <ChkSum>
Table 4.104: Packed Data Field Structure
Data
Type
Symbol Range
Reso-
lution
Compress
Num.
Bits
Description
double rcvtime 0 to
60480000
0
1 msec 30 Receiver time in GPS
milliseconds of week
char (4) site ID 32 Receiver 4-character site ID