Lassen SQ, Справочное руководство

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A Trimble Standard Interface Protocol (TSIP)
8 8 Lassen SQ GPS Receiver
A.15.10
Command Packet 0x2B - Initial Position (Latitude,
Longitude, Altitude)
This packet provides the GPS receiver with an approximate initial
position in latitude and longitude coordinates (WGS-84). This packet
is useful if the user has moved more than about 1,000 miles since the
previous fix. (Note that the GPS receiver can initialize itself without
any data from the user; this packet merely reduces the time required
for initialization.) This packet is ignored if the receiver is already
calculating positions. The data format is shown in the table below.
Note – To initialize with ECEF position, use Command Packet 0x23.
A.15.11
Command Packet 0x2D - Request Oscillator Offset
This packet requests the calculated offset of the GPS receiver master
oscillator. This packet contains no data. The GPS receiver returns
Packet
0x 4D. This packet is used mainly for service. The permissible
oscillator offset varies with the particular GPS receiver unit.
Table A.15 Command Packet 0x2B Data Format
Byte Item Type Units
0-3 Latitude Single Radians, north
4-7 Longitude Single Radians, east
8-11 Altitude Single Meters