Trimble Outdoors SK8 - Manual (Page 131)

Lassen-SK8 Embedded GPS Module A-67
Trimble Standard Interface Protocol
A.18.8 Report Packet 0x8F-19
This packet reports whether the UTM output packets is enabled. If bit 4 byte 0 in packet
0x35 /0x55 is single precision, 0x17 will be output.
A.18.9 Report Packet 0x8F-20
This packet provides complete information about the current position velocity fix in a
compact, fixed-length 56-byte packet. The fields are fixed-point with precision matched to
the receiver accuracy. It can be used for automatic position/velocity reports. The latest fix
can also be requested by
0x 8E-20 or 0x37 commands.The data format is shown below.
Table A-80. Report Packet 8F-18 Field Descriptions
Byte Description Type Value
0 Subcode Byte 0x18
1 Gridzone Designation Char
2-3 Gridzone Integer
4-11 Northing Double Meters
12-19 Easting Double Meters
20-27 Altitude Double Meters
28-35 Clock Bias Double Meters
36-39 Time of Fix Single Seconds
Table A-81. Command Packet 0x8F-19 Field Descriptions
Byte Description Type Value
0 Subcode Byte 0x19
1 UTM Status Char E = Enable
D = Disable
Table A-82. Report Packet 0x8F-20 Data formats
Byte/
Item
Type Meaning
0 Sub-packet id /
BYTE Id for this sub-packet (always 0x20)
1 KeyByte / BYTE Reserved for Trimble DGPS Post-processing.
2-3 east velocity /
INTEGER units 0.005 m/s or 0.020 m/s (see Byte 24). Overflow =
0x8000
4-5 north velocity /
INTEGER units 0.005 m/s or 0.020 m/s (see Byte 24). Overflow =
0x8000