Trimble Outdoors Part Number 45005-00-ENG manual 00x8F-20, Table A-87 Report Packet 8F-20

Trimble Standard Interface Protocol A

00x8F-20

Report Packet 8F-20

Last Fix with Extra Information (binary fixed point)

This packet provides information concerning the time and origin of the previous position fix. This is the last-calculated fix; it could be quite old. The receiver sends this packet in response to Packet 8E-20; it also can replace automatic reporting of position and velocity packets. Automatic output of 8F-20 must also be enabled by setting bit 5 of byte 0 in command packet 0x35 and bit 0 of bytes 1-2 in command packet 0x8E-A5.

The data format is shown in the table below.

Table A-87 Report Packet 8F-20

Byte #	Item/Type	Meaning
0	Subpacket ID / BYTE	ID for this subpacket (always 0x20)
1	KeyByte/BYTE	Reserved for Trimble DGPS postprocessing
2-3	east velocity /	units 0.005 m/s or 0.020 m/s (see Byte 24).
	INTEGER	Overflow = 0 x 8000
4-5	north velocity /	units 0.005 m/s or 0.020 m/s (see Byte 24).
	INTEGER	Overflow = 0 x 8000
6-7	up velocity /INTEGER	units 0.005 m/s or 0.020 m/s (see Byte 24).
		Overflow = 0 x 8000
8-11	Time of Week /	GPS Time in milliseconds
	UNSIGNED LONG
12-15	Latitude / LONG	Latitude, units = 2-31semicircle, according to
	INTEGER	current datum.
		Range = -230to 232
16-19	Longitude /	Longitude east of meridian, units = 2-31
	UNSIGNED LONG	semicircle, according to current datum.
		Range = 0 to 232
20-23	Altitude / LONG	Altitude above ellipsoid, mm, according current
	INTEGER	datum.
24	Velocity Scaling	When bit 0 is set to 1, velocities in Bytes 2-7
		have been scaled by 4.

A-106 Acutime 2000 Synchronization Kit User Guide