Trimble Outdoors 58052-00 Benutzerhandbuch

Copernicus GPS Receiver 1 4 1

TRIMBLE STANDARD INTERFACE PROTOCOL (TSIP) A

The seconds count begins with “0” each Sunday morning at midnight GPS time. A
negative indicated time-of-week indicates that time is not yet known; in that case, the
packet is sent only on request. The following table shows the relationship between the
information in Packet

41, and the Packet

46 status code.

Note – Before using the GPS time from Packet 0x41, verify that the Packet 0x46
status code is 00 (“Doing position fixes”). This will ensure the most accurate GPS
time.

Report Packet 0x42 - Single-Precision Position Fix, XYZ ECEF

This packet provides current GPS position fix in XYZ ECEF coordinates. If the I/O
“position” option is set to XYZ ECEF
(byte 0: bit 0, Packet 0x35)and the I/O Precision-of-Position Output (byte 0: bit 4,
Packet 0x35) is set to single-precision, then the GPS receiver sends this packet each
time a fix is computed. The data format is shown below.

The time-of-fix is in GPS time or UTC as selected by the I/O “timing” option. Packet
83 provides a double-precision version of this information.

Table A.26

Packets 0x41 and 0x46 Status Code Relationships

Approximate
Time Accuracy

Time Source

Sign (TOW) Packet 46

Status Code

none

no time at all

0x01

unknown

approximate time from
real-time clock or Packet
2E

0x01

20-50 msec + clock
drift

time from satellite

0x02 - 0x0C

full accuracy

time from GPS solution

0x00

Table A.27

Report Packet 0x42 Data Formats

Byte

Item

Type

Units

0-3

Single

meters

4-7

Single

meters

8-11

Single

meters

12-15

Time-of-fix

Single

seconds