Ashtech Z-sensor Especificações descarregar pdf (Página 124)

104 Z-Family Technical Reference Manual

PPO: Point Positioning

$PASHS,PPO,c

Enable/disable point positioning mode, where c is either Y (enable) or N (disable).

Point positioning is an averaging algorithm that will improve the stand alone accuracy

of a static point after about 4 hours.

Example: Enable point positioning

$PASHS,PPO,Y <enter>

PPS: Pulse Per Second

$PASHS,PPS,d1,f2,c3

The receiver generates PPS pulse with programmable period and offset with respect

to GPS time. The PPS set command allows the user to change the period and the

offset of the pulse, and to either synchronize the rising edge of the pulse with GPS

time, or synchronize the falling edge of the pulse with GPS time. PPS is generated by

default once every second with its rising edge synchronized to GPS time and no

offset.

The period set to 0 will disable the PPS output. Between 0 and 1, the period can be set in increments

of 0.1. Between 1 and 60, the period can be set in increments of 1.

Example: Set PPS to a period of 2 seconds, a offset of 500ms, and synchronize the

rising edge of the pulse with GPS time.

$PASHS,PPS,2,+500,R <enter>

Table 6.36: PPO Parameter Table

Parameter Description Range

c Enable/disable point position mode Y/N

Table 6.37: PPS Message Structure

Parameter Description Range Units

d1 period 0-60 Second

f2 offset ±999.9999 Milliseconds

c3 rising edge or falling edge R / F n/a

1 2 ... 119 120 121 122 123 124 125 126 127 128 129 ... 261 262

Sem comentários

Ashtech Z-sensor Especificações Página 124