ashtech GG Surveyor, Справочное руководство

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Command/Response Formats 97
Com
m
and
s
PMD: Position Mode
$PASHS,PMD,d
Set position mode for minimum number of satellites required to compute a position,
where d = 0, 1, 2, or 3.
The number of satellites required to compute a position is based on SYS = MIX. For SYS = GPS or
SYS = GLO, the number of satellites required is N - 1. Also, the description of the number of
satellites required to hold altitude fixed is based on the assumption that GTP is set to Y and altitude
will be held fixed before time shift.
Example: Set minimum number of satellites for 3-D computation
$PASHS,PMD,0<Enter>
POP: Position Fix Rate
$PASHS,POP,d
Set the internal update rate of the receiver, where d may be either 2 or 5 Hz, indicating
that the position will be computed 2 or 5 times per second, depending upon the
setting; the default is 2 Hz.
The 2 or 5 Hz rates are available only if the corresponding option has been installed in
the receiver. When POP is set to 5, the number of satellites in the position
computation will be reduced to 16 satellites because of CPU processing limitation.
However, all satellites are tracked, even when the update rate is 5 Hz.
Example: Set the internal update rate to 5Hz
$PASHS,POP,5<Enter>
Table 6.19: Position Mode Settings
Mode Description
d = 0 minimum of 5 satellites needed (e.g., for 3-D)
d = 1 default, minimum of 4 satellites needed; with 4 satellites, altitude is held (2-D); with 5
or more, altitude is not held (3-D) (Default)
d = 2 minimum of 4 satellites needed; altitude always held (always 2-D)
d = 3 minimum 4 satellites needed; with 4 satellites, altitude is always held; with 5 satellites,
altitude is held only if HDOP is greater than HDOP mask (2-D), otherwise 3-D