Spectra-precision Survey Pro v4.6 Ranger Reference Manual User Manual Page 185

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Survey Menu – GPS Module
R-177
Code: the receiver is calculating a code differential solution
(precision is about 1 to 10 meters).
Float: the receiver is calculating a carrier phase differential
solution with float ambiguities (precision is typically within
0.1 m to 0.5 m).
Fixed: the receiver is calculating a carrier phase differential
solution with fixed ambiguities (precision is typically within
15 mm).
H Precision: displays the root mean squared (RMS) error of the
horizontal solution reported by the receiver. It is displayed in project
units.
V Precision: displays the RMS error of the vertical solution reported
by the receiver. It is displayed in project units.
Note: This value is supplied by the receiver, and Survey Pro displays
the receiver’s value without modification. Most manufactures report
this value at the 2 or 3 sigma level. However, since different
manufacturers use different statistical methodology, it is not
necessarily valid to compare the RMS values between brands, or even
between models with different firmware.
HDOP: displays the Horizontal Dilution of Precision. It is a measure
of the geometrical quality of the solution. DOP has no units and
lower numbers indicate better solution geometry.
VDOP: displays the Vertical Dilution of Precision. It is a measure of
the geometrical quality of the solution.
PDOP: displays the Position Dilution of Precision. It is a combination
of HDOP, VDOP and Time Dilution of Precision. It will always be
larger than HDOP and VDOP.
Cell Modem
The Cell Modem card displays information about the radio
communications and allows you to disconnect or reconnect a cell
phone of IP modem connection.
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