Rtk Surveying - ashtech Z-Surveyor Operation And Reference Manual

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RTK Surveying

Real-time differential positioning involves a reference (base) station receiver
computing the satellite range corrections and transmitting them to the remote stations.
The reference station transmits the corrections in real time to the remote receivers via
a telemetry link. Remote receivers apply the corrections to their measured ranges,
using the corrected ranges to compute their position.
RTK (Real-time kinematic) positioning can be used in lieu of real-time differential
positioning. RTK uses the carrier signal in addition to the code signal and is much
more accurate. Although messages transmitted and calculations performed vary, RTK
is essentially a special form of differential positioning. A base station receiver is
required to transmit RTK data to remote receivers. The remote receivers use the RTK
data to compute a corrected position.
As stand-alone, the Z-Surveyor and Z-FX can compute a position to around 15 meters
(100 m with Selective Availability - SA - Set in the satellite). Differential GPS
achieves sub-meter precision at a remote receiver, and RTK positioning achieves
centimeter accuracy at a remote receiver.
A communication link must exist between the base and remote receivers. The
communication link can be a radio link, telephone line, cellular phone,
communications satellite link, or any other medium that can transfer digital data.
Operations
From the main menu press ↑ < 2 seconds until
selected, press ↓ >2 seconds to enter the submenu.
With
SURVCONF
submenu, press ↑< 2 seconds repeatedly until
Within the
SURVCONF
is selected.
is not displayed, press ↓ <2 seconds to place the receiver
If
KINEMATIC
in edit mode.
Press ↑< 2 seconds repeatedly until
Press ↑+↓ <2 seconds to accept the parameter setting (pressing ↑+↓ >2
seconds cancels the parameter setting).
submenu, press ↑< 2 seconds repeatedly until
Within the
SURVCONF
is selected.
EPOCH COUNTER
Press ↓ <2 seconds to place the receiver in edit mode.
Enter the correct value in the
time and press ↑+↓ <2 seconds to accept the parameter setting.
SURVCONF
is selected.
KINEMATIC
submenu one digit at a
EPOCH COUNTER
is selected.
MODE
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