Rtk surveying – Spectra Precision ProMark 800 Reference Manual User Manual
Page 46
34
Precise Surveying - Field Applications & Concepts
CPD: Carrier-Phase Differential. An acronym that refers to the
processing of reference carrier phase measurements for
precise (RTK) differential measurements.
Fixed (solution): Status of the position solution once RTK
operation is initialized and centimeter-level precision is
achieved.
GNSS: Global Navigation Satellite System. GPS, GLONASS,
SBAS, QZSS and GALILEO are each a GNSS.
SBAS: Satellite Based Augmentation System. A wide-area or
regional system composed of geostationary satellites
providing GNSS augmentation, that is a method of improving
locally the performance (i.e. accuracy, reliability, availability,
etc.) of a GNSS. In addition, the SBAS satellites’ carrier
phase ranging data are used like any other GNSS satellite in
Ashtech’s BLADE –and more recently Z-BLADE– processing
algorithms.
RTK Surveying
RTK (for Real-Time Kinematic) is a surveying method through
which you ask the rover equipment to quasi-instantly
determine the coordinates of your current location with
centimeter precision.
This section describes the implementation rules common to
all surveys performed with the RTK method and presents the
three basic field applications:
• Logging points.
• Logging points in continuous mode (trajectory).
• Staking out.
Depending on the software application installed in the field
terminal, more field functions may be available, for example
for road construction or civil engineering. These additional
functions are all enabled by the capability of the system to
perform one of the three basic functions described in this
section.
Key Terms and
Expressions
Baseline: Distance between the base antenna phase center
and the rover antenna phase center (see also GNSS Antennas
and Antenna Heights on page
surveying system is used to determine all the components of
the vector formed by the baseline.
Base/rover configuration: Refers to an RTK surveying system
consisting of a base and a rover. As opposed to a rover-only
configuration, this system is autonomous in the sense that