Table of Contents
Advertisement
Precise Surveying - Field Applications & Concepts
Post-Processed Surveying
Key Terms and
Expressions
298
• When you are over the point, mark its location on the
ground. You can save the coordinates of the stakeout point
with or without a position averaging period.
• The rover will then automatically prompt you to walk to the
next point from the list and will guide you to this point.
In post-processed surveying, the field equipment is only used
to record GPS/GNSS raw data from which the post-processing
software will be able to output centimeter-accurate positions.
This section describes the implementation rules common to
all surveys performed with the post-processing method and
presents the possible three field applications:
• Static survey.
• Stop & Go Kinematic survey.
• Continuous Kinematic survey.
Baseline: Distance between the base antenna phase center
and the rover antenna phase center (see also GNSS Antennas
and Antenna Heights on page 313). Fundamentally, the
surveying system is used to determine all the components of
the vector formed by the baseline.
GPS/GNSS Raw Data or Raw Data for short: Data delivered by
a GNSS receiver including code and carrier phase
measurements and other satellite-related data such as
almanacs and ephemerides.
Log Interval: Parameter used by some receivers in Continuous
Kinematic survey to define the time elapsed, in seconds, or
the distance traveled, in meters, between any two successive
markers inserted into the logged raw data file.
NOTE: Log Interval vs. Raw Data Recording Rate. The Log
Interval should not be less than the Raw Data Recording
Rate. For example, if Raw Data Recording Rate=1 second,
then Log Interval should be at least 1 second (or 2 meters if
your walking speed is 5 km/hr)
Observation Time: Time during which a base and rover
simultaneously log GNSS raw data. The flow of collected data
will be entirely usable if it's continuous from start to end of
the observation.
Occupation Time: Time spent on a survey point without
moving ("static" occupation). In static survey, Occupation
time= Observation time because only one point is surveyed.
Occupation time is irrelevant to Continuous Kinematic.
Advertisement
Table of Contents
