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4. Field survey
4.1.Static survey
4.1.1.Static survey introduction
Two (or more than two) GNSS receivers are used, and they are respectively placed on the
measuring stations for simultaneous observation, and the GPS positioning measurement to
determine the relative position between the measuring stations.
Scope of application：
Establish a national terrestrial control network (second class or below);
Establish precision engineering control network, such as bridge survey, tunnel survey, etc.;
Establish various encrypted control networks, such as urban survey, map root point survey, road
survey, boundary survey, etc.;
GPS surveys used in small and medium-sized cities, towns and surveying, cadastral, land information,
real estate, geophysical prospecting, surveying, building construction, etc.
4.1.2.Static survey operation steps
a. Set up the tripod on the observation point, set the receiver to static working mode and attach it on
the tripod, then center and level it strictly.
b. Measure the antenna height.
c. Record the point name, device model, device height, start/end observation time, observation period
and number of satellites.
d. Power on the receiver and confirm that the receiver is in static mode. The receiver starts to search
for satellites and the satellite lights begin to flash. When the recording conditions are reached, the
satellite lights will flash at a preset sampling interval. A flash indicates that an epoch has been
collected.
e. After the data collection is completed, power off the receiver, and then perform data transmission
and data processing.
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