Leica Geosystems GPS Basics - Manual (Page 46)

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GPS Basics -1.0.0en Surveying with GPS
5.2 Pre-survey preparation
Before heading out into the field, the
surveyor needs to prepare for the survey.
Items that must be considered are:
1. Radio Licences
2. Power - charged batteries
3. Spare cables
4. Communication between survey
parties
5. Coordinates of Reference Station
6. Memory cards - Do you have enough
spare memory?
7. Observation schedule. First objective
should be to get enough information
for determination of Transformation
Parameters, then aim for redundancy
of observations.
5.3 Tips during operation
For Static and Rapid Static surveys,
always fill out a record sheet for each
point you survey. An example is given on
the next page.
With Static and Rapid Static surveys, it is
vital that the antenna height is measured
correctly. This is one of the most com-
mon mistakes when carrying out a GPS
survey. Measure the height at the
beginning and end of occupation. With
Kinematic and RTK Surveys, the an-
tenna is usually mounted on a pole
which has a constant height.
During Static and Rapid Static surveys,
the GPS antenna has to be kept totally
still. This also applies to the Rapid Static
initialization of Kinematic surveys (but
not to Kinematic on the Fly or RTK
surveys). Any movement or vibration in
the antenna can adversely affect the
result.