Static Survey; Figure 4.2 Inside View Of Kit Bag - ashtech Z-Xtreme System Manual

Static Survey

Prior to leaving the office to perform a GPS survey, check the following items:
1. Check through the GPS system to ensure all components are present to
successfully perform the survey.
2. Check to ensure that the batteries are charged.
3. Using the Mission Planning module of the post-processing software, check
the satellite availability for the time period when data is to be collected.
Ensure that satellite geometry is sufficient to support good GPS surveying.
Satellite geometry is measured using a calculated value call Dilution of
Precision (DOP). A number of different DOP values exist, the most common
of which is Position Dilution of Precision (PDOP). The Mission Planning
software will give PDOP values for the time periods in which data is intended
to be collected. Avoid collecting data during periods where PDOP values are
larger than 4 (the lower the number the better). Refer to the documentation
accompanying the post-processing software for more details on PDOP and

Figure 4.2 Inside View of Kit Bag

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