
Surveying with ProMark2
59
Surveyi
ng
with Pr
oMark2
after a loss of lock is critical to maintaining survey accuracy.
Finally, kinematic surveys are most successful when the kinematic base receiver is close to the
kinematic rover. Accuracies of GPS-derived positions are distance-dependent. The greater the
distance between the GPS receivers, the larger the uncertainty. In an ideal case, the kinematic
base should be on the same project site as the kinematic rover. Kinematic surveys with a
separation of more than 10 kilometers (6 miles) between the kinematic base and rover should
be avoided. Such a separation makes kinematic initialization more difficult, increasing the
chances of poor results.
When performing a kinematic survey, ProMark2 provides you with the tools to perform the
following tasks:
• Manage data files in the GPS receiver
• Enter pertinent survey point attribute information required for data processing
• Monitor the progress of the kinematic survey
Stop-and-go or Kinematic Base
When selecting the location for your base, be sure the location is as free of satellite
obstructions as possible. The more open the area, the better your chances of a successful
survey. If obstructions, such as trees or buildings, at the base station cause the GPS receiver to
not maintain lock on at least 5 satellites throughout the kinematic data collection period, there
is a good chance some of the points observed by the rover will be lost. Take great care in
selecting the base location.
Base setup and operation is similar to a static survey. The difference between a static survey
setup and a base setup is the optional use of the initializer bar at the base station.
Position the ProMark2 antenna over the survey point. If you intend to use the initializer bar for
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