Specifications

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You may need to determine the position of an existing point
where, obviously, the location is not debatable. In situations
were an existing point is in a heavily obstructed area, you may
be forced to establish a new point offset from the existing
point, or preferably a pair of intervisible points, and conven
-
tionally traverse to the required point to establish its position.
Be aware that obstructions at a GPS data collection site will
affect the observation time required to accurately determine
its location. Obstructed areas will require longer observation
times.
The Observation Range function of the ProMark3 will auto-
matically extend observation times at obstruction sites but in
some cases, it may not extend the observation period long
enough. You will have to use your own judgement of observa
-
tion times when surveying obstructed site. Your judgement
will improve through experience.
For large surveys utilizing 3 or more ProMark3 receiver sys-
tems, you may want to reckon all the site locations as part of
your survey planning. This will eliminate any delays during the
actual execution of the survey if problems are encountered
finding an appropriate site.
The more receiver systems utilized during the survey, the
harder the task of coordinating the data collection becomes.
Remember, data must be collected simultaneously between
points where a vector is desired. If one receiver operator is late
in starting data collection due to problems with site location,
this could cause problems.