
Surveying with ProMark2
77
Surveyi
ng
with Pr
oMark2
10 KM
(6MI) - displays when there has been enough data collected to process a
vector between this receiver and any other receiver simultaneously collecting data
within 10 KM (6 MI) of this receiver.
15 KM
(9MI) - displays when there has been enough data collected to process a
vector between this receiver and any other receiver simultaneously collecting data
within 15 KM (9 MI) of this receiver.
20 KM
(12MI) - displays when there has been enough data collected to process a
vector between this receiver and any other receiver simultaneously collecting data
within 20 KM (12 MI) of this receiver.
So,
first, you must estimate the distance between this receiver and other receivers
being used in the survey. Using the longest distance estimate, wait for the
Observation Timer to display the value which meets this distance. When this
occurs, you have collected enough data to successfully process the longest vector.
Note: Obstructions will sometimes cause the Observation Timer to prematurely
indicate that enough data has been collected. When working in an obstructed
area, collect a little extra data to ensure the processing will go smoothly.
•
Elapsed Time
The
Elapsed
Time
field displays the amount of time since data storage began for
the current observation session. As you become more experienced with the
system, you will get a feel for the amount of time required to collect data under
different observation conditions.
•
# Sats
The
#Sats
field displays the current number of healthy satellites above a 10
°
elevation being logged into memory. Periods of low satellite number will require
more data to be collected for a successful observation. This can be a good
indicator of the effect of obstructions at the survey site at any given time during
data collection.
•
PDOP
The
PDOP
field displays the PDOP value at any given time, computed from all
observed healthy satellites above a 10
°
elevation. Periods of high PDOP will
require more data to be collected for a successful observation. This can be a good
indicator of the effect of obstructions at the survey site at any given time during
data collection.
In addition to the survey status information, the
Survey Status
screen also presents
the same power and memory status displays found on the
Satellite Status
screen.
15. Press the
Menu
button to access the
Survey Menu
if any receiver or survey
parameter needs to be changed.
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