Remote elevation – Spectra Precision FAST Survey Reference Manual User Manual

Page 199

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Store

: Pressing the Store icon immediately stores the point at your current location, overriding the interval.

GPS Start and Stop

: This button alternates between stop (square, red) and play (arrow, green) icons. While the

GPS is running or the robotic total station is tracking, the stop icon allows you to stop the surveying equipment

from taking readings. When the button is pressed, the GPS or robotic total station stops, and the button switches to

the play icon, which can be pressed to resume the readings.

Monitor/Skyplot

: This button can be found on the bottom right of the MAP screen for GPS. This "binocular" icon

opens the Monitor/Skyplot dialog.

Note:

In GPS mode, if you run Auto Points at Interval and points do not store, check that your RMS tolerances

for storing are not set too low. Points will be stored only when your RMS values are less than those specified in

tolerances under the EQUIP tab.. Also note that you may find that the points store at a distance apart exceeding that

specified by your interval due to latency and your speed of movement.

Remote Elevation

This command allows you to observe a point that cannot be reached vertically, such as a power line, building top, etc.

The routine uses two observations - one for the base point and one for the vertical angle to the target object. The routine

then calculates the target point's elevation.

By placing the prism below or above the desired point, FAST Survey stores information about the base point. Then you

can take a second reading, observing only the zenith/vertical angle to the true target point. Using these two

observations, FAST Survey calculates the intersection of the extended zenith/vertical angle with a vertical line from the

base point to determine the elevation. Reporting includes the elevation of the target object as well as the elevation

difference between the prism and the target object.

Steps to take a remote elevation reading are as follows:

1.

Select Remote Elevation from the SURVEY tab of the main menu.

2.

Confirm your orientation, and re-shoot the backsight as necessary.

3.

Press Enter to observe base point (see the figure below). Point the instrument toward the target and press Enter.

4.

Press Enter to shoot target elevation (see the figure below). Sight instrument on the desired point (such as a wire or

top of pole or point on a building) and press Enter.

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