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Spectra Precision FAST Survey Reference Manual User Manual

Page 132

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Here, you will either be led to the results screen showing the successful calculation, or it will report, "Unable to retrieve

solution results". In the case above, the computed results are shown below:

Note that the "averaged" backsight orientation is 52.9704, although by setting 0 to point 2, the mathematically computed

backsight reading would be 52.9703. An added feature of the Advanced Occupation routine is the calculation of the

occupied point coordinates. In this example, the original point coordinates for point 1 are: N 2734186.7757, E

808615.8663, Z 228.511. The degrees of freedom is the difference between the number of observations and the number

of unknowns. The degrees of freedom increase if more redundant measurements are taken, such as reverse readings or

multiple distance readings, and 20+ degrees of freedom would indicate strong statistical confidence. When the OK

(green check) button is clicked, you have the option to save the occupied point, in which case you can overwrite the

current occupied point, save to a new point ID, or save to the raw file only. Then you continue into the Store Points

command or other commands and can take new measurements.

If you have taken both direct and reverse readings, the report includes data on the collimation of the instrument,

provided that the collimation option is turned on within the settings option

within Advanced Occupation. The

Settings option includes the following settings: