STAR*NET V6 - Circe
STAR*NET V6 - Circe
STAR*NET V6 - Circe
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Chapter 5 Preparing Input Data<br />
INLINE OPTION: .CURVE ON/OFF (Default is ON)<br />
By default, <strong>STAR*NET</strong> assumes that all survey observations entered as data are normal<br />
measurements taken on the face of the earth. In all the calculations performed to<br />
determine “horizontal” distances, the effects of both earth curvature and refraction are<br />
taken into consideration. These calculations affect all 3D adjustments containing zenith<br />
angle observations and 2D adjustments where zenith angles are used to reduce slope<br />
distances to horizontal.<br />
If you have removed the effects of earth curvature and refraction by modifying your<br />
zenith angles by some method, you must tell <strong>STAR*NET</strong> so this will be taken into<br />
consideration during processing. Enter the “.CURVE OFF” inline option before any<br />
zenith angle observations that have been modified for earth curvature and refraction.<br />
M 52-51-53 133-23-55 95-30-22 #pure field observations<br />
M 53-52-54 97-44-31 96-11-56<br />
.CURVE OFF #hand-modified zenith angles<br />
M 78-74-75 120-27-56 94-26-34<br />
M 78-74-77 102-44-34 95-21-54<br />
M 77-78-79 84-54-33 89-53-42<br />
.CURVE ON #back to field observations<br />
M 65-62-94 112-22-33 234.27<br />
etc...<br />
And then be sure to return back to the default “.CURVE ON” mode when entering pure,<br />
unmodified field observations so <strong>STAR*NET</strong> will again consider standard curved earth<br />
geometry and refraction in its calculations.<br />
INLINE OPTION: .ADDCENTERING ON/OFF (Default is Off)<br />
By default, standard error values explicitly entered on data lines are used exactly as<br />
given. By default, they are not affected by any centering error values entered in your<br />
project options or instrument library. If you have a reason for wanting centering applied<br />
to explicitly entered standard errors, (or to cause weighting in your data files be handled<br />
exactly the same as in earlier versions which did apply centering to explicitly entered<br />
standard errors), you can use this inline option.<br />
M 2-1-3 45-33-44 1357.234 91-22-46 2 .03 9 5.4/5.6<br />
.ADDC ON<br />
M 2-1-4 88-11-22 1234.321 89-33-57 2 .03 9 5.4/5.6<br />
.ADDC OFF #Change back to normal<br />
For example, in the first data line above, the explicitly entered standard errors shown<br />
underlined will be by default used exactly as entered. In the second data line, the entered<br />
standard errors will be inflated by any centering error settings currently in effect.<br />
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