Spectra Precision Survey Pro v3.80 Recon iPAQ User Manual - Manual (Page 143)

Screen Examples
135
•
If performing a sun shot, check the Non-Linear Declination
Correction checkbox. (Leave it unchecked for star shots.)
•
Check the Correct to State Grid checkbox if you want the
computed azimuth corrected to align with the local state
plane coordinate system.
Note: The Central Meridian and Zone Constant values for the United
States are provided in Appendix A of the Reference Manual.
7. Refer to a current ephemeris and fill in the remaining five values.
When the screen is correctly filled in, tap the
Shots tab.
Note: The GHA0 and Decl0 values are read from the ephemeris for
the current date. The GHA24 and Decl24 values are listed in the
ephemeris for the following day. The semi-diameter is in minutes
and seconds so your value will look something like
0.16084 .
8. Tap the
6KRRW button to open the Enter Shot Data
screen.
9. Enter the correct hours to GMT in the Hrs To GMT
field, aim toward the backsight and tap 7DNH 6KRW to
record the horizontal angle to the backsight. (The
true azimuth to this point will be computed at the
end of the routine.)
Note: The hours to GMT will be between -5 and -8 when
in the continental United States.