Performing a sun shot – Spectra Precision Survey Pro v3.80 Recon iPAQ User Manual User Manual
Page 142
User’s Manual
134
Performing a Sun Shot
1.
Setup over a point with known or assumed coordinates and aim
the total station at the backsight point to which you will
determine the azimuth.
2.
From the Main Menu, select
6XUYH\ , 6RODU 2EVHUYDWLRQ .
3.
A dialog will open asking you to select an observation
method and tap OK. For this example we will select
the
Find Azimuth Using Ephemeris Data
option since it
contains a couple additional steps.
4.
Enter the latitude and longitude for your occupy point
in the
Lat.
and
Long.
fields, respectively.
Note: Your latitude and longitude should have enough
accuracy if it is scaled from a topographic map or
measured using a handheld GPS unit.
5.
In the
Aim
field, select the area of the celestial body
where you plan to take your measurements. For sun
shots, the trailing edge is usually used. (The left edge
when in the northern hemisphere.)
6.
Tap the
&RUUHFWLRQV« button if the correction settings
displayed to the right of the button need to be changed.