Spectra Precision Survey Pro 3.80 Recon GPS Reference Manual - Manual (Page 46)

GPS Reference Manual
46
Projection Key In Setup - Datum Translations
Choose an ellipse for the new zone.
•
Ellipse from List : choose this option to use the selected data
base ellipsoid.
•
Ellipse Values: choose this option to enter the values for the
custom ellipsoid.
Values : is where you enter the values for the custom ellipse if you
are not using Ellipse from List :
Ellipse a : is where you enter the semi major axis of the new ellipsoid.
Other Parm : is where you select the other ellipse parameter to enter.
You can use one of: Semi minor axis; Flattening; Reciprocal
flattening; First eccentricity; First eccentricity squared; Second
eccentricity; Second eccentricity squared.
Projection Key In Setup - Datum Translation
The following screen is only displayed when Datum type is Molodensky
or Similarity .
Datum Translations From WGS84 : is where you enter
the three translations from WGS84 to the local datum.
Note: The sign convention for the datum translations is
from WGS84 to the local datum. If your datum
transformation is defined for local to WGS84, be sure to
reverse the sign of the values before entering into Survey
Pro.