CONS Constants for earth curvature and refraction

Columns	format	contents/explanation
1-4	A4	CONS
6-20	F15.0	Earth radius            Default : 6 380 000 m
21-30	F10.0	Refraction coefficient        Default : k = 0.13

Earth radius and refraction coefficient are items which are required for correction of measured zenith distances and photo coordinates.

This input statement is necessary only if the constants of 6 380 000 m for earth radius or 0.13 for the refraction coefficient, which are built into the program are to be changed. Such a change may be necessary if, for example, [dm] or [feet] are used as units of measure instead of metres.

The program suppresses correction of earth curvature and refraction if the earth radius is missing or is less than zero.