This is the Hour Angle in decimal Hours. Convert Local Sidereal Time and Hour Angle into decimal hours. Subract Hour Angle from Local Sidereal Time. If result is negative add 24. This is the Right Ascension in decimal hours.
Distance is in parsecs.
1 parsec equals 3.2616 light years. The focal point is measured from the bottom of the reflector. G is the gain over an isotropic radiator. D and W are in the same units. Doppler shift due to the earth's rotation.