Convert decimal degrees to dms (degrees, minutes, seconds) format. This is probably most useful for declination conversion, since dms is fairly standard method of presenting declination coordinates. The decimal degrees=d+m/60+s/3600. Degrees should range from -90 to +90.
The main cosmic variance calculator function taken from Driver & Robotham (2010). cosvarcar is an interface to the Cartesian coordinate version, whilst cosvarsph is a utility interface to give approximate cosmic variance for astronomy survey regions (usually defined by RA, Dec and redshift limits).
These functions allows comoving, angular size and luminosity distances to be calculated for a given redshift, it can also return look back time. They use curvature correctly, calculated internally using the relation OmegaM+OmegaL+OmegaK=1, but by default they assume a flat Universe where only OmegaM needs to be specified.
Convert hms (hours, minutes, seconds) to degrees format. This is probably most useful for right ascension (RA) conversion, since hms is fairly standard method of presenting RA coordinates. The decimal degrees=15*h+15*m/60+15*s/3600. Should range between 0 and 24 hours. Hours and minutes should be integer and seconds can be decimal.
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