Package  Description 

org.britastro.grelf  
org.britastro.grelf.astro  
org.britastro.grelf.hopper 
Class and Description 

Angle
Angles as objects that know what units they are in, know how to do trigonometry without
needing help with unit conversion, and are therefore much less errorprone in lengthy calculations.
In java.lang.(Strict)Math you have to keep track of whether an angle is in degrees or radians when you use trigonometrical functions; the present class knows what to do, so you can forget about it! This should reduce the potential for errors of the degrees/radians kind. Rationale A continual refrain in Jean Meeus' excellent series of books on astronomical computation is the risk of errors due to the fact that angles are usually given in degrees but trigonometry requires radians. 
Angle.Format
For formatting output values as strings.

Angle.Units
Various units used for angles, and their symbols.

Maths.Statistics
Just a record to hold public values.

Class and Description 

Angle
Angles as objects that know what units they are in, know how to do trigonometry without
needing help with unit conversion, and are therefore much less errorprone in lengthy calculations.
In java.lang.(Strict)Math you have to keep track of whether an angle is in degrees or radians when you use trigonometrical functions; the present class knows what to do, so you can forget about it! This should reduce the potential for errors of the degrees/radians kind. Rationale A continual refrain in Jean Meeus' excellent series of books on astronomical computation is the risk of errors due to the fact that angles are usually given in degrees but trigonometry requires radians. 
Angle.Units
Various units used for angles, and their symbols.

RangeDouble
Convenience record for holding a pair of doubles indicating the low and high ends of a range.

Class and Description 

RangeDouble
Convenience record for holding a pair of doubles indicating the low and high ends of a range.
