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Convenient numeric definitions

PI = 3.14159265359D0

$ \pi$ [DOUBLE]
R2AS = 206264.806247D0

Used to convert radians to arcseconds:

$\displaystyle \mathrm{arcsec} = 3600\frac{180}{\pi}\theta$ (2)

[DOUBLE]

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SURF Programming Interface
Starlink System Note 72
Tim Jenness, John F. Lightfoot
Joint Astronomy Centre, Hilo, Hawaii
10 July 2000
E-mail:ussc@star.rl.ac.uk

Copyright © 2008 Science and Technology Facilities Council