11 lines
751 B
Plaintext
11 lines
751 B
Plaintext
The PAL library is a partial re-implementation of Pat Wallace's popular SLALIB
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library written in C using a Gnu GPL license and layered on top of the IAU's
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SOFA library (or the BSD-licensed ERFA) where appropriate. PAL attempts to stick
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to the SLA C API where possible although palObs() has a more C-like API than the
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equivalent slaObs() function. In most cases it is enough to simply change the
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function prefix of a routine in order to link against PAL rather than SLALIB.
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Routines calling SOFA use modern notation and precession models so will return
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slightly different answers than native SLALIB. PAL functions not available in
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SOFA were ported from the Fortran version of SLALIB that ships as part of the
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Starlink software and uses a GPL licence.
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