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SuperNOVAS v1.5
The NOVAS C library, made better
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Solar-system ephemeris lookup via the CALCEPH C library. More...
Functions | |
int | novas_calceph_use_ids (enum novas_id_type idtype) |
Sets the type of Solar-system body IDs to use as object.number with NOVAS_EPHEM_OBJECT types. | |
int | novas_use_calceph (t_calcephbin *eph) |
Sets a ephemeris provider for Solar-system objects using the CALCEPH C library and the specified set of ephemeris files. | |
int | novas_use_calceph_planets (t_calcephbin *eph) |
Sets the CALCEPH C library and the specified ephemeris data as the ephemeris provider for the major planets (and Sun, Moon, SSB...). | |
Solar-system ephemeris lookup via the CALCEPH C library.
This is an optional component of SuperNOVAS, which interfaces to the CALCEPH C library. As such, you may need the CALCEPH runtime libraries in an accessible location (such as in /usr/lib
) to use, and you will need development files (C headers and unversioned libraries) to build. Thus, this module is compiled only if CALCEPH_SUPPORT
is set to 1 prior to the build.
To use, simply include novas-calceph.h
in your application source, configure a t_calcephbin
object with the requisite ephemeris data, and then call novas_use_calceph()
with it to activate. E.g.:
Optionally, you may use a separate ephemeris dataset for major planets (or if planet ephemeris was included in 'eph' above, you don't have to):
By default the CALCEPH plugin will use NAIF ID numbers for the lookup (for planets the NOVAS IDs will be mapped to NAIF IDs automatically). You can enable name-based lookup by setting the object number to -1 (e.g. in make_ephem_object()
), or else switch to using CALCEPH IDs by calling novas_calceph_use_ids(NOVAS_ID_CALCEPH)
.
REFERENCES: