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Goal
The goal of the present CLASS (data format and library) improvements
is to provide a (much) less restrictive list of supported
projections. This revision relies on the GREG projection engines
which support:
- more projection systems, namely: none (unprojected spherical
coordinates), gnomonic, orthographic, azimuthal, stereographic,
lambert, aitoff, radio, and sfl.
- non-zero projection angles (when allowed by the projection
system). Before this revision, this support was not possible in
CLASS since there was no provision of such angle in the CLASS Data Format.
With these improvements, a direct application is for example the
native support of the rotated (i.e. scanning is not performed along
azimuth or elevation) On-The-Fly mapping when observing at the
telescope, using the azimuthal projection with a non-zero angle.
Gildas manager
2023-06-01