| 1 | //----------------------------------------------------------------------------
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| 2 | //# pks_maths.h: Mathematical functions for Parkes single dish data reduction
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| 3 | //----------------------------------------------------------------------------
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| 4 | //# Copyright (C) 1994-2006
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| 5 | //# Associated Universities, Inc. Washington DC, USA.
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| 6 | //#
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| 7 | //# This library is free software; you can redistribute it and/or modify it
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| 8 | //# under the terms of the GNU Library General Public License as published by
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| 9 | //# the Free Software Foundation; either version 2 of the License, or (at your
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| 10 | //# option) any later version.
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| 11 | //#
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| 12 | //# This library is distributed in the hope that it will be useful, but WITHOUT
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| 13 | //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 14 | //# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
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| 15 | //# License for more details.
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| 16 | //#
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| 17 | //# You should have received a copy of the GNU Library General Public License
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| 18 | //# along with this library; if not, write to the Free Software Foundation,
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| 19 | //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
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| 20 | //#
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| 21 | //# Correspondence concerning AIPS++ should be addressed as follows:
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| 22 | //# Internet email: aips2-request@nrao.edu.
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| 23 | //# Postal address: AIPS++ Project Office
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| 24 | //# National Radio Astronomy Observatory
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| 25 | //# 520 Edgemont Road
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| 26 | //# Charlottesville, VA 22903-2475 USA
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| 27 | //#
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| 28 | //# Original: Mark Calabretta
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| 29 | //# $Id: pks_maths.h,v 1.6 2006/05/19 00:12:06 mcalabre Exp $
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| 30 | //----------------------------------------------------------------------------
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| 31 | #ifndef ATNF_PKS_MATHS_H
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| 32 | #define ATNF_PKS_MATHS_H
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| 33 |
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| 34 | // AIPS++ includes.
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| 35 | #include <casa/aips.h>
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| 36 | #include <casa/Arrays/Vector.h>
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| 37 |
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| 38 |
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| 39 | #include <casa/namespace.h>
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| 40 |
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| 41 | // Global mathematical functions for single-dish data reduction.
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| 42 |
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| 43 | // Nearest integral value.
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| 44 | Int nint(Double v);
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| 45 | Double anint(Double v);
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| 46 |
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| 47 | // Round value v to the nearest integral multiple of precision p.
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| 48 | Double round(Double v, Double p);
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| 49 |
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| 50 | // Compute the weighted median value of an array.
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| 51 | Float median(const Vector<Float> &v, const Vector<Float> &wgt);
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| 52 |
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| 53 | // Angular distance between two directions (angles in radian).
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| 54 | Double angularDist(Double lng1, Double lat1, Double lng2, Double lat2);
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| 55 |
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| 56 | // Generalized position angle of the field point (lng,lat) from reference
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| 57 | // point (lng0,lat0) and the angular distance between them (angles in radian).
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| 58 | void distPA(Double lng0, Double lat0, Double lng, Double lat, Double &dist,
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| 59 | Double &pa);
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| 60 |
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| 61 | // Euler angle based transformation of spherical coordinates (radian).
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| 62 | void eulerx(Double lng0, Double lat0, Double phi0, Double theta, Double phi,
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| 63 | Double &lng1, Double &lat1);
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| 64 |
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| 65 | // Low precision coordinates of the sun.
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| 66 | void sol(Double mjd, Double &elng, Double &ra, Double &dec);
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| 67 |
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| 68 | // Low precision Greenwich mean and apparent sidereal time (radian); UT1 is
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| 69 | // given in MJD form.
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| 70 | void gst(Double ut1, Double &gmst, Double &gast);
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| 71 |
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| 72 | // Convert (ra,dec) to (az,el). Position as a Cartesian triplet (m), UT1 in
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| 73 | // MJD form, and all angles in radian.
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| 74 | void azel(const Vector<Double> position, Double ut1, Double ra, Double dec,
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| 75 | Double &az, Double &el);
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| 76 |
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| 77 | // Compute the Solar elevation (radian) using the above functions.
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| 78 | Double solel(const Vector<Double> position, Double ut1);
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| 79 |
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| 80 | #endif
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