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77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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* This file is part of the StelD project.
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* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#ifndef LIBSOFA_H__
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#define LIBSOFA_H__
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#include <sofa.h>
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#include <sofam.h>
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#include <sys/time.h>
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// JD2451544.5 == 2000.0
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#define MJD2000 (51544)
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typedef struct{
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double utc1; double utc2; // UTC JD, commonly used MJD = utc1+utc2-2400000.5
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double MJD;
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double tai1; double tai2; // TAI JD
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double tt1; double tt2; // TT JD
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} sMJD;
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// polar coordinates & equation of origins (all in radians)
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typedef struct{
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double ha; // hour angle
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double dec; // declination
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double ra; // right ascension
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double eo; // equation of origins
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} polarCrds;
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// horizontal coordinates (all in radians)
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typedef struct{
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double az; // azimuth, 0 @ south, positive clockwise
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double zd; // zenith distance
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} horizCrds;
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// observational place coordinates and altitude; all coordinates are in radians!
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typedef struct{
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double slong; // longitude
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double slat; // lattitude
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double salt; // altitude, m
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} placeData;
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// place weather data
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typedef struct{
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double relhum; // rel. humidity, 0..1
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double php; // atm. pressure (hectopascales)
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double tc; // temperature, degrC
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} placeWeather;
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// DUT/polar almanach data
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typedef struct{
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double DUT1; // UT1-UTC, sec
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double px; // polar coordinates, arcsec
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double py;
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} almDut;
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int get_MJDt(struct timeval *tval, sMJD *MJD);
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int get_ObsPlace(struct timeval *tval, polarCrds *p2000, polarCrds *pnow, horizCrds *hnow);
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int getDUT(almDut *a);
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int getWeath(placeWeather *w);
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int getPlace(placeData *p);
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#endif // LIBSOFA_H__
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