void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
    double *Jul1,*Jul2, *Jul1Ret, *Jul2Ret;
    mxArray *Jul1RetMATLAB,*Jul2RetMATLAB;
    size_t numRow, numCol, numElements,i;

    if(nrhs!=2) {
        mexErrMsgTxt("Wrong number of inputs");
    }

    if(nlhs>2) {
        mexErrMsgTxt("Wrong number of outputs.");
        return;
    }

    numRow=mxGetM(prhs[0]);
    numCol=mxGetN(prhs[0]);
    numElements=numRow*numCol;

    if(numElements==0||numRow!=mxGetM(prhs[1])||numCol!=mxGetN(prhs[1])) {
        mexErrMsgTxt("The dimensionalities of the inputs are incorrect.");
        return;
    }
    checkRealDoubleArray(prhs[0]);
    checkRealDoubleArray(prhs[1]);
    Jul1=(double*)mxGetData(prhs[0]);
    Jul2=(double*)mxGetData(prhs[1]);

    //Allocate space for the return variables.
    Jul1RetMATLAB=mxCreateDoubleMatrix(numRow,numCol,mxREAL);
    Jul1Ret=(double*)mxGetData(Jul1RetMATLAB);
    Jul2RetMATLAB=mxCreateDoubleMatrix(numRow,numCol,mxREAL);
    Jul2Ret=(double*)mxGetData(Jul2RetMATLAB);

    for(i=0; i<numElements; i++) {
        int retVal;
        /*Call the function in the SOFA library.*/
        retVal=iauUtctai(Jul1[i], Jul2[i], Jul1Ret+i, Jul2Ret+i);

        switch(retVal) {
        case 1:
            mexWarnMsgTxt("Dubious Date entered.");
            break;
        case -1:
            mxDestroyArray(Jul1RetMATLAB);
            mxDestroyArray(Jul2RetMATLAB);
            mexErrMsgTxt("Unacceptable date entered");
            break;
        default:
            break;
        }
    }

    plhs[0]=Jul1RetMATLAB;
    if(nlhs>1) {
        plhs[1]=Jul2RetMATLAB;
    } else {
        mxDestroyArray(Jul2RetMATLAB);
    }
}
int iauApio13(double utc1, double utc2, double dut1,
              double elong, double phi, double hm, double xp, double yp,
              double phpa, double tc, double rh, double wl,
              iauASTROM *astrom)
/*
**  - - - - - - - - - -
**   i a u A p i o 1 3
**  - - - - - - - - - -
**
**  For a terrestrial observer, prepare star-independent astrometry
**  parameters for transformations between CIRS and observed
**  coordinates.  The caller supplies UTC, site coordinates, ambient air
**  conditions and observing wavelength.
**
**  This function is part of the International Astronomical Union's
**  SOFA (Standards of Fundamental Astronomy) software collection.
**
**  Status:  support function.
**
**  Given:
**     utc1   double      UTC as a 2-part...
**     utc2   double      ...quasi Julian Date (Notes 1,2)
**     dut1   double      UT1-UTC (seconds)
**     elong  double      longitude (radians, east +ve, Note 3)
**     phi    double      geodetic latitude (radians, Note 3)
**     hm     double      height above ellipsoid (m, geodetic Notes 4,6)
**     xp,yp  double      polar motion coordinates (radians, Note 5)
**     phpa   double      pressure at the observer (hPa = mB, Note 6)
**     tc     double      ambient temperature at the observer (deg C)
**     rh     double      relative humidity at the observer (range 0-1)
**     wl     double      wavelength (micrometers, Note 7)
**
**  Returned:
**     astrom iauASTROM*  star-independent astrometry parameters:
**      pmt    double       unchanged
**      eb     double[3]    unchanged
**      eh     double[3]    unchanged
**      em     double       unchanged
**      v      double[3]    unchanged
**      bm1    double       unchanged
**      bpn    double[3][3] unchanged
**      along  double       longitude + s' (radians)
**      xpl    double       polar motion xp wrt local meridian (radians)
**      ypl    double       polar motion yp wrt local meridian (radians)
**      sphi   double       sine of geodetic latitude
**      cphi   double       cosine of geodetic latitude
**      diurab double       magnitude of diurnal aberration vector
**      eral   double       "local" Earth rotation angle (radians)
**      refa   double       refraction constant A (radians)
**      refb   double       refraction constant B (radians)
**
**  Returned (function value):
**            int         status: +1 = dubious year (Note 2)
**                                 0 = OK
**                                -1 = unacceptable date
**
**  Notes:
**
**  1)  utc1+utc2 is quasi Julian Date (see Note 2), apportioned in any
**      convenient way between the two arguments, for example where utc1
**      is the Julian Day Number and utc2 is the fraction of a day.
**
**      However, JD cannot unambiguously represent UTC during a leap
**      second unless special measures are taken.  The convention in the
**      present function is that the JD day represents UTC days whether
**      the length is 86399, 86400 or 86401 SI seconds.
**
**      Applications should use the function iauDtf2d to convert from
**      calendar date and time of day into 2-part quasi Julian Date, as
**      it implements the leap-second-ambiguity convention just
**      described.
**
**  2)  The warning status "dubious year" flags UTCs that predate the
**      introduction of the time scale or that are too far in the future
**      to be trusted.  See iauDat for further details.
**
**  3)  UT1-UTC is tabulated in IERS bulletins.  It increases by exactly
**      one second at the end of each positive UTC leap second,
**      introduced in order to keep UT1-UTC within +/- 0.9s.  n.b. This
**      practice is under review, and in the future UT1-UTC may grow
**      essentially without limit.
**
**  4)  The geographical coordinates are with respect to the WGS84
**      reference ellipsoid.  TAKE CARE WITH THE LONGITUDE SIGN:  the
**      longitude required by the present function is east-positive
**      (i.e. right-handed), in accordance with geographical convention.
**
**  5)  The polar motion xp,yp can be obtained from IERS bulletins.  The
**      values are the coordinates (in radians) of the Celestial
**      Intermediate Pole with respect to the International Terrestrial
**      Reference System (see IERS Conventions 2003), measured along the
**      meridians 0 and 90 deg west respectively.  For many applications,
**      xp and yp can be set to zero.
**
**      Internally, the polar motion is stored in a form rotated onto
**      the local meridian.
**
**  6)  If hm, the height above the ellipsoid of the observing station
**      in meters, is not known but phpa, the pressure in hPa (=mB), is
**      available, an adequate estimate of hm can be obtained from the
**      expression
**
**            hm = -29.3 * tsl * log ( phpa / 1013.25 );
**
**      where tsl is the approximate sea-level air temperature in K
**      (See Astrophysical Quantities, C.W.Allen, 3rd edition, section
**      52).  Similarly, if the pressure phpa is not known, it can be
**      estimated from the height of the observing station, hm, as
**      follows:
**
**            phpa = 1013.25 * exp ( -hm / ( 29.3 * tsl ) );
**
**      Note, however, that the refraction is nearly proportional to the
**      pressure and that an accurate phpa value is important for
**      precise work.
**
**  7)  The argument wl specifies the observing wavelength in
**      micrometers.  The transition from optical to radio is assumed to
**      occur at 100 micrometers (about 3000 GHz).
**
**  8)  It is advisable to take great care with units, as even unlikely
**      values of the input parameters are accepted and processed in
**      accordance with the models used.
**
**  9)  In cases where the caller wishes to supply his own Earth
**      rotation information and refraction constants, the function
**      iauApc can be used instead of the present function.
**
**  10) This is one of several functions that inserts into the astrom
**      structure star-independent parameters needed for the chain of
**      astrometric transformations ICRS <-> GCRS <-> CIRS <-> observed.
**
**      The various functions support different classes of observer and
**      portions of the transformation chain:
**
**          functions         observer        transformation
**
**       iauApcg iauApcg13    geocentric      ICRS <-> GCRS
**       iauApci iauApci13    terrestrial     ICRS <-> CIRS
**       iauApco iauApco13    terrestrial     ICRS <-> observed
**       iauApcs iauApcs13    space           ICRS <-> GCRS
**       iauAper iauAper13    terrestrial     update Earth rotation
**       iauApio iauApio13    terrestrial     CIRS <-> observed
**
**      Those with names ending in "13" use contemporary SOFA models to
**      compute the various ephemerides.  The others accept ephemerides
**      supplied by the caller.
**
**      The transformation from ICRS to GCRS covers space motion,
**      parallax, light deflection, and aberration.  From GCRS to CIRS
**      comprises frame bias and precession-nutation.  From CIRS to
**      observed takes account of Earth rotation, polar motion, diurnal
**      aberration and parallax (unless subsumed into the ICRS <-> GCRS
**      transformation), and atmospheric refraction.
**
**  11) The context structure astrom produced by this function is used
**      by iauAtioq and iauAtoiq.
**
**  Called:
**     iauUtctai    UTC to TAI
**     iauTaitt     TAI to TT
**     iauUtcut1    UTC to UT1
**     iauSp00      the TIO locator s', IERS 2000
**     iauEra00     Earth rotation angle, IAU 2000
**     iauRefco     refraction constants for given ambient conditions
**     iauApio      astrometry parameters, CIRS-observed
**
**  This revision:   2013 October 9
**
**  SOFA release 2013-12-02
**
**  Copyright (C) 2013 IAU SOFA Board.  See notes at end.
*/
{
   int j;
   double tai1, tai2, tt1, tt2, ut11, ut12, sp, theta, refa, refb;


/* UTC to other time scales. */
   j = iauUtctai(utc1, utc2, &tai1, &tai2);
   if ( j < 0 ) return -1;
   j = iauTaitt(tai1, tai2, &tt1, &tt2);
   j = iauUtcut1(utc1, utc2, dut1, &ut11, &ut12);
   if ( j < 0 ) return -1;

/* TIO locator s'. */
   sp = iauSp00(tt1, tt2);

/* Earth rotation angle. */
   theta = iauEra00(ut11, ut12);

/* Refraction constants A and B. */
   iauRefco(phpa, tc, rh, wl, &refa, &refb);

/* CIRS <-> observed astrometry parameters. */
   iauApio(sp, theta, elong, phi, hm, xp, yp, refa, refb, astrom);

/* Return any warning status. */
   return j;

/* Finished. */

/*----------------------------------------------------------------------
**
**  Copyright (C) 2013
**  Standards Of Fundamental Astronomy Board
**  of the International Astronomical Union.
**
**  =====================
**  SOFA Software License
**  =====================
**
**  NOTICE TO USER:
**
**  BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING SIX TERMS AND
**  CONDITIONS WHICH APPLY TO ITS USE.
**
**  1. The Software is owned by the IAU SOFA Board ("SOFA").
**
**  2. Permission is granted to anyone to use the SOFA software for any
**     purpose, including commercial applications, free of charge and
**     without payment of royalties, subject to the conditions and
**     restrictions listed below.
**
**  3. You (the user) may copy and distribute SOFA source code to others,
**     and use and adapt its code and algorithms in your own software,
**     on a world-wide, royalty-free basis.  That portion of your
**     distribution that does not consist of intact and unchanged copies
**     of SOFA source code files is a "derived work" that must comply
**     with the following requirements:
**
**     a) Your work shall be marked or carry a statement that it
**        (i) uses routines and computations derived by you from
**        software provided by SOFA under license to you; and
**        (ii) does not itself constitute software provided by and/or
**        endorsed by SOFA.
**
**     b) The source code of your derived work must contain descriptions
**        of how the derived work is based upon, contains and/or differs
**        from the original SOFA software.
**
**     c) The names of all routines in your derived work shall not
**        include the prefix "iau" or "sofa" or trivial modifications
**        thereof such as changes of case.
**
**     d) The origin of the SOFA components of your derived work must
**        not be misrepresented;  you must not claim that you wrote the
**        original software, nor file a patent application for SOFA
**        software or algorithms embedded in the SOFA software.
**
**     e) These requirements must be reproduced intact in any source
**        distribution and shall apply to anyone to whom you have
**        granted a further right to modify the source code of your
**        derived work.
**
**     Note that, as originally distributed, the SOFA software is
**     intended to be a definitive implementation of the IAU standards,
**     and consequently third-party modifications are discouraged.  All
**     variations, no matter how minor, must be explicitly marked as
**     such, as explained above.
**
**  4. You shall not cause the SOFA software to be brought into
**     disrepute, either by misuse, or use for inappropriate tasks, or
**     by inappropriate modification.
**
**  5. The SOFA software is provided "as is" and SOFA makes no warranty
**     as to its use or performance.   SOFA does not and cannot warrant
**     the performance or results which the user may obtain by using the
**     SOFA software.  SOFA makes no warranties, express or implied, as
**     to non-infringement of third party rights, merchantability, or
**     fitness for any particular purpose.  In no event will SOFA be
**     liable to the user for any consequential, incidental, or special
**     damages, including any lost profits or lost savings, even if a
**     SOFA representative has been advised of such damages, or for any
**     claim by any third party.
**
**  6. The provision of any version of the SOFA software under the terms
**     and conditions specified herein does not imply that future
**     versions will also be made available under the same terms and
**     conditions.
*
**  In any published work or commercial product which uses the SOFA
**  software directly, acknowledgement (see www.iausofa.org) is
**  appreciated.
**
**  Correspondence concerning SOFA software should be addressed as
**  follows:
**
**      By email:  [email protected]
**      By post:   IAU SOFA Center
**                 HM Nautical Almanac Office
**                 UK Hydrographic Office
**                 Admiralty Way, Taunton
**                 Somerset, TA1 2DN
**                 United Kingdom
**
**--------------------------------------------------------------------*/

}
Exemple #3
0
int iauUtcut1(double utc1, double utc2, double dut1,
              double *ut11, double *ut12)
/*
**  - - - - - - - - - -
**   i a u U t c u t 1
**  - - - - - - - - - -
**
**  Time scale transformation:  Coordinated Universal Time, UTC, to
**  Universal Time, UT1.
**
**  This function is part of the International Astronomical Union's
**  SOFA (Standards of Fundamental Astronomy) software collection.
**
**  Status:  canonical.
**
**  Given:
**     utc1,utc2  double   UTC as a 2-part quasi Julian Date (Notes 1-4)
**     dut1       double   Delta UT1 = UT1-UTC in seconds (Note 5)
**
**  Returned:
**     ut11,ut12  double   UT1 as a 2-part Julian Date (Note 6)
**
**  Returned (function value):
**                int      status: +1 = dubious year (Note 3)
**                                  0 = OK
**                                 -1 = unacceptable date
**
**  Notes:
**
**  1) utc1+utc2 is quasi Julian Date (see Note 2), apportioned in any
**     convenient way between the two arguments, for example where utc1
**     is the Julian Day Number and utc2 is the fraction of a day.
**
**  2) JD cannot unambiguously represent UTC during a leap second unless
**     special measures are taken.  The convention in the present
**     function is that the JD day represents UTC days whether the
**     length is 86399, 86400 or 86401 SI seconds.
**
**  3) The warning status "dubious year" flags UTCs that predate the
**     introduction of the time scale or that are too far in the future
**     to be trusted.  See iauDat for further details.
**
**  4) The function iauDtf2d converts from calendar date and time of
**     day into 2-part Julian Date, and in the case of UTC implements
**     the leap-second-ambiguity convention described above.
**
**  5) Delta UT1 can be obtained from tabulations provided by the
**     International Earth Rotation and Reference Systems Service.
**     It is the caller's responsibility to supply a dut1 argument
**     containing the UT1-UTC value that matches the given UTC.
**
**  6) The returned ut11,ut12 are such that their sum is the UT1 Julian
**     Date.
**
**  References:
**
**     McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003),
**     IERS Technical Note No. 32, BKG (2004)
**
**     Explanatory Supplement to the Astronomical Almanac,
**     P. Kenneth Seidelmann (ed), University Science Books (1992)
**
**  Called:
**     iauJd2cal    JD to Gregorian calendar
**     iauDat       delta(AT) = TAI-UTC
**     iauUtctai    UTC to TAI
**     iauTaiut1    TAI to UT1
**
**  This revision:  2013 August 12
**
**  SOFA release 2015-02-09
**
**  Copyright (C) 2015 IAU SOFA Board.  See notes at end.
*/
{
   int iy, im, id, js, jw;
   double w, dat, dta, tai1, tai2;

/* Look up TAI-UTC. */
   if ( iauJd2cal(utc1, utc2, &iy, &im, &id, &w) ) return -1;
   js = iauDat ( iy, im, id, 0.0, &dat);
   if ( js < 0 ) return -1;

/* Form UT1-TAI. */
   dta = dut1 - dat;

/* UTC to TAI to UT1. */
   jw = iauUtctai(utc1, utc2, &tai1, &tai2);
   if ( jw < 0 ) {
      return -1;
   } else if ( jw > 0 ) {
      js = jw;
   }
   if ( iauTaiut1(tai1, tai2, dta, ut11, ut12) ) return -1;

/* Status. */
   return js;

/*----------------------------------------------------------------------
**
**  Copyright (C) 2015
**  Standards Of Fundamental Astronomy Board
**  of the International Astronomical Union.
**
**  =====================
**  SOFA Software License
**  =====================
**
**  NOTICE TO USER:
**
**  BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING SIX TERMS AND
**  CONDITIONS WHICH APPLY TO ITS USE.
**
**  1. The Software is owned by the IAU SOFA Board ("SOFA").
**
**  2. Permission is granted to anyone to use the SOFA software for any
**     purpose, including commercial applications, free of charge and
**     without payment of royalties, subject to the conditions and
**     restrictions listed below.
**
**  3. You (the user) may copy and distribute SOFA source code to others,
**     and use and adapt its code and algorithms in your own software,
**     on a world-wide, royalty-free basis.  That portion of your
**     distribution that does not consist of intact and unchanged copies
**     of SOFA source code files is a "derived work" that must comply
**     with the following requirements:
**
**     a) Your work shall be marked or carry a statement that it
**        (i) uses routines and computations derived by you from
**        software provided by SOFA under license to you; and
**        (ii) does not itself constitute software provided by and/or
**        endorsed by SOFA.
**
**     b) The source code of your derived work must contain descriptions
**        of how the derived work is based upon, contains and/or differs
**        from the original SOFA software.
**
**     c) The names of all routines in your derived work shall not
**        include the prefix "iau" or "sofa" or trivial modifications
**        thereof such as changes of case.
**
**     d) The origin of the SOFA components of your derived work must
**        not be misrepresented;  you must not claim that you wrote the
**        original software, nor file a patent application for SOFA
**        software or algorithms embedded in the SOFA software.
**
**     e) These requirements must be reproduced intact in any source
**        distribution and shall apply to anyone to whom you have
**        granted a further right to modify the source code of your
**        derived work.
**
**     Note that, as originally distributed, the SOFA software is
**     intended to be a definitive implementation of the IAU standards,
**     and consequently third-party modifications are discouraged.  All
**     variations, no matter how minor, must be explicitly marked as
**     such, as explained above.
**
**  4. You shall not cause the SOFA software to be brought into
**     disrepute, either by misuse, or use for inappropriate tasks, or
**     by inappropriate modification.
**
**  5. The SOFA software is provided "as is" and SOFA makes no warranty
**     as to its use or performance.   SOFA does not and cannot warrant
**     the performance or results which the user may obtain by using the
**     SOFA software.  SOFA makes no warranties, express or implied, as
**     to non-infringement of third party rights, merchantability, or
**     fitness for any particular purpose.  In no event will SOFA be
**     liable to the user for any consequential, incidental, or special
**     damages, including any lost profits or lost savings, even if a
**     SOFA representative has been advised of such damages, or for any
**     claim by any third party.
**
**  6. The provision of any version of the SOFA software under the terms
**     and conditions specified herein does not imply that future
**     versions will also be made available under the same terms and
**     conditions.
*
**  In any published work or commercial product which uses the SOFA
**  software directly, acknowledgement (see www.iausofa.org) is
**  appreciated.
**
**  Correspondence concerning SOFA software should be addressed as
**  follows:
**
**      By email:  [email protected]
**      By post:   IAU SOFA Center
**                 HM Nautical Almanac Office
**                 UK Hydrographic Office
**                 Admiralty Way, Taunton
**                 Somerset, TA1 2DN
**                 United Kingdom
**
**--------------------------------------------------------------------*/
}
int iauTaiutc(double tai1, double tai2, double *utc1, double *utc2)
/*
**  - - - - - - - - - -
**   i a u T a i u t c
**  - - - - - - - - - -
**
**  Time scale transformation:  International Atomic Time, TAI, to
**  Coordinated Universal Time, UTC.
**
**  This function is part of the International Astronomical Union's
**  SOFA (Standards of Fundamental Astronomy) software collection.
**
**  Status:  canonical.
**
**  Given:
**     tai1,tai2  double   TAI as a 2-part Julian Date (Note 1)
**
**  Returned:
**     utc1,utc2  double   UTC as a 2-part quasi Julian Date (Notes 1-3)
**
**  Returned (function value):
**                int      status: +1 = dubious year (Note 4)
**                                  0 = OK
**                                 -1 = unacceptable date
**
**  Notes:
**
**  1) tai1+tai2 is Julian Date, apportioned in any convenient way
**     between the two arguments, for example where tai1 is the Julian
**     Day Number and tai2 is the fraction of a day.  The returned utc1
**     and utc2 form an analogous pair, except that a special convention
**     is used, to deal with the problem of leap seconds - see the next
**     note.
**
**  2) JD cannot unambiguously represent UTC during a leap second unless
**     special measures are taken.  The convention in the present
**     function is that the JD day represents UTC days whether the
**     length is 86399, 86400 or 86401 SI seconds.  In the 1960-1972 era
**     there were smaller jumps (in either direction) each time the
**     linear UTC(TAI) expression was changed, and these "mini-leaps"
**     are also included in the SOFA convention.
**
**  3) The function iauD2dtf can be used to transform the UTC quasi-JD
**     into calendar date and clock time, including UTC leap second
**     handling.
**
**  4) The warning status "dubious year" flags UTCs that predate the
**     introduction of the time scale or that are too far in the future
**     to be trusted.  See iauDat for further details.
**
**  Called:
**     iauUtctai    UTC to TAI
**
**  References:
**
**     McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003),
**     IERS Technical Note No. 32, BKG (2004)
**
**     Explanatory Supplement to the Astronomical Almanac,
**     P. Kenneth Seidelmann (ed), University Science Books (1992)
**
**  This revision:  2013 September 12
**
**  SOFA release 2016-05-03
**
**  Copyright (C) 2016 IAU SOFA Board.  See notes at end.
*/
{
    int big1;
    int i, j;
    double a1, a2, u1, u2, g1, g2;


    /* Put the two parts of the TAI into big-first order. */
    big1 = ( tai1 >= tai2 );
    if ( big1 ) {
        a1 = tai1;
        a2 = tai2;
    } else {
        a1 = tai2;
        a2 = tai1;
    }

    /* Initial guess for UTC. */
    u1 = a1;
    u2 = a2;

    /* Iterate (though in most cases just once is enough). */
    for ( i = 0; i < 3; i++ ) {

        /* Guessed UTC to TAI. */
        j = iauUtctai(u1, u2, &g1, &g2);
        if ( j < 0 ) return j;

        /* Adjust guessed UTC. */
        u2 += a1 - g1;
        u2 += a2 - g2;
    }

    /* Return the UTC result, preserving the TAI order. */
    if ( big1 ) {
        *utc1 = u1;
        *utc2 = u2;
    } else {
        *utc1 = u2;
        *utc2 = u1;
    }

    /* Status. */
    return j;

    /*----------------------------------------------------------------------
    **
    **  Copyright (C) 2016
    **  Standards Of Fundamental Astronomy Board
    **  of the International Astronomical Union.
    **
    **  =====================
    **  SOFA Software License
    **  =====================
    **
    **  NOTICE TO USER:
    **
    **  BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING SIX TERMS AND
    **  CONDITIONS WHICH APPLY TO ITS USE.
    **
    **  1. The Software is owned by the IAU SOFA Board ("SOFA").
    **
    **  2. Permission is granted to anyone to use the SOFA software for any
    **     purpose, including commercial applications, free of charge and
    **     without payment of royalties, subject to the conditions and
    **     restrictions listed below.
    **
    **  3. You (the user) may copy and distribute SOFA source code to others,
    **     and use and adapt its code and algorithms in your own software,
    **     on a world-wide, royalty-free basis.  That portion of your
    **     distribution that does not consist of intact and unchanged copies
    **     of SOFA source code files is a "derived work" that must comply
    **     with the following requirements:
    **
    **     a) Your work shall be marked or carry a statement that it
    **        (i) uses routines and computations derived by you from
    **        software provided by SOFA under license to you; and
    **        (ii) does not itself constitute software provided by and/or
    **        endorsed by SOFA.
    **
    **     b) The source code of your derived work must contain descriptions
    **        of how the derived work is based upon, contains and/or differs
    **        from the original SOFA software.
    **
    **     c) The names of all routines in your derived work shall not
    **        include the prefix "iau" or "sofa" or trivial modifications
    **        thereof such as changes of case.
    **
    **     d) The origin of the SOFA components of your derived work must
    **        not be misrepresented;  you must not claim that you wrote the
    **        original software, nor file a patent application for SOFA
    **        software or algorithms embedded in the SOFA software.
    **
    **     e) These requirements must be reproduced intact in any source
    **        distribution and shall apply to anyone to whom you have
    **        granted a further right to modify the source code of your
    **        derived work.
    **
    **     Note that, as originally distributed, the SOFA software is
    **     intended to be a definitive implementation of the IAU standards,
    **     and consequently third-party modifications are discouraged.  All
    **     variations, no matter how minor, must be explicitly marked as
    **     such, as explained above.
    **
    **  4. You shall not cause the SOFA software to be brought into
    **     disrepute, either by misuse, or use for inappropriate tasks, or
    **     by inappropriate modification.
    **
    **  5. The SOFA software is provided "as is" and SOFA makes no warranty
    **     as to its use or performance.   SOFA does not and cannot warrant
    **     the performance or results which the user may obtain by using the
    **     SOFA software.  SOFA makes no warranties, express or implied, as
    **     to non-infringement of third party rights, merchantability, or
    **     fitness for any particular purpose.  In no event will SOFA be
    **     liable to the user for any consequential, incidental, or special
    **     damages, including any lost profits or lost savings, even if a
    **     SOFA representative has been advised of such damages, or for any
    **     claim by any third party.
    **
    **  6. The provision of any version of the SOFA software under the terms
    **     and conditions specified herein does not imply that future
    **     versions will also be made available under the same terms and
    **     conditions.
    *
    **  In any published work or commercial product which uses the SOFA
    **  software directly, acknowledgement (see www.iausofa.org) is
    **  appreciated.
    **
    **  Correspondence concerning SOFA software should be addressed as
    **  follows:
    **
    **      By email:  [email protected]
    **      By post:   IAU SOFA Center
    **                 HM Nautical Almanac Office
    **                 UK Hydrographic Office
    **                 Admiralty Way, Taunton
    **                 Somerset, TA1 2DN
    **                 United Kingdom
    **
    **--------------------------------------------------------------------*/
}