| FUNCTION |
PURPOSE |
| slaAddet | add E-terms of aberration |
| slaAfin | sexagesimal character string to angle |
| slaAirmas | air mass |
| slaAltaz | velocities etc. for altazimuth mount |
| slaAmp | apparent to mean |
| slaAmpqk | quick apparent to mean |
| slaAop | apparent to observed |
| slaAoppa | apparent-to-observed parameters |
| slaAoppat | update apparent-to-observed parameters |
| slaAopqk | quick apparent to observed |
| slaAtmdsp | atmospheric dispersion |
| slaAv2m | rotation matrix from axial vector |
| slaBear | direction between points on a sphere |
| slaC2i | ICRS to CIRS |
| slaC2ipa | ICRS to CIRS parameters |
| slaC2ipad | make ICRS to CIRS parameters stop at GCRS |
| slaC2ipas | ICRS to CIRS parameters, space observer |
| slaC2iqk | quick ICRS to CIRS |
| slaC2iqkz | quick ICRS to CIRS, no P.M. etc. |
| slaCaf2r | deg,arcmin,arcsec to radians |
| slaCaldj | calendar date to MJD |
| slaCalyd | calendar date to year,day |
| slaCc2s | Cartesian to spherical |
| slaCc62s | Cartesian 6-vector to spherical |
| slaCd2tf | days to hour,min,sec |
| slaCldj | calendar date to MJD |
| slaClyd | calendar date to year,day |
| slaCombn | next combination |
| slaCr2af | radians to deg,arcmin,arcsec |
| slaCr2tf | radians to hour,min,sec |
| slaCs2c | spherical to Cartesian |
| slaCs2c6 | spherical position and velocity to Cartesian |
| slaCtf2d | hour,min,sec to days |
| slaCtf2r | hour,min,sec to radians |
| slaDaf2r | deg,arcmin,arcsec to radians |
| slaDafin | sexagesimal character string to angle |
| slaDat | TAI-UTC |
| slaDav2m | rotation matrix from axial vector |
| slaDbear | direction between points on a sphere |
| slaDbjin | decode string to B/J epoch |
| slaDc62s | Cartesian 6-vector to spherical |
| slaDcc2s | Cartesian to spherical |
| slaDcmpf | interpret linear fit |
| slaDcs2c | spherical to Cartesian |
| slaDd2tf | days to hour,min,sec |
| slaDe2h | [HA,Dec] to [Az,El] |
| slaDeuler | Euler angles to rotation matrix |
| slaDfltin | decode a double precision number |
| slaDh2e | [Az,El] to [HA,Dec] |
| slaDimxv | apply 3D reverse rotation |
| slaDjcal | MJD to Gregorian for output |
| slaDjcl | MJD to year,month,day,frac |
| slaDm2av | rotation matrix to axial vector |
| slaDmat | solve simultaneous equations |
| slaDmoon | approximate Moon position and velocity |
| slaDmxm | product of two 3x3 matrices |
| slaDmxv | apply 3D rotation |
| slaDpav | position-angle between two directions |
| slaDr2af | radians to deg,min,sec,frac |
| slaDr2tf | radians to hour,min,sec,frac |
| slaDrange | put angle into range +/-pi |
| slaDranrm | put angle into range 0-2pi |
| slaDs2c6 | spherical position and velocity to Cartesian |
| slaDs2tp | spherical to tangent plane |
| slaDsep | angle between two points on a sphere |
| slaDsepv | angle between two vectors |
| slaDt | approximate ET minus UT |
| slaDtf2d | hour,min,sec to days |
| slaDtf2r | hour,min,sec to radians |
| slaDtp2s | tangent plane to spherical |
| slaDtp2v | tangent plane to [x,y,z] |
| slaDtps2c | plate centre from [xi,eta] and [RA,Dec] |
| slaDtpv2c | plate centre from [xi,eta] and [x,y,z] |
| slaDtt | TT minus UTC |
| slaDv2tp | [x,y,z] to tangent plane |
| slaDvdv | scalar product |
| slaDvn | normalize vector |
| slaDvxv | vector product |
| slaE2h | [HA,Dec] to [Az,El] |
| slaEarth | approximate Earth position and velocity |
| slaEcleq | ecliptic to equatorial |
| slaEcmat | form [RA,Dec] -> [lambda,beta] matrix |
| slaEcor | radial velocity & light-time corrections to Sun |
| slaEg50 | B1950 [RA,Dec] to [LII,BII] |
| slaEl2ue | conventional to universal elements |
| slaEo | equation of the origins. |
| slaEors | EO from NPB matrix and s |
| slaEpb | MJD to Besselian epoch |
| slaEpb2d | Besselian epoch to MJD |
| slaEpco | convert epoch to B or J |
| slaEpj | MJD to Julian epoch |
| slaEpj2d | Julian epoch to MJD |
| slaEpv | Earth position & velocity (high accuracy) |
| slaEqecl | J2000 [RA,Dec] to [lambda,beta] |
| slaEqeqx | equation of the equinoxes |
| slaEqgal | J2000 [RA,Dec] to [LII,BII] |
| slaEra | Earth rotation angle |
| slaEtrms | E-terms of aberration |
| slaEuler | rotation matrix from Euler angles |
| slaEvp | Earth position & velocity |
| slaFitxy | fit linear model to two [x,y] sets |
| slaFk425 | FK4 to FK5 |
| slaFk45z | FK4 to FK5, no proper motion or parallax |
| slaFk524 | FK5 to FK4 |
| slaFk52h | FK5 to Hipparcos |
| slaFk54z | FK5 to FK4, no proper motion or parallax |
| slaFk5hz | FK5 to Hipparcos, no proper motion |
| slaFlotin | decode a single-precision real number |
| slaFw2m | rotation matrix from F-W angles |
| slaFw2xy | CIP X,Y given F-W NPB angles. |
| slaG2ixys | GCRS to CIRS matrix given [X,Y,s] |
| slaGaleq | galactic to J2000 [RA,Dec] |
| slaGalsup | galactic to supergalactic |
| slaGe50 | galactic to B1950 [RA,Dec] |
| slaGeoc | geodetic to geocentric |
| slaGmst | UT to GMST |
| slaGmsta | UT to GMST (extra precision) |
| slaGst | GST (from ERA and EO) |
| slaH2e | [Az,El] to [HA,Dec] |
| slaH2fk5 | Hipparcos to FK5 |
| slaHfk5z | Hipparcos to FK5, no proper motion |
| slaI2c | CIRS to ICRS |
| slaI2cqk | quick CIRS to ICRS |
| slaI2o | CIRS to observed place |
| slaI2opa | CIRS-to-observed parameters |
| slaI2opad | in CIRS-to-observed, disable diurnal aberration |
| slaI2opat | update CIRS-to-observed parameters |
| slaI2oqk | quick CIRS to observed place |
| slaImxv | apply 3D reverse rotation |
| slaInt2in | decode an integer number |
| slaIntin | decode a long integer number |
| slaInvf | invert linear model |
| slaKbj | select epoch prefix |
| slaM2av | rotation matrix to axial vector |
| slaMap | mean to apparent |
| slaMappa | mean to apparent parameters |
| slaMapqk | quick mean to apparent |
| slaMapqkz | quick mean to apparent, no P.M. etc. |
| slaMoon | approximate Moon position and velocity |
| slaMxm | product of two 3x3 matrices |
| slaMxv | apply 3D rotation |
| slaNu | nutation components, IAU 2006 |
| slaNu00a | nutation, IAU 2000A |
| slaNut | nutation matrix |
| slaNutc | nutation components |
| slaNutc80 | nutation components, IAU 1980 |
| slaO2i | observed place to CIRS |
| slaO2iqk | quick observed place to CIRS |
| slaOap | observed to apparent |
| slaOapqk | quick observed to apparent |
| slaObs | observatory parameters |
| slaPa | [HA,Dec] to parallactic angle |
| slaPav | position-angle between two directions |
| slaPcd | apply radial distortion |
| slaPda2h | hour angle for a given azimuth |
| slaPdq2h | hour angle for a given parallactic angle |
| slaPermut | next permutation |
| slaPertel | perturbed orbital elements |
| slaPertue | perturbed universal elements |
| slaPfw | IAU 2006 precession angles |
| slaPlanel | planet position from elements |
| slaPlanet | planetary ephemerides, approximate |
| slaPlante | [RA,Dec] of planet from elements |
| slaPlantu | [RA,Dec] from universal elements |
| slaPm | proper motion |
| slaPncio | CIO based NPB matrix |
| slaPneqx | equinox based NPB matrix |
| slaPolmo | polar motion |
| slaPomom | polar motion matrix |
| slaPrebn | precession matrix (FK4) |
| slaPrec | precession matrix (IAU 1976) |
| slaPreces | precession |
| slaPrecl | precession matrix (more accurate) |
| slaPrenut | precession-nutation matrix |
| slaPv2el | orbital elements from position & velocity |
| slaPv2ue | position and velocity to universal elements |
| slaPvobs | observatory position & velocity |
| slaPxy | apply linear model |
| slaRange | put angle into range +/-pi |
| slaRanorm | put angle into range 0-2pi |
| slaRcc | barycentric coordinate time |
| slaRdplan | apparent [RA,Dec] of planet |
| slaRefco | refraction constants |
| slaRefcoq | refraction constants (fast) |
| slaRefro | refraction |
| slaRefv | apply refraction to vector |
| slaRefz | apply refraction to ZD |
| slaRverot | radial velocity correction to Earth centre |
| slaRvgalc | radial velocity correction to galactic centre |
| slaRvlg | radial velocity correction to local group |
| slaRvlsrd | radial velocity correction to dynamical LSR |
| slaRvlsrk | radial velocity correction to kinematical LSR |
| slaS | the CIO locator s |
| slaS2tp | spherical to tangent plane |
| slaSep | angle between two points on sphere |
| slaSepv | angle between two vectors |
| slaSmat | solve simultaneous equations |
| slaSp | the CIO locator s' |
| slaSubet | remove E-terms |
| slaSupgal | supergalactic to galactic |
| slaSvd | singular value decomposition |
| slaSvdcov | covariance matrix from SVD |
| slaSvdsol | solution vector from SVD |
| slaTp2s | tangent plane to spherical |
| slaTp2v | tangent plane to [x,y,z] |
| slaTps2c | plate centre from [xi,eta] and [RA,Dec] |
| slaTpv2c | plate centre from [xi,eta] and [x,y,z] |
| slaUe2el | universal to conventional elements |
| slaUe2pv | position & velocity from universal elements |
| slaUnpcd | remove radial distortion |
| slaV2tp | [x,y,z] to tangent plane |
| slaVdv | scalar product |
| slaVn | normalize vector |
| slaVxv | vector product |
| slaXy2xy | apply linear model to an [x,y] |
| slaZd | [HA,Dec] to zenith distance |