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 |