Routines - abrudana/wwa GitHub Wiki

Calendars

CAL2JD Gregorian calendar to Julian Day number
EPB Julian Date to Besselian Epoch
EPB2JD Besselian Epoch to Julian Date
EPJ Julian Date to Julian Epoch
EPJ2JD Julian Epoch to Julian Date
JD2CAL Julian Date to Gregorian year, month, day, fraction
JDCALF Julian Date to Gregorian date for formatted output

Astrometry

AB apply stellar aberration
APCG prepare for ICRS <→ GCRS, geocentric, special
APCG13 prepare for ICRS <→ GCRS, geocentric
APCI prepare for ICRS <→ CIRS, terrestrial, special
APCI13 prepare for ICRS <→ CIRS, terrestrial
APCO prepare for ICRS <→ observed, terrestrial, special
APCO13 prepare for ICRS <→ observed, terrestrial
APCS prepare for ICRS <→ CIRS, space, special
APCS13 prepare for ICRS <→ CIRS, space
APER insert ERA into context
APER13 update context for Earth rotation
APIO prepare for CIRS <→ observed, terrestrial, special
APIO13 prepare for CIRS <→ observed, terrestrial
ATCI13 catalog → CIRS
ATCIQ quick ICRS → CIRS
ATCIQN quick ICRS → CIRS, multiple deflections
ATCIQZ quick astrometric ICRS → CIRS
ATCO13 ICRS → observed
ATIC13 CIRS → ICRS
ATICQ quick CIRS → ICRS
ATCIQN quick CIRS → ICRS, multiple deflections
ATIO13 CIRS → observed
ATIOQ quick CIRS → observed
ATOC13 observed → astrometric ICRS
ATOI13 observed → CIRS
ATOIQ quick observed → CIRS
LD light deflection by a single solar-system body
LDN light deflection by multiple solar-system bodies
LDSUN light deflection by the Sun
PMPX apply proper motion and parallax
PVTOB observatory position and velocity
REFCO refraction constants
PMSAFE apply proper motion, with zero-parallax precautions
STARPM apply proper motion

Time scales

D2DTF format 2-part JD for output
DAT Delta(AT) (=TAI-UTC) for a given UTC date
DTDB TDB-TT
DTF2D encode time and date fields into 2-part JD
TAITT TAI to TT
TAIUT1 TAI to UT1
TAIUTC TAI to UTC
TCBTDB TCB to TDB
TCGTT TCG to TT
TDBTCB TDB to TCB
TDBTT TDB to TT
TTTAI TT to TAI
TTTCG TT to TCG
TTTDB TT to TDB
TTUT1 TT to UT1
UT1TAI UT1 to TAI
UT1TT UT1 to TT
UT1UTC UT1 to UTC
UTCTAI UTC to TAI
UTCUT1 UTC to UT1

Earth rotation angle and sidereal time

EE00 equation of the equinoxes, IAU 2000
EE00A equation of the equinoxes, IAU 2000A
EE00B equation of the equinoxes, IAU 2000B
EE06A equation of the equinoxes, IAU 2006/2000A
EECT00 equation of the equinoxes complementary terms, IAU 2000
EQEQ94 equation of the equinoxes, IAU 1994
ERA00 Earth rotation angle, IAU 2000
GMST00 Greenwich mean sidereal time, IAU 2000
GMST06 Greenwich mean sidereal time, IAU 2006
GMST82 Greenwich mean sidereal time, IAU 1982
GST00A Greenwich apparent sidereal time, IAU 2000A
GST00B Greenwich apparent sidereal time, IAU 2000B
GST06 Greenwich apparent ST, IAU 2006, given NPB matrix
GST06A Greenwich apparent sidereal time, IAU 2006/2000A
GST94 Greenwich apparent sidereal time, IAU 1994

Ephemerides (limited precision)

EPV00 Earth position and velocity
PLAN94 major-planet position and velocity

Precession, nutation, polar motion

BI00 frame bias components, IAU 2000
BP00 frame bias and precession matrices, IAU 2000
BP06 frame bias and precession matrices, IAU 2006
BPN2XY extract CIP X,Y coordinates from NPB matrix
C2I00A celestial-to-intermediate matrix, IAU 2000A
C2I00B celestial-to-intermediate matrix, IAU 2000B
C2I06A celestial-to-intermediate matrix, IAU 2006/2000A
C2IBPN celestial-to-intermediate matrix, given NPB matrix, IAU 2000
C2IXY celestial-to-intermediate matrix, given X,Y, IAU 2000
C2IXYS celestial-to-intermediate matrix, given X,Y and s
C2T00A celestial-to-terrestrial matrix, IAU 2000A
C2T00B celestial-to-terrestrial matrix, IAU 2000B
C2T06A celestial-to-terrestrial matrix, IAU 2006/2000A
C2TCIO form CIO-based celestial-to-terrestrial matrix
C2TEQX form equinox-based celestial-to-terrestrial matrix
C2TPE celestial-to-terrestrial matrix given nutation, IAU 2000
C2TXY celestial-to-terrestrial matrix given CIP, IAU 2000
EO06A equation of the origins, IAU 2006/2000A
EORS equation of the origins, given NPB matrix and s
FW2M Fukushima-Williams angles to r-matrix
FW2XY Fukushima-Williams angles to X,Y
NUM00A nutation matrix, IAU 2000A
NUM00B nutation matrix, IAU 2000B
NUM06A nutation matrix, IAU 2006/2000A
NUMAT form nutation matrix
NUT00A nutation, IAU 2000A
NUT00B nutation, IAU 2000B
NUT06A nutation, IAU 2006/2000A
NUT80 nutation, IAU 1980
NUTM80 nutation matrix, IAU 1980
OBL06 mean obliquity, IAU 2006
OBL80 mean obliquity, IAU 1980
PB06 zeta,z,theta precession angles, IAU 2006, including bias
PFW06 bias-precession Fukushima-Williams angles, IAU 2006
PMAT00 precession matrix (including frame bias), IAU 2000
PMAT06 PB matrix, IAU 2006
PMAT76 precession matrix, IAU 1976
PN00 bias/precession/nutation results, IAU 2000
PN00A bias/precession/nutation, IAU 2000A
PN00B bias/precession/nutation, IAU 2000B
PN06 bias/precession/nutation results, IAU 2006
PN06A bias/precession/nutation results, IAU 2006/2000A
PNM00A classical NPB matrix, IAU 2000A
PNM00B classical NPB matrix, IAU 2000B
PNM06A classical NPB matrix, IAU 2006/2000A
PNM80 precession/nutation matrix, IAU 1976/1980
P06E precession angles, IAU 2006, equinox based
POM00 polar motion matrix
PR00 IAU 2000 precession adjustments
PREC76 accumulated precession angles, IAU 1976
S00 the CIO locator s, given X,Y, IAU 2000A
S00A the CIO locator s, IAU 2000A
S00B the CIO locator s, IAU 2000B
S06 the CIO locator s, given X,Y, IAU 2006
S06A the CIO locator s, IAU 2006/2000A
SP00 the TIO locator s’, IERS 2003
XY06 CIP, IAU 2006/2000A, from series
XYS00A CIP and s, IAU 2000A
XYS00B CIP and s, IAU 2000B
XYS06A CIP and s, IAU 2006/2000A

Fundamental arguments for nutation etc.

FAD03 mean elongation of the Moon from the Sun
FAE03 mean longitude of Earth
FAF03 mean argument of the latitude of the Moon
FAJU03 mean longitude of Jupiter
FAL03 mean anomaly of the Moon
FALP03 mean anomaly of the Sun
FAMA03 mean longitude of Mars
FAME03 mean longitude of Mercury
FANE03 mean longitude of Neptune
FAOM03 mean longitude of the Moon’s ascending node
FAPA03 general accumulated precession in longitude
FASA03 mean longitude of Saturn
FAUR03 mean longitude of Uranus
FAVE03 mean longitude of Venus

Star space motion

PVSTAR space motion pv-vector to star catalog data
STARPV star catalog data to space motion pv-vector

Star catalog conversions

FK52H transform FK5 star data into the Hipparcos system
FK5HIP FK5 to Hipparcos rotation and spin
FK5HZ FK5 to Hipparcos assuming zero Hipparcos proper motion
H2FK5 transform Hipparcos star data into the FK5 system
HFK5Z Hipparcos to FK5 assuming zero Hipparcos proper motion

Galactic coordinates

G2ICRS transform IAU 1958 galactic coordinates to ICRS
ICRS2G transform ICRS coordinates to IAU 1958 Galactic

Geodetic/geocentric

EFORM a,f for a nominated Earth reference ellipsoid
GC2GD geocentric to geodetic for a nominated ellipsoid
GC2GDE geocentric to geodetic given ellipsoid a,f
GD2GC geodetic to geocentric for a nominated ellipsoid
GD2GCE geodetic to geocentric given ellipsoid a,f

Obsolete

C2TCEO former name of C2TCIO