Port useful ERFA functions

[helgee]

A

• [x] a2af -> Util
• [ ] a2tf -> Util
• [x] ab -> Astrometry
• [x] af2a -> Util
• [X] ~anp~ -> mod2pi
• [X] anpm -> Util
• [ ] apcg -> Astrometry
• [ ] apcg13 -> Astrometry
• [ ] apci -> Astrometry
• [ ] apci13 -> Astrometry
• [ ] apco -> Astrometry
• [ ] apco13 -> Astrometry
• [ ] apcs -> Astrometry
• [ ] apcs13 -> Astrometry
• [ ] aper -> Astrometry
• [ ] aper13 -> Astrometry
• [ ] apio -> Astrometry
• [ ] apio13 -> Astrometry
• [ ] atci13 -> Astrometry
• [ ] atciq -> Astrometry
• [ ] atciqn -> Astrometry
• [ ] atciqz -> Astrometry
• [ ] atco13 -> Astrometry
• [ ] atic13 -> Astrometry
• [ ] aticq -> Astrometry
• [ ] aticqn -> Astrometry
• [ ] atio13 -> Astrometry
• [ ] atioq -> Astrometry
• [ ] atoc13 -> Astrometry
• [ ] atoi13 -> Astrometry
• [ ] atoiq -> Astrometry

  B

• [x] bi00 -> EarthAttitude
• [X] bp00 -> EarthAttitude
• [ ] bp06 -> EarthAttitude
• [X] bpn2xy -> EarthAttitude

  C

• [X] c2i00a -> EarthAttitude
• [X] c2i00b -> EarthAttitude
• [ ] c2i06a -> EarthAttitude
• [X] c2ibpn -> EarthAttitude
• [X] c2ixy -> EarthAttitude
• [X] c2ixys -> EarthAttitude
• [ ] c2s -> Util
• [X] c2t00a -> EarthAttitude
• [X] c2t00b -> EarthAttitude
• [ ] c2t06a -> EarthAttitude
• [x] c2tcio -> EarthAttitude
• [x] c2teqx -> EarthAttitude
• [X] c2tpe -> EarthAttitude
• [X] c2txy -> EarthAttitude
• [X] cal2jd -> AstroTime
• [X] ~cp~ -> unneeded
• [X] ~cpv~ -> unneeded
• [X] ~cr~ -> unneeded

  D

• [X] d2dtf -> AstroTime
• [ ] d2tf -> Util
• [X] dat -> LeapSeconds
• [X] dtdb -> AstroTime
• [X] dtf2d -> AstroTime

  E

• [ ] eceq06 -> Astrometry
• [ ] ecm06 -> EarthAttitude
• [X] ee00 -> EarthAttitude
• [X] ee00a -> EarthAttitude
• [X] ee00b -> EarthAttitude
• [X] ee06a -> EarthAttitude
• [X] eect00 -> EarthAttitude
• [ ] eform -> Util
• [ ] eo06a -> EarthAttitude
• [X] eors -> EarthAttitude
• [ ] epb -> AstroTime
• [ ] epb2jd -> AstroTime
• [ ] epj -> AstroTime
• [ ] epj2jd -> AstroTime
• [ ] epv00 -> Ephemerides
• [ ] eqec06 -> EarthAttitude
• [X] eqeq94 -> EarthAttitude
• [X] era00 -> EarthAttitude

  F

• [X] fad03 -> EarthAttitude
• [X] fae03 -> EarthAttitude
• [X] faf03 -> EarthAttitude
• [X] faju03 -> EarthAttitude
• [X] fal03 -> EarthAttitude
• [X] falp03 -> EarthAttitude
• [X] fama03 -> EarthAttitude
• [X] fame03 -> EarthAttitude
• [X] fane03 -> EarthAttitude
• [X] faom03 -> EarthAttitude
• [X] fapa03 -> EarthAttitude
• [X] fasa03 -> EarthAttitude
• [X] faur03 -> EarthAttitude
• [X] fave03 -> EarthAttitude
• [ ] fk52h -> Astrometry
• [ ] fk5hip -> Astrometry
• [ ] fk5hz -> Astrometry
• [X] fw2m -> EarthAttitude
• [ ] fw2xy -> EarthAttitude

  G

• [ ] g2icrs -> Astrometry
• [ ] gc2gd -> Util
• [ ] gc2gde -> Util
• [ ] gd2gc -> Util
• [ ] gd2gce -> Util
• [X] gmst00 -> EarthAttitude
• [X] gmst06 -> EarthAttitude
• [X] gmst82 -> EarthAttitude
• [X] gst00a -> EarthAttitude
• [X] gst00b -> EarthAttitude
• [X] gst06 -> EarthAttitude
• [X] gst06a -> EarthAttitude
• [X] gst94 -> EarthAttitude

  H

• [ ] h2fk5 -> Astrometry
• [ ] hfk5z -> Astrometry

  I

• [ ] icrs2g -> Astrometry
• [X] ~ir~ -> unneeded

  J

• [X] jd2cal -> AstroTime
• [X] jdcalf -> AstroTime

  L

• [ ] ld -> Astrometry
• [ ] ldn -> Astrometry
• [ ] ldsun -> Astrometry
• [ ] lteceq -> Astrometry
• [ ] ltecm -> EarthAttitude
• [ ] lteqec -> Astrometry
• [ ] ltp -> EarthAttitude
• [ ] ltpb -> EarthAttitude
• [ ] ltpecl -> EarthAttitude
• [ ] ltpequ -> EarthAttitude

  N

• [X] num00a -> EarthAttitude
• [X] num00b -> EarthAttitude
• [X] num06a -> EarthAttitude
• [X] numat -> EarthAttitude
• [X] nut00a -> EarthAttitude
• [X] nut00b -> EarthAttitude
• [X] nut06a -> EarthAttitude
• [X] nut80 -> EarthAttitude
• [X] nutm80 -> EarthAttitude

  O

• [X] obl06 -> EarthAttitude
• [X] obl80 -> EarthAttitude

  P

• [ ] p06e -> EarthAttitude
• [X] ~p2pv~ -> unneeded
• [ ] p2s -> Util
• [ ] pap -> Util
• [ ] pas -> Util
• [ ] pb06 -> EarthAttitude
• [X] ~pdp~ -> unneeded
• [X] pfw06 -> EarthAttitude
• [X] plan94 -> Ephemerides
• [X] ~pm~ -> unneeded
• [ ] pmat00 -> EarthAttitude
• [ ] pmat06 -> EarthAttitude
• [ ] pmat76 -> EarthAttitude
• [X] ~pmp~ -> unneeded
• [ ] pmpx -> Astrometry
• [ ] pmsafe -> Astrometry
• [X] ~pn~ -> unneeded
• [X] pn00 -> EarthAttitude
• [X] pn00a -> EarthAttitude
• [X] pn00b -> EarthAttitude
• [ ] pn06 -> EarthAttitude
• [ ] pn06a -> EarthAttitude
• [X] pnm00a -> EarthAttitude
• [X] pnm00b -> EarthAttitude
• [X] pnm06a -> EarthAttitude
• [ ] pnm80 -> EarthAttitude
• [X] pom00 -> EarthAttitude
• [X] ~ppp~ -> a + b
• [X] ~ppsp~ -> unneeded
• [X] pr00 -> EarthAttitude
• [ ] prec76 -> EarthAttitude
• [X] ~pv2p~ -> unneeded
• [ ] pv2s -> Util
• [X] ~pvdpv~ -> unneeded
• [X] ~pvm~ -> unneeded
• [X] ~pvmpv~ -> unneeded
• [X] ~pvppv~ -> unneeded
• [ ] pvstar -> Astrometry
• [ ] pvtob -> EarthAttitude
• [X] ~pvu~ -> unneeded
• [X] ~pvup~ -> unneeded
• [X] ~pvxpv~ -> unneeded
• [X] ~pxp~ -> unneeded

  R

• [ ] refco -> Astrometry
• [ ] rm2v -> Util
• [ ] rv2m -> Util
• [X] ~rx~ -> unneeded
• [X] ~rxp~ -> unneeded
• [X] ~rxpv~ -> unneeded
• [X] ~rxr~ -> unneeded
• [X] ~ry~ -> unneeded
• [X] ~rz~ -> unneeded

  S

• [X] s00 -> EarthAttitude
• [X] s00a -> EarthAttitude
• [X] s00b -> EarthAttitude
• [X] s06 -> EarthAttitude
• [X] s06a -> EarthAttitude
• [x] s2c -> Util
• [ ] s2p -> Util
• [ ] s2pv -> Util
• [X] ~s2xpv~ -> unneeded
• [ ] sepp -> Util
• [ ] seps -> Util
• [X] sp00 -> EarthAttitude
• [ ] starpm -> Astrometry
• [ ] starpv -> Astrometry
• [X] ~sxp~ -> unneeded
• [X] ~sxpv~ -> unneeded

  T

• [X] ~taitt~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~taiut1~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~taiutc~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~tcbtdb~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~tcgtt~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~tdbtcb~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~tdbtt~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [ ] tf2a -> Util
• [ ] tf2d -> Util
• [X] ~tr~ -> unneeded
• [X] ~trxp~ -> unneeded
• [X] ~trxpv~ -> unneeded
• [X] ~tttai~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~tttcg~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~tttdb~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~ttut1~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1

  U

• [X] ~ut1tai~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~ut1tt~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~ut1utc~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~utctai~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1
• [X] ~utcut1~ -> https://github.com/JuliaAstro/AstronomicalTime.jl/issues/1

  X

• [X] xy06 -> EarthAttitude
• [X] xys00a -> EarthAttitude
• [X] xys00b -> EarthAttitude
• [ ] xys06a -> EarthAttitude

  Z

• [X] ~zp~ -> unneeded
• [X] ~zpv~ -> unneeded
• [X] ~zr~ -> unneeded

[helgee]

Hey @matzipan, I have pruned the list and indicated in which submodule each function should go. If you want to have a shot at it 😉

[matzipan]

So I've been looking at a2af, and I see there's already rad2dms in Util.jl. Should I create a duplicate implementation? Should I change the return to also include a fraction variable?

[helgee]

Maybe start with duplicates to get your bearings and then we can see how to merge them together. In the end, most things in the library are still in flux right now.