Re: New JPL Format for Horizons Ephemeris #APCC - Format Causes Issue #APCC


fd@...
 
Edited

I am having the same problem.
I get the same error message "Apparent Alt/Elevation not found in ephemeris data".

The data IS there:

*****************************************************************************************************************************************************************************************************************************************************************
 Date__(UT)__HR:MN     R.A._____(ICRF)_____DEC  R.A.__(a-apparent)__DEC  dRA*cosD d(DEC)/dt  Azi____(a-app)___Elev  L_Ap_Sid_Time    APmag   S-brt             delta      deldot     S-O-T /r     S-T-O  Sky_motion  Sky_mot_PA  RelVel-ANG  Lun_Sky_Brt  sky_SNR
*****************************************************************************************************************************************************************************************************************************************************************
$$SOE
 2021-Nov-18 00:00 Cm  02 37 26.16 +12 30 48.6  02 38 37.76 +12 36 30.4  1720.045  820.0817   77.457834   5.983739  20 15 15.9215  -12.254   3.718  0.00269079633233  -0.2631059  165.1214 /T   14.8384   31.759023   64.509161   -14.28441         n.a.     n.a.
 2021-Nov-18 00:04 Cm  02 37 33.96 +12 31 43.5  02 38 45.57 +12 37 25.0  1711.117  820.3118   78.179302   6.602058  2
I noticed that the current header says "Azi____(a-app)___Elev"

but an old ephemerides (from 2020-11-10) uses the header "Azi_(a-appr)_Elev"

Maybe that throws HORIZONS off?

Any idea of when a new version of Horizons will be out (or ready for testing)?

+++++++++++++++++++++++++++++++++++++++

EDIT - I made it work

  • I downloaded the data from JPL. 
  • As Ray mentioned, could not CTRL-A,CTRL-C. I had do manually select and copy the ephemerides data to the clipboard.
  • I pasted the data from the clipboard into Notepad++. (Notepad also works)
  • Then on line 69 of the file I replaced "Azi____(a-app)___Elev" with "Azi_(a-appr)_Elev"  (ignore the quotes).
  • Then I saved the .txt file.
  • Horizons could read the .txt file with no errors.
  • I saved the file in Horizons, to give it the default .eph extension.
  • Success!



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