helpkepler - Support: sr #107544, ELP2000-82B not matching values

 
 

sr #107544: ELP2000-82B not matching values

Submitted by:  None
Submitted on:  Tue 07 Dec 2010 11:33:04 AM UTC
 
Category:  None Priority:  5 - Normal
Severity:  3 - Normal Status:  None
Privacy:  Public Assigned to:  None
Originator Email:  -email is unavailable- Open/Closed:  Open
Operating System:  Microsoft Windows
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Tue 07 Dec 2010 11:33:04 AM UTC, original submission:  

Hi,

I've used your routine, ELP2000-82B to calculate several values for the Moon. The program results are not quite the same as the given by the ftp server of IMCCE (program test1.exe). However, Here are the numbers for JD=2448724.5:

IMCCE:
X = -252119,06106 km
Y =  267821,11903 km
Z = -20748,12777 km
DIS = SQRT( X^2 + Y^2 + Z^2 ) = 368405,56124225 km
LON = ATN2 (X,Y) - PI = 2,32600392668343 rad
LAT = ATN(Z / SQRT( X^2 + Y^2)) = -5,634852939884979E-02 rad

Yours:
LON = 2,32600392648042 rad
LAT =-5,63602113497991E-02 rad
DIS = 368405,5616255 rad
X = -252118,895114744 km
Y =  267820,942858563 km
Z = -20752,424655222 km

As you can see there's a big difference - specially in the Z coordinate.

Can you please check this out? I would apreciate it very much.

Sorry to bother you.

Kind regards,

JKepler

Anonymous

 

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