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<p>Hi Jan,</p>
<p>This is great. If you can point me to a copy of the ephemeris
file I can update the calcServer in gitlab.</p>
<p>Cheers,</p>
<p>Walter<br>
</p>
<div class="moz-cite-prefix">On 1/28/25 01:25, Jan Wagner wrote:<br>
</div>
<blockquote type="cite" cite="mid:CABEA3toAXGyOtP8KgVR5T4C_+-8kcEy6wNJ8oxonJ9W+NAKNaw@mail.gmail.com">
<div dir="ltr">
<div dir="ltr">Hi David,<br>
<br>
interesting to hear about the internals, esp. that the record
lengths of DE403 and DE421 are identical. Apparently, data
structures are, too. I did not expect DE403/DE421 files to be
interchangeable in terms of structure.</div>
<div dir="ltr"><br>
"Can you try the calc9 server as is using DE421?" -->
Indeed, that fixed it! Wow.<br>
<br>
Now VLBI track m25020 of 20th January 2025 works under
calcif2. As does a copy of m25020 shifted to year 2045.</div>
<div dir="ltr"><br>
The steps were:<br>
<br>
cd $DIFXROOT/share/CalcServer/<br>
cp $DIFXROOT/share/difxcalc/DE421_little_Endian .<br>
mv JPLEPH DE403_little_Endian<br>
ln -s DE421_little_Endian JPLEPH<br>
startCalcServer<br>
<br>
It's a bit ridiculous that it was actually that simple! :P<br>
<br>
Many thanks again!!<br>
<br>
Kind regards,<br>
Jan</div>
<br>
<div class="gmail_quote gmail_quote_container">
<div dir="ltr" class="gmail_attr">On Thu, Jan 23, 2025 at
9:33 PM Gordon, David CIV USN NAVOBSY DC (USA) <<a href="mailto:david.gordon126.civ@us.navy.mil" moz-do-not-send="true" class="moz-txt-link-freetext">david.gordon126.civ@us.navy.mil</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Jan,<br>
<br>
The record lengths (8144 bytes) appear to be the same for
DE403 and DE421.<br>
I put together a short program using the relevant
subroutines from the calc9<br>
version of cpepu.f and ran it with the DE421 ephemeris. It
ran with no problems.<br>
DE421 seems to be good up to Jan. 2, 2050. Can you try the
calc9 server as is<br>
using DE421?<br>
<br>
If that doesn't work I think I can make a new DE403 file
with data from 1900<br>
to 2100. I think JPL may have made some changes in DE403
since I originally<br>
made a binary version around 26+ years ago. I recall ascii
files being in chunks<br>
of 25 years. Now they are 100 years. And the record length
may have been<br>
7144 bytes. John Benson may have made the file you have
sometime later<br>
with the larger record lengths. Or whatever. Let me know how
things go.<br>
<br>
David<br>
<br>
</blockquote>
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