TLEs in Skymap and Cartes

I hope someone can help me, I'm totally baffled.

I'm trying to predict ISS passes in Cartes de Ciel, using Celestrak tle s

ISS (ZARYA)
1 25544U 98067A 04090.16719616 .00030427 00000-0 27748-3 0 4712
2 25544 51.6300 8.3805 0011039 335.3696 173.2124 15.67542288305916

The reason I'm not using Mike Mcann's, as recommended, is that as far as I
can see, he does not include ISS in his files; if he does it's under
another name, but I get no results that match heavens-above predictions of
ISS passes.

But if I use this tle in skymap 9, it *does* give matching results to
heavens-above.

If in Cartes I allow daytime predictions of this tle, I get a load of
passes that are nothing like the heavens-above predictions, so *something*
is getting processed.

Should not both progs give the same answers for the same tle?, or is there
a different sort of tle for a different decoding method.

I'm sure I used to use Celestrak satellite tles in Cartes, before I
upgraded to 2.75.1?

I have no idea what to try next - could anyone advise, please?

mike r

mike ring nous a écrit :

I hope someone can help me, I'm totally baffled.

I'm trying to predict ISS passes in Cartes de Ciel, using Celestrak
tle s

ISS (ZARYA)
1 25544U 98067A 04090.16719616 .00030427 00000-0 27748-3 0 4712
2 25544 51.6300 8.3805 0011039 335.3696 173.2124 15.67542288305916

The reason I'm not using Mike Mcann's, as recommended, is that as far
as I can see, he does not include ISS in his files; if he does it's
under another name, but I get no results that match heavens-above
predictions of ISS passes.

But if I use this tle in skymap 9, it *does* give matching results to
heavens-above.

If in Cartes I allow daytime predictions of this tle, I get a load of
passes that are nothing like the heavens-above predictions, so
*something* is getting processed.

Should not both progs give the same answers for the same tle?, or is
there a different sort of tle for a different decoding method.

I don't know many sorts of tle's, just one
I use the tle's from Celestrak with Cartes, and I get the same results as
Heavens-Above.

I'm sure I used to use Celestrak satellite tles in Cartes, before I
upgraded to 2.75.1?

As I use the same version 2.75.1 as you do, and I get good results, I
suggest that you verify the coordinates of your observatory, and your local
time in Cartes.

--
Norbert. (no X for the answer)
======================================
knowing the universe - stellar and galaxies evolution
http://nrumiano.free.fr
images of the sky http://images.ciel.free.fr
======================================

"Norbert" wrote in
:

I'm sure I used to use Celestrak satellite tles in Cartes, before I
upgraded to 2.75.1?

As I use the same version 2.75.1 as you do, and I get good results, I
suggest that you verify the coordinates of your observatory, and your
local time in Cartes.


D'OH!

I knew I was going to look like a wally, and I do.

My latitude and longitude had set themselves to zero.

I've no idea how that happened, I thought the default was Geneva! But I had
assumed the upgrade would preserve my settings - it did preserve the name!

Any how, you've solved it for me, so many thanks, Norbert

mike r