Re: Observation data of NOAA (-15,-18,-19) and the ISS available?

From: Andreas Hornig via Seesat-l <>
Date: Mon, 30 Apr 2018 01:48:35 +0200
Hi everyone,

I am one of Jorge's google summer of code mentors. He is working on an
extension of the OrbitDeterminator with this idea set[0].
I will answer more in between your text, but as a...

We would like to coordinate a team event when you and we are capturing the
same satellite but with your optical and our radio frequency pseudoranging
methods, so that we will be able to compare the results and also to combine
both ways to increase precision :).


On Sat, Apr 28, 2018 at 12:14 PM, Björn Gimle via Seesat-l <> wrote:

> Hello Jorge !
> An open source satellite  program might be useful , but otherwise I agree
> with Charles Phillips. And add ANY decaying satellite, where a good
> atmospheric model could be useful with "regular" obs. Regular obs are
> otherwise the least of problems.

That is also a great idea. For now, we have to concentrate on the tasks
within the google summer of code proposal. He has 3 months and you all know
how difficult it is when the requirements are starting to creep :).
For now, the startup task is to find different observation input formats of
objects in Earth' orbit and beyond especially of databases that are
regularly updated. So that is why we found your website.

The OrbitDeterminator is meant to find the orbital elements of cubesats and
other satellites that we try to track with our ground stations. We don't do
that optically, we use several stations to receive the rf-signals and try
to determine the EM-signal's origin by trilateration (pseudoranging). We
still don't know how "good" we are so we discussed to evaluate that with
another tracking source of the same satellite, and we would like to be able
to do that with your optical observations.

> How about inaccurate obs on a single pass,  or single obs on multiple days
> that just MIGHT be of the same object, and/or checking for possible matches
> to known very old elsets ?

Old sets are welcome to check the code of course. If you could provide
that, we would be more than happy to get them. We would then of course
provide our results back to the community to compare the qualiy between
ours and yours.

> I was considering contributing a few obs, but ISS is invisible to me now,
> NOAA 18 is too early in my twilight, and 17+19 too late for my social life.

That is a great offer! I would just ask you to wait for it a bit. We intend
to have a tracking session at the end of the mentioned 3months coding time.
We will use our stations by then to record fresh data for the purpose of
evaluation. And THEN we would like to invite you to join in a collective
and organized satellite observation of the ISS and NOAAs, so that we have
data sets by our pseudoranging and your optical observation.

This will mean we will have do coordintae this effort a bit to be able to
get data of the satellite in the same range of let's say the same hours.

This is why we asked if people here are regularly observing them so that we
could plan this :).
We would like to have this a team event with you and us observing together.
One night, at least two ways of observation and in the end, there are
results under open-source conditions we all can use as we like it :).  What
do you still say?

> /Björn

Best regards,

Seesat-l mailing list
Received on Sun Apr 29 2018 - 18:50:12 UTC

This archive was generated by hypermail 2.3.0 : Sun Apr 29 2018 - 23:50:13 UTC