Re: notice on space track site about SGP4.

From: John A. Dormer 2 via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 11 Nov 2020 22:15:40 -0600
I have similar concerns. When I visited the 
http://www.astrodynamicstandards.org/ site, the banner says that "The 
Public Astrodynamic Algorithm Distribution Site is no longer available." 
While the documentation for the APIs appears to be included with the 
distribution package, it's now a bit more closed than it used to be.

The site stopped direct distribution sometime between February and April 
of 2018, so it's been like this for a while. I use 
https://web.archive.org/ to figure this out.

There are other Federal projects which publish tools via Github, but I 
suppose there's some constructive sensitivity to well-understood 
algorithms being published now. I disagree with the current tack which 
Space-Track seems to have taken.

     John

On 11/11/2020 21:18, Chris Kuethe via Seesat-l wrote:
> This is their binary build for x86 and x86_64 windows and Linux. No source
> code for the propagator, but it does have bindings and examples for various
> languages.
>
> I'm going to try to avoid using it in my workflows because I don't want to
> be "contaminated" by export controlled technical information, nor to become
> dependent on binaries that I can't fix. At least with source code I can try
> fix it when an OS upgrade breaks stuff (I'm lookin' at you Ubuntu 20.10 and
> passivedns...)
>
> It is awfully tempting to try side by side test between public libraries
> (vallado, python-sgp4, etc.) and space-track.
>
>
> On Wed, Nov 11, 2020, 15:15 Kevin Fetter via Seesat-l <seesat-l_at_satobs.org>
> wrote:
>
>> Version 8.0 of the SGP4 propagator is now available for download here:
>> https://www.space-track.org/documentation#/sgp4 Space Operations Command
>> highly recommends that you update your software to the latest version.
>> Please check the release notes in the Documentation folder of the package
>> for details.
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Received on Wed Nov 11 2020 - 22:16:27 UTC

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