On Sat, Feb 20, 2010 at 1:28 AM, Michael A. K. Gross
<mgr...@sofia.usra.edu>wrote:
> Hi folks,
> I'm working on a US-government-funded flight planner for a NASA airborne
> astronomy mission (SOFIA). Airborne astronomy has worked in true headings
> for over 30 years due to ever-antiquated NASA INS systems, but the spec has
> recently changed to magnetic. So, I get to code up a magnetic variation
> model.
> SimGear has one, and it's simpler than anything else out there.
> Unfortunately, it claims GPLv2. That would force NASA's hand at releasing
>
Actually, that code is LGPLv2, which wouldn't force NASA to release the
code, unless you extract the coremag code and insert it into the planner
application. Simgear is supposed to be LGPL, though the GPL has crept into a
couple of files; mostly by mistake, I believe.
> the planner code publicly, not something I can do as a contractor (nor
> would it be useful to anyone -- AFAIK, SOFIA is the only airworthy aircraft
> in existence that does not fly the wind triangle). So, I seek permission
> to
> use the pair of files coremag.hxx and coremag.cxx without releasing the
> "entire
> work."
> I would like to modify it to read coefficients from a file, so we can
> update it to stay consistent with our FMS, to localize the namespace, and
> to excise it from SimGear (no SG #includes). I will ask if I can
> contribute
> this to the SimGear project, but it's not very likely.
>
What a deal for us! :)
You should probably ask the copyright holder Edward A Williams <
ed_willi...@compuserve.com> directly.
Tim
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