On Feb 20, 2010, at 4:46 AM, Tim Moore wrote:
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.
Actually it is the wrapper magvar.XXX that is GPL'd coremag.XXX is
LGPLd
IIRC magvar.XXX use to live in FlightGear hence its license and was
brought into
SimGear later. Magvar is a simple wrapper program that could easily
be rewritten
and or its licensed changed. Curt if IIRC this is one of those that
I submitted
with your copyright on as I used to do to keep licensing issues simple
In any case no need to contact Ed as his code is LPGL already.
Cheers
Norman
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