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On 5/31/2017 8:15 PM, Bald Eagle wrote:
> Stephen <mca### [at] aolcom> wrote:
>
>> I knew there were a lot but seeing a visualisation puts it in
>> perspective. I wonder if there is an available data set of all the space
>> junk whizzing around the Earth?
>
> The first actual database I was able to dig up:
>
> http://www.ucsusa.org/nuclear-weapons/space-weapons/satellite-database#.WS8VoZLytaQ
>
> Apparently our sleazy politicians and spy agencies have too many secrets up
> there in Earth orbit, so the actual (portions of) databases are on a
> "demonstrable need to know" basis.
>
I wonder why? Oh! wait. The clue is in the link:
"nuclear-weapons/space-weapons" ;)
> I think the POV community needs to know.
>
Right! Now all we need is someone with a strong Russian accent to ask
your POTUS. ;)
--
Regards
Stephen
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On 5/31/2017 3:17 PM, Bald Eagle wrote:
> Stephen <mca### [at] aolcom> wrote:
>
>> Maybe one of the smart people could help.
>
> Be sure to take your frog pills today.
Woops! Thanks for reminding me. :)
> And wipe your chin.
>
>
I have a nice young nurse to do that for me. :)
>> I knew there were a lot but seeing a visualisation puts it in
>> perspective. I wonder if there is an available data set of all the space
>> junk whizzing around the Earth?
>
>
> I think that there is. Likely even Google has some of it.
Job done:
https://www.youtube.com/watch?v=3kBHaFcg0Z4
Actually looking at that video. My PC shut itself down and said it was
on strike. ;)
>
> I need to figure out how to reject badly-formed data, like the E's, the MPE's,
> the MPO's, etc in the data set, so I don't have to manually delete them.
> I also need to figure out how to plot the objects that look like they have
> parabolic paths. I haven't yet reasoned that out or investigated the equations
> and parameters for those yet.
> I can't imagine that there are things with hyperbolic orbits - but the universe
> is a surprising place.
>
> So, I have the planets, a lot of the moons, and asteroids.
>
> UV mapping of the planets and moons.
> (BTW, I really like the way your Earth looks with the normal mapping - I haven't
> gotten that far yet)
>
> A realistic starfield in the background would be nice - esp if there were some
> actual constellations in approx the right place. That would make a very nice
> sky_sphere indeed.
Have a look at this with a downloadable image map. Paul used to be a
regular contributor to these newsgroups.
http://paulbourke.net/miscellaneous/starfield/
> Not sure what else to throw in there - galaxies, nebulae - not sure what's large
> enough to be seen (if I fudge the scaling like I do with the planets and
> moons...)
>
> Comets would be very cool, and some of the man-made-satellite models as well.
>
No sooner said than done.
https://nasa3d.arc.nasa.gov/models
> Also on the list is a nice fly-through path for the camera to travel through the
> solar system and pause around each planetary system for a bit.
>
:)
>
> I suppose each data set for each set of objects could be worked out, and
> included in the central scene file.
Or include files that are loaded when in view.
> Things like the asteroids could be limited
> with a bailout number - which I already have implemented.
>
> ...... and if things get too unwieldly, we can always have Dick Balaska do all the
> animation frames on his render farm ;) :D
>
>
>
:)
--
Regards
Stephen
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Just found this:
Haven't yet watched the POV-Ray animations....
http://meikeltroniks.de/DLR-ALT/AG_PlanPhys/SESAME/Gall_e.html
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On 6/2/2017 6:02 PM, Bald Eagle wrote:
> Just found this:
> Haven't yet watched the POV-Ray animations....
>
> http://meikeltroniks.de/DLR-ALT/AG_PlanPhys/SESAME/Gall_e.html
>
Hmm! I'm getting a lot of this:
404
Das angeforderte Dokument ist nicht vorhanden.
The requested URL could not be found.
And the one that did download wouldn't display, even in VLC. :(
--
Regards
Stephen
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Looks like someone else took a crack at plotting lots of asteroid data in
POV-Ray a while back:
https://www.youtube.com/watch?v=crAGTOHWqNY&feature=youtu.be
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On 6/5/2017 2:44 PM, Bald Eagle wrote:
> Looks like someone else took a crack at plotting lots of asteroid data in
> POV-Ray a while back:
>
> https://www.youtube.com/watch?v=crAGTOHWqNY&feature=youtu.be
>
Not only that I recognise the three subscribers to the channel.
--
Regards
Stephen
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I thought you might be interested in :
https://www.physicsforums.com/threads/gear-ratios-to-gear-tooth-count.803389/
as well as the link to the gear train calculators:
http://www.scientific601.altervista.org/gear.html
(Which was what I was trying to describe a while back)
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On 6/5/2017 8:36 PM, Bald Eagle wrote:
> I thought you might be interested in :
>
I am, I am. But I might need to get Thomas to archive all these sites. ;-)
> https://www.physicsforums.com/threads/gear-ratios-to-gear-tooth-count.803389/
>
Any thread that talks about Meccano sets (or an Erector set for US
readers) is okay by me. :)
> as well as the link to the gear train calculators:
>
> http://www.scientific601.altervista.org/gear.html
>
> (Which was what I was trying to describe a while back)
>
--
Regards
Stephen
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On 5-6-2017 23:05, Stephen wrote:
> On 6/5/2017 8:36 PM, Bald Eagle wrote:
>> I thought you might be interested in :
>>
>
> I am, I am. But I might need to get Thomas to archive all these sites. ;-)
:-)
I am just sitting back and watching the show...
--
Thomas
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On 6/6/2017 7:51 AM, Thomas de Groot wrote:
> On 5-6-2017 23:05, Stephen wrote:
>> On 6/5/2017 8:36 PM, Bald Eagle wrote:
>>> I thought you might be interested in :
>>>
>>
>> I am, I am. But I might need to get Thomas to archive all these sites.
>> ;-)
>
> :-)
>
> I am just sitting back and watching the show...
>
It is worth watching IMO
--
Regards
Stephen
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