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Old 05-27-2009, 11:57 PM   #1
William Maness
Orbinaut
Default Paid Contractor Wanted - Solar Power Satellite Module

Hello,

I have a need for an Orbiter version of a Solar Power Satellite module that I will specify for an orbiter developer. I have a budget allocated for this work, and am looking for a skilled orbiter add-on developer to take on the project as a paid contractor. If you are interested, please contact me at [email protected] with your relevant experience, and links to any of your prior projects. This is for experienced Orbiter developers only.

Best regards,
William Maness
President

PowerSat Corporation
3311 109th St SW #203, Everett, WA 98204
877.797.7281 | f: 425.609.1938 | [email protected]

Last edited by William Maness; 05-28-2009 at 12:03 AM. Reason: Forgot an important part of the title
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Old 05-28-2009, 12:06 AM   #2
Woo482
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what is this "Solar Power Satellite module" ?

Last edited by Woo482; 05-28-2009 at 12:19 AM.
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Old 05-28-2009, 12:18 AM   #3
TSPenguin
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Of course you can pay someone to make an addon for orbiter.
As long as the current Orbiter license is respected of course.
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Old 05-28-2009, 12:19 AM   #4
William Maness
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Sorry if I'm being unclear. I am working on a solar power satellite project. Orbiter is a pretty good 'first approximation' simulation for visualization and sketching out mission parameters. This is a real world project in its very early stages, so Orbiter is our 'simulator on the cheap.' However, we aren't programmers, and certainly aren't skilled at creating Orbiter addons. We want an orbiter developer to work with us to create a spacecraft in orbiter that acts like our satellite modules will. We're willing to pay said developer for his time and effort. I hope that's a bit clearer. Sorry if my initial request didn't make sense.

Best,

William
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Old 05-28-2009, 12:23 AM   #5
Woo482
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can you show us some images of it ?
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Old 05-28-2009, 12:29 AM   #6
TSPenguin
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Are you planning to release the addon to the public?
This is something many developers will want to know before considering your offer.
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Old 05-28-2009, 12:46 AM   #7
William Maness
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Default Pictures

Hello,

For some pictures... sure. These aren't exactly what we'll be looking for (they were done in 2002) but they're pretty close. A satellite core, inflatable structure, thin film solar cell array. We are NOT expecting to model the deployment from stowed to inflated in Orbiter.






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Old 05-28-2009, 12:53 AM   #8
T.Neo
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Those models look impressive.
In terms of the operation of the satillite, what do you intend to simulate?
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Old 05-28-2009, 12:53 AM   #9
Seb
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Looks good Can we have a general idea of what you want the developer to accomplish?
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Old 05-28-2009, 01:03 AM   #10
William Maness
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Quote:
Originally Posted by TSPenguin View Post
 Are you planning to release the addon to the public?
This is something many developers will want to know before considering your offer.
Not initially. However, once we've used it to do our analysis and generate a few videos, we will release the addon, but that will likely be a few months after its completion.

Best,

William

---------- Post added at 06:03 PM ---------- Previous post was at 05:54 PM ----------

Quote:
Originally Posted by T.Neo View Post
 Those models look impressive.
In terms of the operation of the satillite, what do you intend to simulate?
In our actual satellite, we are using solar-electric propulsion to shift our orbit from LEO out to GEO so the addon will need to know how to vector its thrust for a gradual spiral ascent (prograde burn) and know when it is in sunshine (because we don't get any thrust in the shadow) The farther out we get from earth, the more sunshine we get, etc. The models in the picture have an error, in that the actual production system has a de-spin coupling between the array and the satellite core so thrust can be generated off-normal to the plane of the array. This allows the solar cells to always point at the sun (something the model needs to do) The model needs an 'autopilot' to take it out to GEO (an input to the autopilot would be the desired longitude of the GEO orbit) Then, as it orbits, it should thrust while it's in the sunshine (prograde burns) quit when its not in the sunshine (no power for the thrusters), gradually spiraling out from LEO to GEO. Once at GEO altitude, it will need to do a circularization set of burns to finish the job. It's not trivial, but having such a 'toy' will let us play with different inclinations from different launch sites and see what that does to our time-to-GEO and fuel consumption. We have real-world ISP data, xenon tankage, etc to provide to the Orbiter addon designer.

Best,

William
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Old 05-28-2009, 01:42 AM   #11
tblaxland
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Quote:
Originally Posted by William Maness View Post
 In our actual satellite...[snip interesting info]
All sounds do-able.

Further to TSPenguin's comments about the license, this is FYI:
http://orbit.medphys.ucl.ac.uk/disclaimer.html
Quote:
ORBITER is free software in the sense that you are free to download, copy and redistribute it for personal and non-commerical purposes...
...You are not allowed to use Orbiter or parts of it in a commercial product without the author's consent.
My opinion is that you will be using Orbiter for commercial purposes but you will probably want a more informed legal opinion than mine
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Old 05-28-2009, 02:40 AM   #12
William Maness
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Quote:
Originally Posted by tblaxland View Post
 All sounds do-able.

Further to TSPenguin's comments about the license, this is FYI:
http://orbit.medphys.ucl.ac.uk/disclaimer.html
My opinion is that you will be using Orbiter for commercial purposes but you will probably want a more informed legal opinion than mine
Hmm. We're not selling Orbiter, or the add-on we want developed, and will release the add-on to the public domain once we're done with it. The "what-ifs" we want to play with in no way infringe on Dr. Schweiger's intellectual property. Nor are we incorporating Orbiter or any part of it in a product we intend to sell. Would you suggest that because one used Excel to do some modeling that the resulting model somehow infringes on MicroSoft's intellectual property? It sounds a bit extreme here. If Dr. Schweiger holds a differing view, we will of course abide by his wishes. In my estimation however, our intended use is properly aligned with the license agreement.

Best,

William
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Old 05-28-2009, 02:50 AM   #13
tblaxland
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Quote:
Originally Posted by William Maness View Post
 It sounds a bit extreme here.
Sorry, not wanting to be extreme - just wanting to make sure you have all the info
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Old 05-28-2009, 02:55 AM   #14
Omhra
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contact Martin because "using" does not equal "selling"... Language is; do not "use" for commercial purpose... if you get that using is... using it.
I could (but I don't) sell a ton of prints created from snapshots in orbiter... is that using orbiter for commercial purposes?... I would ask Martin.
Other than that... eh.. that technology is pretty good forward thinking.
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Old 05-28-2009, 03:17 AM   #15
William Maness
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I have sent the following message to Dr. Schweiger, just to err on the side of caution.

Quote:
Hello Dr. Schweiger,

I am working on a commercial solar power satellite venture. We are in the very early stages, and are using Orbiter to do a few what-if analysis and playing with orbit elements for our solar-electric propulsion satellites.

It has been brought to my attention that it is possible that we may be infringing on your use agreement, since we are a for-profit company. Let me be clear, we are not selling your software, or using any part of it in anything we will ever sell. We are using it as a tool to test out different launch and orbit scenarios, to determine which approaches merit more rigorous analysis. This seems to me to be within the intent of your licensing agreement, but other members in Orbiter Forum suggested that I contact you to make sure.

My email address is [email protected]. The thread in the Orbiter Forum is at http://www.orbiter-forum.com/showthread.php?t=8463 Please let me know if you have any objections to us using your software in such a fashion.

Best regards,

William Maness
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