Is any information about Cubesats in this flight?
That quote tree is based on discussion of radar stealth.Spray on optical stealth for space is pretty obvious (black paint), so I am pretty sure that isn't what Jim was referring to either.Last on the list of observation methods would be IR, and control of IR with paint is a consideration in spacecraft thermal design anyway. The RF paint is the obscure one that I wouldn't have guessed existed either if I hadn't heard about it before.
Quote from: OneSpeed on 09/25/2017 12:34 pm In short, yes you can change plane at any point in a low earth orbit, but changing plane is not the same as changing inclination, unless you do so at the equator.WrongWhat is meant by a dog leg. It is during ascent before the vehicle is orbital. The vehicle flies out at a certain azimuth and then steers to another one which changes the inclination. The only limitation (other than propellant) is that the vehicle can not go to a lower inclination than the latitude it is at during the maneuver.
In short, yes you can change plane at any point in a low earth orbit, but changing plane is not the same as changing inclination, unless you do so at the equator.
Also, inclination change does not have to be at the equator. That is just the most efficient place for the maneuver,. other locations are not as efficient and are subject to the above limitation.
Quote from: meberbs on 09/25/2017 10:27 pmThat quote tree is based on discussion of radar stealth.Spray on optical stealth for space is pretty obvious (black paint), so I am pretty sure that isn't what Jim was referring to either.Last on the list of observation methods would be IR, and control of IR with paint is a consideration in spacecraft thermal design anyway. The RF paint is the obscure one that I wouldn't have guessed existed either if I hadn't heard about it before.Raised eyebrow... You are going to paint thermal tiles? Also, "black" is not a perfect solution, most blacks will reflect some light. Many C-Type (carbonaceous) asteriods are very "black" and where still found optically. Just because something meets the definition of black does not mean you won't see it if you shine a light on it.
Quote from: kevin-rf on 09/26/2017 12:38 amQuote from: meberbs on 09/25/2017 10:27 pmThat quote tree is based on discussion of radar stealth.Spray on optical stealth for space is pretty obvious (black paint), so I am pretty sure that isn't what Jim was referring to either.Last on the list of observation methods would be IR, and control of IR with paint is a consideration in spacecraft thermal design anyway. The RF paint is the obscure one that I wouldn't have guessed existed either if I hadn't heard about it before.Raised eyebrow... You are going to paint thermal tiles? Also, "black" is not a perfect solution, most blacks will reflect some light. Many C-Type (carbonaceous) asteriods are very "black" and where still found optically. Just because something meets the definition of black does not mean you won't see it if you shine a light on it.Was not my original suggestion, I was just countering Jim's claim that there is no such thing as spray on stealth coating. Whether this is a good idea or necessary is a separate issue that I truly don't have an opinion on.I don't think anyone has ever claimed that any stealth system is perfect, but black is definitely more effective than white for optical stealth in space. That point doesn't change even if there are more effective methods that are just different like what you suggested.
Ted said the current 37B orbit is about 7 deg from the expected RAAN. So, how much energy the Falcon 9 wasted to reach this orbit?http://satobs.org/seesat/Sep-2017/0118.html
Clearly there is such a thing as spray on stealth paint. And for optical stealth, just use vantablack. That stuff doesn't reflect anything. Well, 99.96% absorbency. So 0.04% reflection. Also works as thermal camouflage.
Quote from: JamesH65 on 09/26/2017 09:30 amClearly there is such a thing as spray on stealth paint. And for optical stealth, just use vantablack. That stuff doesn't reflect anything. Well, 99.96% absorbency. So 0.04% reflection. Also works as thermal camouflage.Not spray on
Please forgive me if this is an ignorant question but, hearing all this speculation about stealth techniques got this old military man thinking. Doesn't this vehicle have solar panels? It would seem to me that making those stealth would be tough.For whatever is worth, from my experience as a submariner, the best stealth method is the most basic: hide.
It is recommend to use wide field optics, or on favourable passes, the unaided eye. Avoid observing close to the predicted intersection with Earth's shadow.
Do you need to be logged in or something? Reply 637 in that thread no longer has the picture. At least on a mobile device.