have radar transparent faceted dome/covers on the earth side, the faceting will reduce light reflectivity in any given direction
and yes there are plenty of radar transparent composites used in aviation and ship domes
Study: ultra-black coating could reduce satellite light pollution
51–56 of 56 posts
Re: Study: ultra-black coating could reduce satellite light pollution
#52Is it really good idea to make satellites "hidden" from sight? As a general idea it feels like an obstacle should be visible. Not hidden. Camouflaging a cell phone mast as a tree is one thing. Making a sattelite invisible sounds very much like not the same thing
Re: Study: ultra-black coating could reduce satellite light pollution
#53Is it really good idea to make satellites "hidden" from sight? As a general idea it feels like an obstacle should be visible. Not hidden. Camouflaging a cell phone mast as a tree is one thing. Making a sattelite invisible sounds very much like not the same thing
Surely satellite collision avoidance is not based on visual checks?
I would assume it's a combination of globally shared known trajectories plus radar tracking stations.
Re: Study: ultra-black coating could reduce satellite light pollution
#54Is it really good idea to make satellites "hidden" from sight? As a general idea it feels like an obstacle should be visible. Not hidden. Camouflaging a cell phone mast as a tree is one thing. Making a sattelite invisible sounds very much like not the same thing
Surely satellite collision avoidance is not based on visual checks? I would assume it's a combination of globally shared known trajectories plus radar tracking stations.
The floating ring of space debris around Earth would like to have a word with you.
Re: Study: ultra-black coating could reduce satellite light pollution
#55Earlier quoted context omitted.
I saw a few of these black Anish Kapoor sculptures. The experience was worth the cost. The brain has a hard time processing it.
Well, you've not actually seen the sculptures per se , only a missing area of the visual background, shaped like outline of the sculptures.
True! One can walk around and then observe some of the shape. They were behind glass. So no touching, which means there was some unresolved ambiguity.
Re: Study: ultra-black coating could reduce satellite light pollution
#56The entire underside of these satellites is a big phased array antenna. Maybe you can paint it so it absorbs all the other wavelengths, but it would be counterproductive to absorb the radio wavelengths used by the antenna itself since ground emitters would have to increase the gain to get through it.
communication link bandwidths are typically miniscule compared to optical spectrum of the sun
Sure, maybe you can find a paint that is black in all bands except for the ones used by the satellite. It won't use carbon black.