New nano-satellite system yields high-res imagery at lower cost
"This is an invention that completely changes the costs of space exploration, astronomy, aerial photography, and more," Angika Bulbul, a BGU Ph.D. candidate, said in a news release.
As revealed by the new study, published in the journal Optica, groups of small satellites the size of milk cartons, when arranged in a ring shape, can focus light onto another imaging satellite, producing images rivaling those captured by large telescopes and their full-frame, lens-based or concave mirror systems.
"Several previous assumptions about long-range photography were incorrect," Bulbul said. "We found that you only need a small part of a telescope lens to obtain quality images."
Researchers were able to capture high-resolution images using only a tiny fraction of a full lens on each nano-satellite model.
"Consequently, we can slash the huge cost, time and material needed for gigantic traditional optical space telescopes with large curved mirrors," Bulbul said.
Researchers didn't launch any nano-satellites into space for their study. Instead, they build a miniature satellite constellation in their lab. The proof-of-concept tests showed the circular array of sub-apertures yielded image resolution on par with full lens imagery.
The technology could democratize space imagery, as nano-satellites are much cheaper to build and launch.
