PER2:
Satellite mega-constellations create risks in Low Earth Orbit, the atmosphere and on Earth
Aaron C. Boley1 & Michael Byers2
Scientific Reports volume 11, Article number: 10642 (2021)
Satellite mega-constellations create risks in Low Earth Orbit, the atmosphere and on Earth | Scientific Reportshttps://www.nature.com/articles/s41598-021-89909-7"Thus, depending on the atmospheric residence time of material from re-entered satellites, each mega-constellation will produce fine particulates that could greatly exceed natural forms of high-altitude atmospheric aluminum deposition, particularly if the full numbers of envisaged satellites are launched. Anthropogenic deposition of aluminum in the atmosphere has long been proposed in the context of
geoengineering as a way to alter Earth’s albedo26. These proposals have been scientifically controversial and controlled experiments encountered substantial opposition27. Mega-constellations will begin this process as an
uncontrolled experiment28."
"we point out that satellite
re-entries from the Starlink mega-constellation alone could deposit more aluminum into Earth’s upper atmosphere than what is done through meteoroids; they could thus become the dominant source of high-altitude alumina. Using simple models, we also show that untracked debris will lead to potentially dangerous on-orbit collisions on a regular basis due to the large number of satellites within mega-constellation orbital shells. The total
cross-section of satellites in these constellations also greatly increases the risk of impacts due to meteoroids."
krome toho
[HOWKING @ O ----==== ASTRONOMIE ====---- O]