September 2024
Liberating access to space
... transport aircraft, a tried and tested system capable of launching payloads up to 1000 kg to a variety of low Earth orbit (LEO) inclinations, as an ‘air-launch’ platform. With more than 270 aircraft in service globally, the C-17 is flown by the...
26 August 2020
LEO constellations will "fundamentally change" astronomy, warns new report
Over 250 astronomers attending a virtual workshop on the impact of satellite mega constellations have warned that the 100, 000 or more low-Earth satellites expected to be deployed in mega constellations by companies and governments alike will will “...
09 September 2020
China's reusable spacecraft returns to Earth, deploys unknown object before deorbiting
... Chinese reusable experimental spaceship has successfully returned to Earth having spent two days in low-Earth orbit (LEO), Chinese news agency Xinhua reported on Sunday. The reusable spaceship was launched last week on a Long March...
February 2018
Are we asking the right questions about space debris?
...clusters, 85 percent of the interactions exceed hypervelocity speeds. The typical observation that the average encounter speeds in LEO are 10 km/s is somewhat misleading since for these clusters the median is around 12 km/s and the mode is well above...
April 2017
Mega-challenges for mega-constellations
...practice in implementing post mission disposal for spacecraft in LEO (less than 2000 km) and historical trends (...order is also observed in currently operated large constellations in higher LEO orbits, such as those of Iridium and Globalstar. As ...
January 2020
Satellite-based IoT - the race is on
.... Temporary bandwidth changes happen when GEO and LEO satellite operators share the same Ku-/Ka-band frequency band...earth station. Despite these solutions, managing and minimising LEO/GEO interference will become increasingly difficult with tens ...
