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 ...
February 2017
Protecting our space interests
...’ in outer space has not taken place there is no clear definition of what is a weapon in outer space. Objects orbiting in LEO travel at 7-8 km/second and two such objects would present a very high relative velocity, in the order of 10-16 km/s, which...
July 2021
Collaboration and competition in lunar exploration
... alongside other commercial partnerships, NASA is well within vision to eventually entrust the commercial industry with all LEO operations. This shift to purchasing services from the private sector is allowing NASA to focus on areas where commercial...
