April 2019
The changing economics of space
...be increased pressure on space nations to implement remedial action This has been overcome by launching smaller spacecraft into LEO at around 2,000 km altitude, or medium Earth orbit (MEO) at about 20,000 km altitude, both of which remove much of the...
February 2021
Space archaeology - preserving our orbital heritage
... The threat posed by debris within the commercially and scientifically valuable LEO and MEO is significant. If an object is large enough and.... Hubble, on the other hand, in a 545 km LEO, is accessible for servicing, repair and upgrade. A number ...
May 2024
Could ICAO be a NewSpace regulator?
...that it is not compulsory for countries to register satellites on launching. The goal of the UK Space Agency’s Clearing of the LEO Environment with Active Removal (CLEAR) Mission is to remove at least two UK-registered derelict objects from low Earth...
September 2024
Hypersonics and the route to orbit
...an altitude of 100 km at speeds in excess of Mach 5 and, from this altitude, to deploy a transfer vehicle designed to carry payloads to LEO. “HELLO-2 takes this a step further”, said Dass, “with the capability to deliver payloads to the lunar surface...
May 2019
Wake-up call for debris creation in geostationary orbit
...available information that everyone is agreed on: in low Earth orbit (LEO) we have a problem. At the 7th European Conference on Space...40 year prevarication that characterised our response to the LEO threat. GEO debris modelling work by Anderson and ...
October 2021
Congested, contested... under-regulated and unplanned
... (GEO) satellites. A potential scenario, therefore, is that as the constellation satellites orbit the planet in low Earth orbit (LEO), they fly through the beam of a GEO satellite, transmitting on the same frequency, and cause interference to users...
