April 2017
Urgent action needed to keep satellites safe in orbit
... by students or the public [24]. Definition of the GEO protected region as per IADC guideline 3.3.2 [2]. This defines a toroid-like band that encircles Earth. Active Debris Removal (ADR) will need to be accomplished at some point because even under...
June 2017
How to build a Moon base cheaply
... outside vacuum. At the same time, the aerodynamic window allows for raw materials in the form of threads, bands or thin gas tubes to enter the chamber. Streams of materials that enter the chamber at the speed of 1700...
August 2017
Space invaders and the usual suspects - disruptive trends in Earth observation
... first commercial operator. Its uniqueness is its capacity to offer both VHR optical (Pleiades-1A and Pleiades 1B) and X-band radar imagery (TerraSAR-X and TanDEM-X). There is no major anchor tenancy contract but the twin Pleiades satellites...
September 2017
Telescope targets enigmatic deep space mystery
... class of radio source. Dispersion sweep of the ‘Lorimer Burst’. The total delay across the entire frequency band is about half a second. The higher frequencies arrive earlier in time compared to the lower frequencies resulting in the...
October 2017
The sci-fi noir world of Blade Runner
... intelligence (e.g. counting the number of cars of a parking lot). There is a real hunger for data, in all sorts of spectral bands, work scale, revisit cycle, etc. Spatial resolution down to half a metre is now mainstream, the limit being...
October 2017
Exploring Jupiter’s icy moons
... is powered by batteries and 97 m2 of solar arrays, providing 840 W at Jupiter at the end of mission. The spacecraft communicates in X and Ka bands through its high-gain and medium gain antennas, also used for radio-science investigations. The...
