Interesting Engineering on MSN3d
How Elon Musk’s SpaceX accidentally helped DARPA build a ‘rocket radar’
The team detected unusual disturbances linked to a SpaceX Falcon 9 rocket plummeting through the atmosphere during reentry.
Nature24d
The Propagation of Radio Waves over the Earth
THE modified form of the ionic deflexion theory of wave propagation, discussed by Messrs. Nichols and Schelling (NATURE, March 7, vol. 115, p. 334), appears to have been suggested in England and ...
The Debrief4d
DARPA is Using Earth’s Atmosphere as a Sensor to Detect Secret Explosions and Spacecraft Reentries
DARPA is using Earth’s atmosphere as a powerful sensor, allowing the detection of events like rocket reentries and illicit ...