remote sensing

Currently scientists have been measuring individual trees and trying to extrapolate, but this presents a "huge challenge" said Prof Mat Disney, professor of remote sensing, at University College London.

"Our knowledge of subglacial lacustrine environments has hinged largely on satellite measurements and radar mapping," Bell said, noting that the under-ice Lake Vostok – first suggested by Soviet sounding studies in the 1950s and 1960s – was at last confirmed in 1993 using laser altimetry from the European Remote Sensing-1 satellite.

Dr. John Barentine, an astronomer, dark sky consultant and historian of astronomy in Arizona, even pointed to the background image he uses for video calls as he spoke with Salon: it's a global composite image of Earth made by remote sensing platforms in space.

Another was in the commercial remote sensing regulatory affairs division, affecting the staff responsible for oversight of remote sensing from space that allows us to understand the scale of the problem of light pollution down on Earth.

The use of the radio spectrum is regulated internationally by the Radiocommunication Sector of the International Telecommunication Union, which publishes regulations allocating frequency ranges for different services or uses such as astronomy, remote sensing, communication and navigation, and also provides thresholds on power flux densities not to be exceeded by other services.