Space and astronomy news
Earth observations are one of the most essential functions of our current fleet of satellites. Typically, each satellite specializes in one kind of remote sensing – monitoring ocean levels, for example, or watching clouds develop and move. That is primarily due to the constraints of their sensors – particularly the radar.
In a typical remote sensing application, a sensor is launched on a satellite that is very good at detecting a particular frequency of light. In radar terms, these are broken up into several different “bands,” each covering anywhere from a few megahertz to a few gigahertz. Some are more familiar than others, such as UHF , but some are more esoteric, such as the Ku band from 12-18 GHz.
That’s where Rydberg sensors come in. They are a novel type of sensor that uses the quantum state of a single atom to detect a broad band of different electromagnetic waves. For example, a single Rydberg sensor could detect signals from the HF band all the way up through the Ka-band at the faster end of the radar spectrum. This would allow a satellite with a single sensor to monitor all the different systems that radar can detect remotely.
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