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THE FUTURE SPACEBORNE HYPERSPECTRAL IMAGER ENMAP: ITS IN-FLIGHT RADIOMETRIC AND GEOMETRIC CALIBRATION CONCEPT
Geometric Calibration Radiometric Calibration Hyper spectral Satellite
2014/4/25
The German Aerospace Center DLR – namely the Earth Observation Center EOC and the German Space Operations Center GSOC – is responsible for the establishment of the ground segment of the future German ...
A reliable cw Lyman-$α$ laser source for future cooling of antihydrogen
Lyman-alpha Four-wave mixing Antihydrogen
2011/8/29
We demonstrate a reliable continuous-wave (cw) laser source at the 1 S–2 P transition in (anti)hydrogen at 121.56 nm (Lyman-α) based on four-wave sum-frequency mixing in mercury. A two-photon resonanc...