Computer Science – Performance
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apopt..15..891j&link_type=abstract
(International Conference on Infrared Physics, Zurich, Switzerland, Aug. 14, 1975.) Applied Optics, vol. 15, Apr. 1976, p. 891-9
Computer Science
Performance
2
Degrees Of Freedom, Infrared Detectors, Performance Prediction, Remote Sensors, Astronomical Spectroscopy, Cost Effectiveness, Optimization, Radiometers, Signal To Noise Ratios, Surveillance
Scientific paper
The performance of passive sensors for surveillance, radiometry, spectroscopy, and astronomy is analyzed using idealizations of engineering features. Sensors are characterized by a finite number of degrees of freedom in each of two angles, wavelength, and time. An optimum number of degrees of freedom is found to sense a target field in four dimensions. Degrees of freedom are quite freely interchangeable between dimensions of different kinds. An optimum number of output states is related to the sensing or measurement requirement. An optimum weighting is found for averaging the degrees of freedom into output states. Simple equations relate performance to an index of cost. Examples apply the results to estimate limits on sensor performance for several applications.
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