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The evaluation of two pyroelectric detectors for the EarthCARE Earth Observation mission.

Theocharous, E; Hartree, W S; Fox, N P; Hopkinson, G*; Gomaz-Rojas, L* (2008) The evaluation of two pyroelectric detectors for the EarthCARE Earth Observation mission. In: Proceedings of NEWRAD 2008 Conference.

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Abstract

The Broad Band Radiometer (BBR) instrument on ESA's Earth, Clouds, Aerosols and Radiation Explorer (EarthCARE) satellite requires detectors with a flat spectral response over two broad channels (0.2-4 µm and 4-50 µm) in order to measure values of instantaneous Earth radiance (in Wm-2Sr-1) with three along-track views with 10 km pixels (on ground). Infratec, Germany, were identified as a possible supplier of single element lithium tantalate (LiTaO3) pyroelectric detectors for the instrument and two detector types (one with polymer and one silver black coatings) were chosen for a study to assess their suitability for the mission. Of primary importance are good linearity, flatness of spectral response and stability of radiometric performance in the space environment. The characterisation of the spectral responsivity, linearity of response and spatial uniformity of the response of these detectors was completed by the Optical Technologies Team at the National Physical Laboratory (NPL) using the NPL detector characterisation facilities and will be the subject of this presentation.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: Optical Radiation and Photonics
Optical Radiation and Photonics > Radiometry and Detectors
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/5203

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