Centre de documentation
scientifique

Terra MODIS on-orbit spatial characterization and performance / X. Xiong in IEEE Transactions on geoscience and remote sensing, vol 43 n° 2 (February 2005)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 43 n° 2 (February 2005) . - pp 355 - 365 Titre : Terra MODIS on-orbit spatial characterization and performance Type de document : Article/Communication Auteurs : X. Xiong, Auteur ; N. Che, Auteur Année de publication : 2005 Article en page(s) : pp 355 - 365 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] capteur multibande [Termes IGN] étalonnage radiométrique [Termes IGN] instrument embarqué [Termes IGN] méthode robuste [Termes IGN] Moderate Resolution Imaging Spectroradiometer [Termes IGN] orbite [Termes IGN] performance [Termes IGN] superposition d'images Résumé : (Auteur) The Moderate Resolution Imaging Spectroradiometer (MODIS) Proto-Flight Model, onboard the National Aeronautics and Space Administration's Earth Observing System Terra spacecraft, has been in operation for over four years. It has 36 spectral bands and a total of 490 detectors located on four focal plane assemblies (FPAs). MODIS makes observations at three spatial resolutions (nadir): 0.25 km, (bands 1-2), 0.5 km (bands 3-7), and 1 km (bands 8-36). The instrument's spatial characterization was measured prelaunch using an integration and alignment collimator. Parameters measured included the detectors' instantaneous field-of-view (IFOV), band-to-band registration (BBR), and line spread function in both the along-scan and along-track directions. On orbit, the spatial characterization is periodically measured using the onboard spectro-radiometric calibration assembly (SRCA). This paper describes the SRCA BBR algorithms, characterization methodologies, and on-orbit results. A Fourier approach used to calculate the along-track BBR is also described. This approach enhances the algorithm's robustness in comparison with the conventional centroid approach. On-orbit results show that the Terra MODIS focal planes shifted slightly during launch and initial on-orbit operation. Since then they have been very stable. The BBR is within 0.16 km (nadir IFOV) in the along-scan direction and 0.23 km (nadir IFOV) in the along-track direction among all bands. The small but noticeable periodic variation of the on-orbit BBR can be attributed to the annual cycling of instrument temperature due to sun-earth distance variation. The visible FPA position has the largest temperature dependence among all FPAs, 17 m/K along-scan and 0.6 m/K along-track. Numéro de notice : A2005-103 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2004.840643 En ligne : https://doi.org/10.1109/TGRS.2004.840643 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27241 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-05022	RAB	Revue	Centre de documentation	En réserve L003	Disponible
065-05021	RAB	Revue	Centre de documentation	En réserve L003	Disponible