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Validation of LST and other SAF products

Validation of LST and other SAF products. Folke-S. Olesen, Frank-M . Göttsche, Annika Bork-Unkelbach Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany. Kalahari bush: Namibia, Farms. KIT’s 4 permanent LST validation stations. Heitronics KT15.85 IIP radiometer

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Validation of LST and other SAF products

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  1. Validation of LST and other SAF products Folke-S. Olesen, Frank-M. Göttsche, Annika Bork-Unkelbach Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany

  2. Kalahari bush: Namibia, Farms KIT’s 4 permanent LST validation stations • Heitronics KT15.85 IIP radiometer • Successful radiometer comparison at CEOS • Proven homogeneity of sites > 100 km² • Current validation of MSG-SEVIR LST • Well distributed on MSG-disk • IR-radiometerHeitronics KT15.85 IIP • chopped, precision radiometer: stability better than 0.12% per year • narrow band 9.6μm -11.5μm (completely in atmospheric window) • better than ±0.3K absolute accuracy • 0.06K temperature resolution • Full view angle: 8.5° • One KT15 for each end-memberOne KT15 for sky radiance (reflected rad.) • Campbell CR1000 logger sample at 1 min Desert: Namibia, Gobabeb Temperate vegetation: Portugal, Evora Semi-arid (tiger bush): Senegal, Dahra

  3. South of Tropic of Capricorn(23.55S, 15.05E) Sun always north On fringe of gravel plain > 900 km2 Gobabeb LST Validation Station

  4. Gobabeb field survey 2010 Namib Desert Locations of mobile mast Main Tower : 10.3. – 11.3 Tidbit01 (prairie): 11.3. – 14.3. Fuerteventura : 14.3. – 16.3. results support “car-validation” BT of Landsat ETM+, 06.04.2000 Car (diamonds)versus validationstation(Gobabeb, blueline) bias 0.4°C, std.-dev 1.2°C “Car-validation” Red crosses x mark track started at Tidbit01 reversed at NE end finished near Gobabeb

  5. Validation Results Evora RMZ farm

  6. Extension of Validation in CDOP-2 Frank-M. Göttsche, Folke-S. Olesen, and Annika Bork-Unkelbach Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany

  7. SW & LW Radiation Balance • LW & SW radiancebalance • at all stationssincesetup • BSRN-standard in Gobabeb(Namibdesert) since May 2012(in co-operationwith University of Basel) • Upwelling SW & LW • Direct, diffuse & total downwelling(trackersystem) • NDVI in-situ measurements • Dahra in rain seasonsince 2008 (Univ. ofCopenhagen) • Kalahari wholeyearfrom Sept. 2012 • Enhanced 2m-temperature (LSAT) for all stations • Emissivitymeasurements – all exceptEvora

  8. Test of Unmanned Aerial Vehicle (UAV)

  9. VIS imagery from KIT UAV Nominal altitude of UAV: 200m Gobabeb Research & Training Centre Kuiseb River FlyCamOne3

  10. Summary • LST validationcontinued • SW & LW radiancebalancecontinued – BSRN in Gobabeb • NDVI continued in Dahra – started in Kalahari • 2m temperatureat all stations – 3m profilesplannedfor 2013 • Emissivitymeasurements – all exceptEvora • Successfullsitecharacterisationongoing • UAV sitecharacterisation still experimental • Anisotropyof IR radianceunderinvestigationLST independantfromview angle isultimategoal • Determination of TSP „thermal surfaceparameter“

  11. „Site“-seeing tour

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