Satellite geophysics. Topography, lec_day_10_1.ppt C.C.Tscherning, University of Copenhagen, 2013-12-15 1 Altitude of land areas Depth of lakes Altitude.

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Presentation transcript:

Satellite geophysics. Topography, lec_day_10_1.ppt C.C.Tscherning, University of Copenhagen, Altitude of land areas Depth of lakes Altitude and depth of ice and sea areas. Changes of these altitudes/depths.

Satellite geophysics. Topography. C.C.Tscherning, University of Copenhagen,

Satellite geophysics. Topografi. C.C.Tscherning, University of Copenhagen, Satellittes: Instruments ble.aspxhttp://database.eohandbook.com/database/instrumentta ble.aspx Data sources w.aspxhttp://database.eohandbook.com/measurements/overvie w.aspx

Satellite geophysics. Satelitter I, USA. C.C.Tscherning, University of Copenhagen, SRTM, - Space Shuttle TPX – Radar altimetry and SAR ICESAT – Laser altimetry ASTER Landsat 5 og 7 NMP EO-1

Satellite geophysics. Satelittes II, EU/CDN C.C.Tscherning, University of Copenhagen, ENVISAT, (ESA) RADARSAT, (CDN) CryoSat2 (ESA) SPOT-4,5, (CNES) RapidEye (DLR) TanDEM-X (DLR) TerraSAR-X (DLR)

Satellite geophysics. Satelittes III, Rus mm. C.C.Tscherning, University of Copenhagen, Monitor-E Rus) Resurs DK 1 (Rus) THEOS (Tailand)

Satellite geophysics. Instruments, I. C.C.Tscherning, University of Copenhagen, Radar and Laser altimeters Interferometrisk altimetri MSS – Multispectral scanner (80 m res.) TM, ETM+. Thematic mapper (30 m res.) ALI, optical imager (10 m res.) Hyperion, Hyperspectral imager (30 m res.) LEISA AC – correction for atmosphere

Satellite geophysics. Instruments, II. C.C.Tscherning, University of Copenhagen, HRVIR (Visible, infrared), (10 m res., styrbar !) X-band SAR (1.2 – 1.4 m res.) PAN (GISTDA), High Res. Optical (2m res.) PSA (Pancromatic Imag. System), (8 m res.) GEOTON – optical (1 m res.) ARINA – electromagnetic field variations

Satellite geophysics. Generelt. C.C.Tscherning, University of Copenhagen, Some instruments only look ”down” Some instruments may be turned around one axis There is large differences in resolution and coverage. Most are sun-syncroneous Repeat cycle varies a lot: From 1 day (with 5 satellitter)

Satellite geophysics. Dephts. C.C.Tscherning, University of Copenhagen, From sea-surface height minus sea-surface topography (approximately the geoid) gravity may be computed due to the validity of the Laplace equation. Then inverse problem is solved, and dephts are obtained using density of sea-water and a bottom with constant density..

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Satellite geophysics. Ice thicknesses. C.C.Tscherning, University of Copenhagen,

Satellite geophysics. SRTM.SRTM C.C.Tscherning, University of Copenhagen, The Shuttle Radar Topography Mission (SRTM) obtained elevation data on a near- global scale to generate the most complete high-resolution digital topographic database of Earth. SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission in February of 2000.

Satellite geophysics. SRTM.SRTM C.C.Tscherning, University of Copenhagen,

Satellite geophysics. SRTM.SRTM C.C.Tscherning, University of Copenhagen,

Satellite geophysics..SRTM - UCPH.SRTM - UCPH C.C.Tscherning, University of Copenhagen,

Satellite geophysics. ASTERASTER C.C.Tscherning, University of Copenhagen, Flying on ”TERRA” Covers up to 81 gr.

Satellite geophysics. ASTER. C.C.Tscherning, University of Copenhagen, Maule Volcanic Field, Chile-Argentina