Geometric Validation of the PF-ASAR and InSAR Products

Präsentation zum Thema: "Geometric Validation of the PF-ASAR and InSAR Products"—  Präsentation transkript:

1 Geometric Validation of the PF-ASAR and InSAR Products
Detlev Kosmann *, Jürgen Holzner *, Hannes Raggam * * , Dave Small ***, Martin Huber* * DLR, D Wessling, Germany * * Joanneum Research, A-8010 Graz, Austria *** Remote Sensing Lab.RSL, University of Zürich, CH-8057 Zürich, Switzerland

2 Verification Approach
- Using Systemparameter (Orbit, SAR-Processor) - Ground Control Points - Corner Reflectors, Transponders - Product combination (SRTM)

3 Products for Verification
Major Product Types for Validation ASA_IMS ASA_IMG ASA_APS ASA_APG ASA_IMM ASA_WSM ASA_GM

4 Methodology of Geocoding Calibration Procedure
Product Input Format Control Visual Inspection Adjustment Geocoding GCP/ARC Measurement Error Analysis

5 Validation of IMG Products
Assumptions: SAR Processor Version ( December 2002) Predicted Orbit Doris Orbit FTP download from ESRIN PAC Products from UK and D Only Results from Processor V3.0.3 ASA_IMG_1PXPDE _210513_ _00487_03547_0001.N1 ASA_APG_1PXPDE _211632_ _00072_03633_0002.N1 ASA_IMG_1PXPDE _094453_ _00251_03311_0004.N1 ASA_IMS_1PXPDE _095619_ _00337_01894_0017.N1 (ASA_IMS_1PXPDE _094453_ _00251_03311_0004.N1) ! DORIS Orbits ! Past: Validation of more than 50 products

6 Ground Control Points 85 GCP Netherland 1 :50K National Datum

7 Reference Data-SRTM Terrain geocoded SRTM Amplitude X –Band data
Horz. Accuracy: 4m

8 Reference Data-DLR DLR Precise Geocoded Image: ETC

9 Combination of Reference and IMG’s
Red: SRTM Green: 3547 Blue: 3633

10 Detail

11 Shift: ETC-IMG leer

12 ! Pixel spacing in IMS geometry (A~4m, R~8m)
Product: IMS 337_01894_0017.N1 Initial Geometry: Ground control points : A[pxl] R[pxl] Rms Mean After Adjustment and Integration of GCPs: Ground control points : A[pxl] R[pxl] Rms Mean ! Pixel spacing in IMS geometry (A~4m, R~8m)

13 Product IMG 3311 Shift: 17 Pixel 212.5 m

14 Results for IMG products
Geometric accuracy with DORIS Orbits ~20m Temporal consistency is not stabile Product format check – ok Validation only in flat terrain Validation only in one quadrant of the globe

15 leer leer

16 Radiometry ASA_APM_1PXPDE20021106_211012 ( Saturation)
ASA_WSM_1PXPDE _221335_ql2 (Near-to-Farrange-Ramp)

17 Shift with/without Adjustment
Geometric Adjustment Shift to SRTM Shift with/without Adjustment

18 ERS reference products
Maps of testareas Geodetic parameter ERS reference products Terrain height (DEM) Position of ARC‘s

19 Required Location of Testareas
coordinate combinations corner reflector sites receiving stations ascending/descending turning point Greenwich Equator > 5 configurations

20 leer leer

21 WP: „Verfication of input products (all modes):
Acitivity Geometry InSAR Product format verification x - Visual product inspection x x Localisation accuracy x x Swath geometry x - Azimuth and ranging timing parameter x x Inter-channel coregistration x - Stripeline boundaries x - SWST x Geocoding parameter x - Orbit analysis x x Optimization x x ? Temporal consistency ? x x ? Radiometric resampling effects ? x -