Page 1 ENVISAT Validation Workshop - ESRIN – 9-13 December 2002 ENVISAT Validation Workshop, Frascati, 9-13 December 2002 Hannes Raggam Institute of Digital Image Processing, Joanneum Research, Graz Geometric Validation of PF-ASAR IMP and IMM Products
15
Embed
Page 1 ENVISAT Validation Workshop - ESRIN – 9-13 December 2002 ENVISAT Validation Workshop, Frascati, 9-13 December 2002 Hannes Raggam Institute of Digital.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1ENVISAT Validation Workshop - ESRIN – 9-13 December 2002
ENVISAT Validation Workshop, Frascati, 9-13 December 2002
Hannes RaggamInstitute of Digital Image Processing,
Joanneum Research, Graz
Geometric Validation of PF-ASAR
IMP and IMM Products
Page 2ENVISAT Validation Workshop - ESRIN – 9-13 December 2002
Test Procedures Applied to IMP and IMM
Import, format verificationVisual inspectionA-priori location accuracy through point residual
analysisEllipsoid geocoding:
Measure swath width IMM: Verify geometric continuity of multiple slices
Optional: Least squares parameter adjustment (a-posteriori
location accuracy) Geocoding, overlay of geocoded products
Page 3ENVISAT Validation Workshop - ESRIN – 9-13 December 2002
Flevopolder - Ground Control
— Pool of 49 control points measured in analogue maps 1:50.000 (Dutch stereographic projection, local Bessel ellipsoid)
— Transformation to UTM, WGS84 datum, Zone 31
Page 4ENVISAT Validation Workshop - ESRIN – 9-13 December 2002
A-priori Location Accuracy
— Prediction of azimuth/range pixel coordinates and comparison with measurements point residuals in image (pixel)
— Intersection of SAR range circle with co-centric Earth ellipsoid at height of target point P a-priori location error on ground (meters)
Page 5ENVISAT Validation Workshop - ESRIN – 9-13 December 2002