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An in-depth simulation of EnMAP acquisition geometry

Schwind, Peter and Müller, Rupert and Palubinskas, Gintautas and Storch, Tobias (2012) An in-depth simulation of EnMAP acquisition geometry. ISPRS Journal of Photogrammetry and Remote Sensing, 70, pp. 99-106. Elsevier. DOI: [10.1016/j.isprsjprs.2012.03.012] ISSN 0924-2716

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Abstract

The future hyperspectral satellite EnMAP (Environmental Mapping and Analysis Program) uses two separate sensors for the acquisition of VNIR and SWIR imagery. Due to their geometric configuration, the SWIR and VNIR instruments map the same positions on the ground with a time delay of 88 ms. Coupled with attitude controller inaccuracies this leads to an estimated co-registration error between SWIR and VNIR higher than the maximum 0.2 pixels designated in the specifications of EnMAP imagery. It is assumed that, by approximating or interpolating the real attitude and geometrically correcting the images, this co-registration error can be significantly reduced. To validate these assumptions, a geometric simulator was developed at the German Aerospace Center DLR which is responsible for the development of the ground segment of EnMAP. The implemented simulator, together with an evaluation of the absolute and relative accuracy, performed using this simulator, are presented in this article. The obtained results demonstrate that the desired co-registration accuracy between SWIR and VNIR imagery can be achieved by using Spline or Chebyshev approximation for the attitude reconstruction but not by using Lagrange interpolation.

Item URL in elib:https://elib.dlr.de/75747/
Document Type:Article
Title:An in-depth simulation of EnMAP acquisition geometry
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schwind, PeterPeter.Schwind (at) dlr.deUNSPECIFIED
Müller, RupertRupert.Mueller (at) dlr.deUNSPECIFIED
Palubinskas, GintautasGintautas.Palubinskas (at) dlr.deUNSPECIFIED
Storch, TobiasTobias.Storch (at) dlr.deUNSPECIFIED
Date:18 May 2012
Journal or Publication Title:ISPRS Journal of Photogrammetry and Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:70
DOI :[10.1016/j.isprsjprs.2012.03.012]
Page Range:pp. 99-106
Publisher:Elsevier
ISSN:0924-2716
Status:Published
Keywords:EnMAP; Geometric simulation; Geometric correction; Attitude reconstruction; Approximation; Interpolation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Projekt EnMap / Bodensegment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Schwind, Peter
Deposited On:24 May 2012 07:17
Last Modified:06 Sep 2019 15:28

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