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A Method to Estimate Long-Wave Height Errors of SRTM C-Band DEM

Wendleder, Anna and Felbier, Andreas and Wessel, Birgit and Huber, Martin and Roth, Achim (2016) A Method to Estimate Long-Wave Height Errors of SRTM C-Band DEM. IEEE Geoscience and Remote Sensing Letters, 13 (5), pp. 696-700. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/LGRS.2016.2538822 ISSN 1545-598X

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Official URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7446267

Abstract

The digital elevation model (DEM) of the Shuttle Radar Topography Mission (SRTM) still has known long-wave height errors. These errors occur especially in the continent’s interior with a spatial scale of hundreds to thousands of Kilometers and a magnitude of several meters. In this letter, for the first time, a method for estimating those long-wave height errors with the in- tention to improve the absolute height accuracy of SRTM C-band DEM globally is presented. The improvement of the SRTM DEM bases on continuously defined spherical harmonics which are able to model the whole sphere. The highly accurate measurements of the Geoscience Laser Altimeter System instrument aboard the Ice, Cloud, and land Elevation Satellite (ICESat) serve as input for the least-squares adjustment which estimates the relevant coefficients of the spherical harmonics. Selection criteria are applied to these data to get ICESat points on flat and nonvegetated Areas which account for the most “reliable” points with an accuracy of approximately 1 m. Our results provide a height improvement of 5–6 m along Eurasia and up to ± 4 m along North America. The validation with worldwide Global Positioning System tracks proves that the absolute height accuracy of SRTM could generally be improved to better than 3 m.

Item URL in elib:https://elib.dlr.de/104374/
Document Type:Article
Title:A Method to Estimate Long-Wave Height Errors of SRTM C-Band DEM
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wendleder, AnnaAnna.Wendleder (at) dlr.deUNSPECIFIED
Felbier, AndreasAndreas.Felbier (at) dlr.deUNSPECIFIED
Wessel, BirgitBirgit.Wessel (at) dlr.dehttps://orcid.org/0000-0002-8673-2485
Huber, MartinMartin.Huber (at) dlr.deUNSPECIFIED
Roth, AchimAchim.Roth (at) dlr.deUNSPECIFIED
Date:May 2016
Journal or Publication Title:IEEE Geoscience and Remote Sensing Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:13
DOI :10.1109/LGRS.2016.2538822
Page Range:pp. 696-700
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:1545-598X
Status:Published
Keywords:digital elevation model (DEM), error compen- sation, Global Positioning System (GPS), Ice, Cloud, and land Elevation Satellite (ICESat), long-wave error, Shuttle Radar Topography Mission (SRTM), spherical harmonics.
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 TanDEM-X
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Wendleder, Anna
Deposited On:31 May 2016 08:19
Last Modified:08 Mar 2018 18:31

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