Schlund, Michael und von Poncet, Felicitas und Wessel, Birgit und Schweißhelm, Barbara und Kiefl, Nadine (2023) Assessment of TanDEM-X DEM 2020 Data in Temperate and Boreal Forests and Their Application to Canopy Height Change. PFG - Journal of Photogrammetry, Remote Sensing and Geoinformation Science, 91, Seiten 107-123. Springer. doi: 10.1007/s41064-023-00235-1. ISSN 2512-2789.
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Offizielle URL: https://link.springer.com/article/10.1007/s41064-023-00235-1#article-info
Kurzfassung
Space-borne digital elevation models (DEM) are considered as important proxy for canopy surface height and its changes in forests. Interferometric TanDEM-X DEMs were assessed regarding their accuracy in forests of Germany and Estonia. The interferometric synthetic aperture radar (InSAR) data for the new global TanDEM-X DEM 2020 coverage were acquired between 2017 and 2020. Each data acquisition was processed using the delta-phase approach for phase unwrapping and comprise an absolute height calibration. The results of the individual InSAR heights confirmed a substantial bias in forests. This was indicated by a mean error (ME) between -5.74 and -6.14 m associated with a root-mean-squared-error (RMSE) between 6.99 m and 7.40 m using airborne light detection and ranging (LiDAR) data as a reference. The bias was attributed to signal penetration, which was attempted to be compensated. The ME and RMSE improved substantially after the compensation to the range of -0.54 to 0.84 m and 3.55 m to 4.52 m. Higher errors of the penetration depth compensated DEMs compared to the original DEMs were found in non-forested areas. This suggests to use the penetration compensation only in forests. The potential of the DEMs for estimating height changes was further assessed in a case study in Estonia. The canopy height change analysis in Estonia indicated an overall accuracy in terms of RMSE of 4.17 m and ME of -0.93 m on pixel level comparing TanDEM-X and LiDAR height changes. The accuracy improved substantially at forest stand level to an RMSE of 2.84 m and an ME of -1.48 m. Selective penetration compensation further improved the height change estimates to an RMSE of 2.14 m and an ME of -0.83 m. Height loss induced by clearcutting was estimated with an ME of -0.85 m and an RMSE of 3.3 m. Substantial regrowth resulted in an ME of -0.46 m and an RMSE of 1.9 m. These results are relevant for exploiting multiple global acquisitions of TanDEM-X, in particular for estimating canopy height and its changes in European forests.
elib-URL des Eintrags: | https://elib.dlr.de/195050/ | ||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||
Titel: | Assessment of TanDEM-X DEM 2020 Data in Temperate and Boreal Forests and Their Application to Canopy Height Change | ||||||||||||||||||||||||
Autoren: |
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Datum: | 1 März 2023 | ||||||||||||||||||||||||
Erschienen in: | PFG - Journal of Photogrammetry, Remote Sensing and Geoinformation Science | ||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||
Band: | 91 | ||||||||||||||||||||||||
DOI: | 10.1007/s41064-023-00235-1 | ||||||||||||||||||||||||
Seitenbereich: | Seiten 107-123 | ||||||||||||||||||||||||
Verlag: | Springer | ||||||||||||||||||||||||
ISSN: | 2512-2789 | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | InSAR, TanDEM-X, Canopy height changes, LiDAR, Forest | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Fernerkundung u. Geoforschung, R - Unterstützung TerraSAR-X/TanDEM-X Betrieb | ||||||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||||||
Institute & Einrichtungen: | Deutsches Fernerkundungsdatenzentrum > Dynamik der Landoberfläche Institut für Methodik der Fernerkundung > SAR-Signalverarbeitung | ||||||||||||||||||||||||
Hinterlegt von: | Wessel, Dr.-Ing. Birgit | ||||||||||||||||||||||||
Hinterlegt am: | 19 Jun 2023 10:07 | ||||||||||||||||||||||||
Letzte Änderung: | 19 Jun 2023 10:07 |
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