2009 IEEE International Geoscience and Remote Sensing Symposium 2009
DOI: 10.1109/igarss.2009.5418204
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Ensuring globally the TanDEM-X height accuracy: Analysis of the reference data sets ICESat, SRTM and KGPS-tracks

Abstract: The TanDEM-X mission will derive a global digital elevation model (DEM) with satellite SAR interferometry. Height references play an important role to ensure the required height accuracy of 10m absolute and 2m relative for 90% of the data. In this paper the main height reference data sets ICESat (for DEM calibration), SRTM (for phase unwrapping) and kinematic GPS-Tracks (KGPS -for DEM verification) are analyzed regarding to their accuracy. For the ICESat data a reliable quality measure is developed. For SRTM a… Show more

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Cited by 49 publications
(52 citation statements)
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“…The results of this study are consistent with the results of other studies [7,[13][14][15][16][17] which were carried out using a traditional method on completely different reference data sets than the runways. Table 5 shows a comparison of the accuracy assessment of the WorldDEM TM performed using various reference data [17] and the results obtained in this study.…”
Section: Discussionsupporting
confidence: 91%
“…The results of this study are consistent with the results of other studies [7,[13][14][15][16][17] which were carried out using a traditional method on completely different reference data sets than the runways. Table 5 shows a comparison of the accuracy assessment of the WorldDEM TM performed using various reference data [17] and the results obtained in this study.…”
Section: Discussionsupporting
confidence: 91%
“…All the DEMs are resized to 30m pixel size by cubic interpolation. ICESat data are filtered using criteria in Table 2 because of the presence of the systematic errors (Huber et al, 2009). After filtering original ICESat data, we obtained 635 data points in our study area.…”
Section: Methodsmentioning
confidence: 99%
“…TanDEM-X (TDX) is the first space-born bistatic InSAR sensor that has solved the temporal decorrelation problem of repeat pass sensors. The main purpose of launching TDX was to produce a high precision global DEM with the standards of HRTI-3 (Huber et al, 2009;Krieger et al, 2007). In this study, the effect of various global digital elevation models in producing high-resolution DEMs using TanDEM-X Coregistered Single Look Slant Range Complex (CoSSC) images is investigated.…”
Section: Introductionmentioning
confidence: 99%
“…To compare the different spacing data the 0.15 arcsec (5m) grid data of DSM-tiles under the 65 m footprint of ICESat are averaged first. And then the averaged points, in which the standard deviations in the footprint were larger than 5m, are omitted from the comparison because the points in the steep/rough terrain may have less reliability (Huber et al, 2009). After the comparison the points, where the heights of ICESat were higher in more than 100 m, are associated with outliers due to the cloud reflections or saturated waveforms in ICESat data and are excluded from the results (Carabajal et al 2006).…”
Section: Icesatmentioning
confidence: 99%