XXII ISPRS Congress 2012: Technical Commission VII

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Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663821976

Title:: Technical Commission VII

Scope:: 546 Seiten

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663821976

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B7)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VII/2: SAR INTERFEROMETRY]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: AIRBORNE X-HH INCIDENCE ANGLE IMPACT ON CANOPY HEIGHT RETREIVAL: IMPLICATIONS FOR SPACEBORNE X-HH TANDEM-X GLOBAL CANOPY HEIGHT MODEL M. Lorraine Tighe, Doug King, Heiko Balzter, Abderrazak Bannari, Heather McNairn

Document type:: Multivolume work

Structure type:: Chapter

pass derived hy, along transect lines were considered as reference data; i.e. this is not an accuracy assessment. The R? values were also tabulated. The results for all site data combined were tabulated as a weighted average based on the number of samples per site, since they were not equal at each site. International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B7, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia Wetland 8 NR 3.11 | -146 | 4.11 -2.96 (7.2 m) 7 MR 3.01 | -1.35 3.99 -2.19 Table 2. NEXTMap and single-data take X-HH InSAR-derived hg, error assessment against in situ vegetation canopy height for the International Falls site, stratified by vegetation cover type and incidence angle range for «10 terrain slope. S s km - Far-Range (FR) Akm - Mid-Range (MR) | km - Near-Range (NR) Figure 5. Transect line (dashed line) positions in near-, mid-, and far-range for one strip of X-HH InSAR data. 6. RESULTS AND DISCUSSION 6.1 Vertical Accuracy of IDSAR Vegetation Canopy Height The results of the incidence angle analysis comparing the X-HH InSAR single- and multi-pass he data against in situ measurements of vegetation canopy height in flat terrain (<10") stratified by vegetation class and incidence angle are presented in Tables 1-3 for all site data stratified by research site, vegetation type, and incidence angle class (NR, MR, FR). X-HH InSAR | X-HH InSAR Vegetation # NEXTMap single-pass (mean tree in 0 mean mean height) situ rmse | error | rmse | error (m) (m) (m) (m) Shrub 154 | NR 1.77 | -075 2.18 -2.48 (43 m) 184 | MR 1.71 | -0.73 2.11 -2.40 139 | FR 1.744 074 | 215 -2.44 Decidhons 19 | NR 6.25 | -2.45 6.84 -3.18 (15.2 m) 21 | MR 6.08 | -2.37 6.63 -3.08 18 | FR 6.15 | -2.41 6.74 -3.13 Cénitétons 29 | NR 6.23 | -281 8.34 -2.06 (15.5 m) 31 | MR 6.04 | -2.72 8.08 -2.00 27 | FR 6.13} -2.77 8.21 -2.03 X-HH InSAR X-HH InSAR Vegetation # NEXTMap Single-pass (mean tree in 0 mean mean height) situ nnse | error | rmse error (m) (m) (m) (m) Shrub 9 NR 1.92 | -0.69 2.89 -2.31 (4.1 m) 6 MR 1.89 | -0.54 2.99 -2.52 5 FR 1.91 | -0.63 2.74 -2.99 S 24 | NR 6.24 | -2.43 7.32 -3.48 Da 31 [MR ( 6111 251 7001 324 49 | FR 6.31 | -2.11 7.17 -3.29 " : 22 I NR 6.29 | -2.83 8.48 -2.73 C ES 31 IMRI 627] 299] 799] 23 29 | FR 6.12] -2.18 8.41 -2.99 Mixed 6 NR 6.42 | -221 7.21 -3.05 (14.7 m) 9 MR 6.32 | -2.43 7.33 -3.25 S FR 6.33 | -2.19 7.45 -3.19 Table 1. NEXTMap and single-data take X-HH InSAR-derived hy, error assessment against in situ vegetation canopy height for the Ely site, stratified by vegetation cover type and incidence angle range for «10 terrain slope. X-HH InSAR X-HH InSAR Vegetation # NEXTMap single-pass (mean tree in 0 mean mean height) situ rmse | error | rmse error (m) (m) (m) (m) Shrub 10 | NR 1.86 | -0.83 2.29 -2.01 (4.0 m) 8 MR 1.68 | -0.71 2.33 -2.21 Deciduous 27 4 NR 6.44 | -2.15 8.12 -3.12 (15.1 m) 29 | MR 6,1 | -2.34 8.01 -2.97 Coniferous 15 | NR 6.35 | -2.93 9.02 -2.22 (15:5 m) 15 | MR 6.24 | -2.77 8.89 -2.11 Mixed 14 | NR 6.52 | -2.26 7.06 -3.38 (14.6 m) 16 | MR 6.12] -2.13 7.26 -2.87 Table 3. NEXTMap and single-data take X-HH InSAR-derived hy, error assessment against in situ vegetation canopy height for the Arizona site, stratified by vegetation cover type and incidence angle range for «10 terrain slope. The results for the multi-pass INSAR (NEXTMap), in most cases, supported the theory that in NR (steep incidence angles, e.g. © = 35") greater exposure of the lower vegetation canopy structure leads to greater canopy penetration, greater volume scattering if there is understory, or if little to no understory, greater double bounce, and a decrease in the amount of volume scattering contributions higher up in the canopy. This scenario results in a lower overall scattering phase centre height (hy) or greater vegetation canopy height underestimation in the single- data take InSAR data. The opposite effect occurs in the FR, where at shallow incidence angles (0 = 55) there is an increase in more relative volume scattering from the upper canopy, little to no ground scattering contributions, resulting in more accurate vegetation canopy height estimates. The improvements from NR to FR were, however, minor, indicating that the multi-pass InSAR are not impacted by changes in incidence angle in flat terrain due to the aggregation of multiple flight line passes. In the case of the single-data take results, the theory did not hold through. In fact, in some cases the NR were better than the FR, and in most cases the MR were worse than both the NR and FR. Overall, however, the differences were not significant, indicating that that incidence angle range for flat terrain does not play a major role in the vegetation canopy height accuracy. Comparisons of the transect lines (Figure 5) are presented in the next section and help to explain a possible reason for the deviation from the expected theory. 6.2 Single and Multi-Pass X-HH InSAR Scattering Phase Centre Height Comparison — Stratified by Incidence Angle The results of the incidence angle analysis comparing transect lines that run parallel to the X-HH InSAR single-data take flight line strips (Figure 5) against the NEXTMap multi-pass X-HH InSAR in flat terrain («10») are presented in Table 4 for all site data combined and stratified by range class into NR, MR, and FR, respectively. The mean differences shown in Table 4 are all negative, meaning that on average, single-data take derived hy, was slightly lower than NEXTMap h,pe The RMSD decreased and R° increased from NR to FR, indicating a greater correlation

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