The Annual Behavior of Backscattering And Coherence of PALSAR Data. Wenjian Ni 1,2 , Zhifeng Guo 1 , Zhiyu Zhang 3 , Guoqing Sun 2 1 Institute of Remote Sensing Applications of Chinese Academy of Sciences 2 Department of Geography, University of Maryland, College Park
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Wenjian Ni1,2, Zhifeng Guo1, Zhiyu Zhang3 , Guoqing Sun2
1Institute of Remote Sensing Applications of Chinese Academy of Sciences
2Department of Geography, University of Maryland, College Park
3Beijing Normal University
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Introduction PALSAR Data
The multi-temporal backscattering data (HV).
Red: cycle 14, Green: Cycle 19, Blue Cycle 20;
Test site and data
2007/10/10 PALSAR Data
Backscattering over a year (HH)
There was no obvious change on spatial pattern
Backscattering over a year PALSAR Data
Frozen and snow
sprout of vegetation
thawing and snow melting
2007/07/09: No record
2007/07/10: No record
2007/08/25: 4:00 (0.25 mm)
21:00 (1.52 mm)
23:00 (0.25 mm)
No Precipitation on other dates of data acquisition.
Coherence over a year PALSAR Data
Rows:horizontal baseline, Columns: vertical baseline
There were totally 28 interferometric pairs formed by the 8 scenes of PALSAR data.
2007/07/10 vs. others
2007/07/10 vs. others PALSAR Data
Snow and frozen
IKNOS PALSAR Data
Successive interferometric pairs
Nearly noise PALSAR Data
Baseline 3992.907 m
(d) PALSAR Data
Spatial pattern of coherence and SRTM minus PALSAR-DEM.
(a) H75 from LVIS Ground Elevation (lge) acquired on 2009;
(b) SRTM minus DEM (2007/07/10~ 2007/08/25) (HV);
(c) Coherence of 2007/07/10~2007/08/25 (HH);
(d) Coherence of 2008/04/11~2008/05/27(HH);
which leads to the high soil moisture. The double bounce between canopy and ground at high
biomass area was the dominant and stable scattering component.
Why and How ?
Information lies in variations! How to use the data in other seasons?
Thank you for your attention PALSAR Data
Have a nice time in Vancouver!