Details
| Original language | English |
|---|---|
| Title of host publication | 2014 IEEE International Geoscience & Remote Sensing Symposium |
| Subtitle of host publication | Proceedings |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 3798-3801 |
| Number of pages | 4 |
| ISBN (electronic) | 9781479957750 |
| Publication status | Published - 6 Nov 2014 |
| Event | Joint 2014 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2014 and the 35th Canadian Symposium on Remote Sensing, CSRS 2014 - Quebec City, Canada Duration: 13 Jul 2014 → 18 Jul 2014 |
Abstract
In the last years extreme flood events occur more frequently in Vietnam. Conventional satellite altimeters offer high altimetric accuracy but with insufficient spatial and temporal resolution. Ground based instrumentation enables a high altimetric accuracy with high temporal resolution, but for a point location only. GNSS-Reflectometry (GNSS-R) reveals new perspectives for water level monitoring. To test the possibility of using this innovative technique as a gauge instrument, a two weeks lasting measurement campaign was conducted in Vietnam, in February 2012. The data analysis showed the presence of multipath effects other than the water level in the direct and the reflected signals that deteriorate the results. Using the Empirical Mode Decomposition method (EMD), the water reflections are isolated from further multipath. With a model of these reflections, a correlation of 0.84 instead of 0.67 between the GNSS-R calculated water level changes and the recorded water level changes from a gauge instrument could be reached. Furthermore, applying EMD improves the standard deviation of the determined water heights from 12cm to 5cm.
Keywords
- Altimetry, Empirical Mode Decomposition, GNSS-Reflectometry, Multipath
ASJC Scopus subject areas
- Computer Science(all)
- Computer Science Applications
- Earth and Planetary Sciences(all)
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2014 IEEE International Geoscience & Remote Sensing Symposium: Proceedings. Institute of Electrical and Electronics Engineers Inc., 2014. p. 3798-3801 6947311.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Water level monitoring of the Mekong Delta using GNSS reflectometry technique
AU - Beckheinrich, J.
AU - Hirrle, A.
AU - Schön, S.
AU - Beyerle, G.
AU - Semmling, M.
AU - Wickert, J.
PY - 2014/11/6
Y1 - 2014/11/6
N2 - In the last years extreme flood events occur more frequently in Vietnam. Conventional satellite altimeters offer high altimetric accuracy but with insufficient spatial and temporal resolution. Ground based instrumentation enables a high altimetric accuracy with high temporal resolution, but for a point location only. GNSS-Reflectometry (GNSS-R) reveals new perspectives for water level monitoring. To test the possibility of using this innovative technique as a gauge instrument, a two weeks lasting measurement campaign was conducted in Vietnam, in February 2012. The data analysis showed the presence of multipath effects other than the water level in the direct and the reflected signals that deteriorate the results. Using the Empirical Mode Decomposition method (EMD), the water reflections are isolated from further multipath. With a model of these reflections, a correlation of 0.84 instead of 0.67 between the GNSS-R calculated water level changes and the recorded water level changes from a gauge instrument could be reached. Furthermore, applying EMD improves the standard deviation of the determined water heights from 12cm to 5cm.
AB - In the last years extreme flood events occur more frequently in Vietnam. Conventional satellite altimeters offer high altimetric accuracy but with insufficient spatial and temporal resolution. Ground based instrumentation enables a high altimetric accuracy with high temporal resolution, but for a point location only. GNSS-Reflectometry (GNSS-R) reveals new perspectives for water level monitoring. To test the possibility of using this innovative technique as a gauge instrument, a two weeks lasting measurement campaign was conducted in Vietnam, in February 2012. The data analysis showed the presence of multipath effects other than the water level in the direct and the reflected signals that deteriorate the results. Using the Empirical Mode Decomposition method (EMD), the water reflections are isolated from further multipath. With a model of these reflections, a correlation of 0.84 instead of 0.67 between the GNSS-R calculated water level changes and the recorded water level changes from a gauge instrument could be reached. Furthermore, applying EMD improves the standard deviation of the determined water heights from 12cm to 5cm.
KW - Altimetry
KW - Empirical Mode Decomposition
KW - GNSS-Reflectometry
KW - Multipath
UR - http://www.scopus.com/inward/record.url?scp=84911459393&partnerID=8YFLogxK
U2 - 10.1109/igarss.2014.6947311
DO - 10.1109/igarss.2014.6947311
M3 - Conference contribution
AN - SCOPUS:84911459393
SP - 3798
EP - 3801
BT - 2014 IEEE International Geoscience & Remote Sensing Symposium
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - Joint 2014 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2014 and the 35th Canadian Symposium on Remote Sensing, CSRS 2014
Y2 - 13 July 2014 through 18 July 2014
ER -