Application Of Gfo-1 Radar Altimeter Data To Global Change Studies
Project Number: R/CE-008, Completion Report
Start Date: 7/1/2002
Completion Date: 9/30/2005
Revision Date: 3/20/2009
| Principal Investigator(s) | 1. | C.K. Shum Shum, Geodetic Science, School of Earth Science |
| Co-Principal Investigator(s) | 2. | Yuchan Yi, Geodetic Science, School of Earth Science |
Funding Record
| Source: Ohio Sea Grant College Program | |||
| Source Fund | State Match | Pass Through | |
| Total | $ 100,000.00 | $ 0.00 | $ 0.00 |
Objectives
The primary objectives of the proposed investigation include:
supporting LSA for assessment and validation of GFO-1 satellite and sensor performance;
recommending and development of necessary algorithm revisions for to improve GFO GDR processing;
verification of precise orbits and ionosphere corrections, and conduct the associated algorithm improvement including sea state bias;
attempt absolute calibration of GFO altimeter system in Lake Erie and develop techniques to link GFO to historic and current altimeter systems, including Geosat.
supporting LSA for assessment and validation of GFO-1 satellite and sensor performance;
recommending and development of necessary algorithm revisions for to improve GFO GDR processing;
verification of precise orbits and ionosphere corrections, and conduct the associated algorithm improvement including sea state bias;
attempt absolute calibration of GFO altimeter system in Lake Erie and develop techniques to link GFO to historic and current altimeter systems, including Geosat.
Rationale
In summary, the results indicate that (1) Estimated GFO MOE (GSFC) radial orbit accuracy is about 15 cm rms and Operational Doppler orbit accuracy is about 114 cm rms; (2) the geophysical and media corrections have been validated and are well within specifications. Wet troposphere correction from GFO MWR has negligible bias with 2.4 cm rms when compared with the NCEP model computed values. No appreciable problems were found in media and geophysical corrections. NGDR and IGDR MOE agree well with time tag, SWH, π0, AGC, solid tide and wet tropospheric correction. There are differences in ionospheric, dry tropospheric and ocean tide corrections because different models were adopted. NGDR MOE and OOD agree with time tag, SWH, π0, AGC and all corrections except ionosphere correction for the same reason (Shum et al., 2001); and (3) GFO NGDR data of cycle 21 and 22 are reasonably good except for day 328 (November 24), for which all products yield crossover rms higher than normal values without apparent reasons
Methodology
GFO sensor performance and measurement system validation and recommendation for algorithm improvements have been routinely carried out for the U.S. Navy by Ohio State University (http://geodesy.eng.ohio-state.edu/gfo). We intend to integrate this effort and further develop the capability to support the NOAA LSA GFO IGDR data products.
Our efforts include providing verification and improvement for the orbit, media, geophysical, and instrument corrections to U.S. Navy's Geosat-Followon-1 (GFO-1) mission radar altimeter data.
Publications & Media
| Peer-reviewed Publications | |
 | Calmant, S., K. Cheng, G. Jan, C. Kuo, C. Shum, Y. Yi, V. Ballu and M. Bouin 2004, Comparison of sea surface height derived from satellite altimetry and from ocean bottom pressure gauges: The SW Pacific MOTEVAS Project, Marine Geodesy, Special Issue on Jason-1 Calibration/Validation Part III |
 | Cheng, K. 2004, GPS buoy campaigns for vertical datum improvement and radar altimeter calibration, Ohio State University Geodetic Science and Surveying Report #470 Made available by Ohio Sea Grant as OHSU-TS-005. |
| Cheng, K 2004, Radar altimeter absolute calibration using GPS water level measurements Ohio State University Geodetic Science and Surveying Report #469. Made available by Ohio Sea Grant as OHSU-TS-057. |
| Kuo, C., C. Shum, A. Braun, and J. Mitrovica 2004, Vertical crustal motion inferred by satellite altimetry and tide gauge data in Fennoscandia Geophys. Res. Lett., Vol. 31 |
| Liebsch, G., K. Novotny, R. Dietrich, and C. Shum 2002, Comparison of multimission altimetric sea-surface heights with tide gauge observations in the Southern Baltic Sea Marine Geodesy |
| Shum, C., Y. Yi, K. Cheng, C. Kuo, A. Braun, S. Calmant and D. Chamber 2003, Calibration of Jason-1 altimeter over Lake Erie Marine Geodesy |
| Shum, C., C. Kuo, A. Braun, and Y. Yi 2002, 20th century sea level rise, a geophysical perspective Proc. 90th Journees Luxembourgeoises de Geodynamique, Council of Europe, European Network on Geodynamics, Luxembourg |
| Song, Y. T., C. Ji, L.-L. Fu, V. Zlotnicki, C.K. Shum, Y. Yi, and V. Hjorleifsdottir 2005, The 26 December 2004 Tsunami Source Estimated from Satellite Radar Altimetry and Seismic Waves Geophys Res. Lett. |
| Zhao, C., C. Shum and Y. Yi 2003, Calibration results of GFO, Satellite altimetry for geodesy, geophysics and oceanography International Association of Geodesy Symposia 126 |
| Newsletters & Periodicals | |
 | Yi, Y., A. Braun, C. Shum, K. Cheng and S. Calment 2003, Envisat RA2 cal/val results Envisat RA-2/MWR CCVT Sixth Plenary Meeting, ESA/ESRIN, Frascati, Italy |
| Yi, Y., A. Braun, K. Cheng, C. Shum, and S. Calmant 2002, Initial ENVISAT RA-2 Cal/Val results ENVISAT RA-MWR CCVT Fourth Plenary Meeting, ESA/ESRIN, Frascati, Italy |
| Presentations | |
 | Bouin, M., V. Ballu, S. Calmant, K. Cheng and C. Shum 2005, Monitoring local sea surface by onboard GPS, tide gauge data and satellite altimetry Geophysical Research Abstracts,General Assembly of the European Geosciences Union |
| Bouin, M., V. Ballu, S. Calmant, K. Cheng, C. Shum, and L. Testut 2003, Absolute height of sea surface vs trajectory of GPS antennae over submerged pressure gauges Trans. AGU, 84(46), Fall Meet. Suppl., Abstract OS42A-0832 |
| Braun, A., B. Csatho, C. Kuo and Y. Yi 2004, Icesat validation in the Great Lakes using tide gauge and radar altimetry data General Assembly EGU Symposium, Nice, France |
| Braun, A., C. Shum, L. Potts, C. Kuo, and A. Trupin 2003, Vertical motion and GIA in the Great Lakes region IUGG2003 |
| Braun, A., C. Shum, L. Potts, C. Kuo, and A. Trupin 2003, Glacial isostatic adjustment in the Great Lake region EGS-AGU-EUG Joint Assembly, Nice, France |
| Cheng, K., V. Ballu, M. Bouin, S. Calmant and C. Shum 2004, Absolute local sea surface in the Unuatu Archipelago from GPS, satellite altimetry and pressure gauge data Fall AGU Meeting, San Francisco |
| Calmant, S., K. Cheng, and C. Shum 2003, Sea level series and GPS surveys along the ground tracks of satellite altimeters overflying the tide gauges of the MOTEVAS project EGS-AGU-EUG Joint Assembly, Nice, France |
| Calmant, S., K. Cheng, C. Shum and D. Martin 2002, Radar altimeter absolute calibration using GPS buoy and tide gauges Fall AGU Meeting, San Francisco |
| Kuo, C.Y., C.K. Shum, A. Braun, and K. Heki 2006, Vertical crustal motion determined by satellite altimetry and tide gauges Western Pacific Geophysical Meeting (WPGM), Beijing, China |
| Kuo, C.Y. C.K. Shum, and A. Braun 2006, Determination of vertical motion combining satellite altimetry and tide gauges International workshop on coast and land applications of satellite altimetry, Beijing, China |
| Kuo, C., C.K. Shum, S.-C. Han, and J.J. Benjamin 2006, Mediterranean circulation and sea level using satellite altimetry and GRACE European Geosciences Union General Assembly 2006, Vienna, Austria |
| Kuo, C., S. Han, C. Shum and A. Braun 2004, Southern ocean sea level variations 2004 Envisat & ERS Symposium, Salzburg – Austria |
| Lee, H.K., C.K. Shum, Y. Yi, and C.Y. Kuo 2006, Application of satellite altimetry for solid Earth crustal deformation Studies Western Pacific Geophysical Meeting (WPGM), Beijing, China |
| Yi, Y., K. Cheng, C. Shum, A. Braun, and S. Calmant 2003, ENVISAT RA-2 calibration/validation EGS-AGU-EUG Joint Assembly, Nice, France |
| Shum, C.K., Y.T. Song, Y. Yi, M. Zhang, and A. Braun 2006, Observation and modeling of tsunami using satellite altimetry data and coupled ocean-Earthquake seismic inversion 13th Canadian Conference on Astronautics, Montreal, Canada |
| Shum, C.K., and C. Kuo 2006, 20th century global sea level rise: Its determination and cryospheric contribution European Geosciences Union General Assembly 2006, Vienna, Austria |
| Shum, C., C. Kuo, A. Braun, and A. Trupin 2003, Vertical motion inferred by satellite altimetry and tide gauges PARCA Meeting, Byrd Polar Research Center, Ohio State Univ |
| Shum, C., C. Kuo, and A. Braun 2002, Vertical crustal motion inferred by satellite altimetry and tide gauge International Symposium in Recent Crustal Deformations in South America and Sounding Areas, Santiago, Chile |
| Song, Y. T., C.K. Shum, L.-L. Fu, Y. Yi, and M. Zhang 2005, 2004 Indian Ocean tsunami detection and modeling using satellite altimetry and coupled ocean-earthquake seismic inversion IGARSS 2005 Symposium, Seoul, Korea |
| Song, Y. T., C. K. Shum, M.-M. Zhang, L.-L. Fu, and Y. Yi 2005, Detection and potential prediction of tsunami using satellite altimetry and OCGM forced by seismically-inverted sea floor uplifts Asia-Pacific Space Geodynamics Project Workshop: Geodynamics and Natural Hazards, Hong Kong Polytechnic University, Hong Kong, China |
| Yi, Y., K. Cheng, C. Shum, A. Braun and S. Calmant 2004, Lake Level Monitoring and Altimeter Calibration in the Great Lakes 2004 Envisat & ERS Symposium, Salzburg – Austria |
| Yi, Y., K. Cheng, C. Shum, A. Braun, S. Calmant and D. Chamber 2003, Calibration results of Jason-1 Poseidon-2 altimeter in Lake Erie and S. Pacific T/P-Jason SWT Meeting, Arles, France |
| Shum, C 2005, Determination of 20th Century sea level rise invited lecture, IGG, Wuhan, China |
| Shum, C 2005, Scientific research and applications using artificial satellites invited lecture, University of Linyi, Linyi, China |
| Shum, C. 2005, Global sea level change: an interdisciplinary science invited lecture, Institute of Geodesy & Engineering Survey, CAS, Beijing, China |
| Shum, C. 2005, Satellite Altimetry and Gravimetry for Earth Science Research IGARSS Tutorial, Seoul, Korean |
| Shum, C. 2005, Global sea level change: an interdisciplinary science invited lecture, Institute of Geodesy & Engineering Survey, CAS, Beijing, China |
| Shum, C. 2005, Satellite altimetry and gravimetry for Earth science studies invited lecture, Institute of Geodesy & Geophysics, Wuhan University, Wuhan, China |
| Shum, C. 2004, Principle of satellite altimetry: Applications to sea level studies Invited lecture, IOC/GLOSS Training Workshop on Sea Level Data Analysis, Kuala Lumper, Malaysia |
| Shum, C. 2004, GPS--Buoy for altimeter calibrations satellite altimetry for tide modeling Invited lecture, IOC/GLOSS Training Workshop on Sea Level Data Analysis, Kuala Lumper, Malaysia |
| Shum, C. 2004, 20th century sea level rise: Interdisciplinary research using satellite geodesy Invited lecture, Hong Kong Polytechnic University, Hong Kong, China |
Supported Students
 | Kai-Chien (Kevin) Cheng () Geodetic Science & Surveying, Ohio State University Thesis Title: Analysis of water level measurements using GPS |
| Chung-Yen Kuo () Ohio State University Thesis Title: Determination and characterization of 20th Century global sea level rise |
