The validation of HY-2 altimetermeasurements of a significant wave height based on buoy data

WANG Jichao; ZHANG Jie; YANG Jungang

doi:10.1007/s13131-013-0382-5

Article Contents

Article Navigation > Acta Oceanologica Sinica > 2013 > 32(11): 87-90

WANG Jichao, ZHANG Jie, YANG Jungang. The validation of HY-2 altimetermeasurements of a significant wave height based on buoy data[J]. Acta Oceanologica Sinica, 2013, 32(11): 87-90. doi: 10.1007/s13131-013-0382-5

Citation:

WANG Jichao, ZHANG Jie, YANG Jungang. The validation of HY-2 altimetermeasurements of a significant wave height based on buoy data[J]. Acta Oceanologica Sinica, 2013, 32(11): 87-90. doi: 10.1007/s13131-013-0382-5

Citation:

PDF( 1893 KB)

The validation of HY-2 altimetermeasurements of a significant wave height based on buoy data

doi: 10.1007/s13131-013-0382-5

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100049, China;College of Science, China University of Petroleum, Qingdao 266580, China
2.
First Institute of Oceanography, State Oceanic Administration (SOA), Qingdao 266061, China

Received Date: 2012-12-10
Rev Recd Date: 2013-03-04

Abstract

Abstract

HY-2 has been launched by China on August 16, 2011 which assembles multi-microwave remote sensing payloads in a body and has the ability of monitoring ocean dynamic environments. The HY-2 satellite data need to be calibrated and validated before being put into use. Based on the in-situ buoys fromthe National Data Buoy Center (NDBC), Ku-band significant wave heights (SWH, hs) of HY-2 altimeter are validated. Eleven months of HY-2 altimeter Level 2 products data are chose from October 1, 2011 to August 29, 2012. Using NDBC 60 buoys yield 902 collocations for HY-2 by adopting collocation criteria of 30 min for temporal window and 50 km for a spatial window. An overall RMS difference of the SWH between HY-2 and buoy data is 0.297 m. A correlation coefficient between these is 0.964. An ordinary least squares (OLS) regression is performed with the buoy data as an independent variable and the altimeter data as a dependent variable. The regression equation of hs is h_s(HY-2)=0.891×h_s (NDBC)+0.022. In addition, 2016 collocations are matched with temporal window of 30min at the crossing points of HY-2 and Jason-2 orbits. RMS difference of Ku-band SWH between the two data sets is 0.452 m.
- altimeter,
- buoy,
- significant wave height,
- validation,
- regression analysis

FullText(HTML)

References(17)

References

Caires S, Sterl A. 2003. Validation of ocean wind and wave data using triple collocation. Journal of Geophysical Research, 108(C3): 3098, doi: 10.1029/2002JC001491

Carter D J T, Challenor P G, Srokosz M A. 1992. An assessment of Geosat wave height and wind speed measurements. Journal of Geophysical Research, 97(C7): 11383-11392

Cotton P D, Challenor P G, Carter D J T. 1997. An assessment of the accuracy and reliability of Geosat, ERS-1, ERS-2 and Topex altimeter measurements of wave height and wind speed. In: Proc. CEOS Wind and wave validation Workshop. European Space Research and Technology Centre (ESTEC), 81-95

Deng X, Coleman R, FeatherstoneWE, et al. 2009. Assessment of geoid models offshore western australia using in-situ measurements. Journal of Coastal Research, 25(3): 581-588, doi: 10.2112/07- 0972.1

Dobson E B, Monaldo F, Goldhirsh J. 1987. Validation of Goesat altimeter-derives wind speeds and significant wave heights using buoy data. Journal of Geophysical Research, 92: 10719- 10731

Durrant T H, Greenslade D J M, Simmonds I. 2009. Validation of Jason-1 and envisat remotely sensed wave heights. Journal of Atmospheric and Oceanic Technology, 26: 123-134

Gommenginger C P, Srokosz M A, Challenor P G. 2002. Development and validation of altimeter wind speed algorithms using an extended collocated buoy/Topex data set. IEEE Transactions on Geoscience and Remote Sensing, 40(2): 251-260

Gower J F R. 1996. Intercalibration of wave and wind data from TOPEX/POSEIDON and moored buoys off the west coast of Canada. Journal of Geophysical Research, 101: 3817-3829

Hwang P A, Teague W J, Jacobs G A, et al. 1998. A statistical comparison of wind speed, wave height and wave period derived from satellite altimeters and ocean buoys in the Gulf of Mexico region. Journal of Geophysical Research, 103: 10451-10468

Kshatriya J, Sarkar A, Kumar R. 2001. Comparison of TOPEX/POSEIDON altimeter derived wind speed and wave parameters with ocean buoy data in the north Indian Ocean. Marine Geodesy, 24(3): 131-138

Monaldo F. 1988. Expected differences between buoy and radar altimeter estimates of wind speed and significant wave height and their implications on buoy altimeter comparisons. Journal of Geophysical Research, 93: 2285-2302

Queffeulou P. 2003. Validation of ENVISAT RA-2 and JASON-1 altimeter wind and wave measurements. IEEE International Geoscience and Remote Sensing Symposium, 5: 2987-2989

Queffeulou P. 2004. Long term validation of wave height measurements from altimeters. Marine Geodesy, 27: 495-510, doi: 10.1080/01490410490883478

Ray R D, Beckley B D. 2003. Simultaneous ocean wave measurements by the Jason and Topex satellites with buoy and model comparisons. Marine Geodesy, 26: 367-382, doi: 10.1080/714044527

TrauthMH. 2007. MATLAB Recipes for Earth Sciences. 2nd ed. Berlin: Springer Verlag, 288

Zhao Dongliang, Li Shuiqing, Song Chaoyang. 2012. The comparison of altimeter retrieval algorithms of the wind speed and the wave period. Acta Oceanological Sinica, 31(3): 1-9, doi: 10.1007/s13131-012-0201-4

Zieger S, Vinoth J, Young I R. 2009. Joint calibration of multiplatform altimeter measurements of wind speed and wave height over the past 20 years. Journal of Atmospheric and Oceanic Techology, 26: 2549-2564, doi: 10.1175/2009JTECHA1303.1

Relative Articles

Supplements(0)

Cited By

Proportional views