Validation of the “HY-2” altimeter wet tropospheric path delay correction based on radiosonde data

WANG Jin; ZHANG Jie; FAN Chenqing; WANG Jing

doi:10.1007/s13131-014-0473-y

基于探空仪数据的HY-2高度计湿对流层校正量检验

doi: 10.1007/s13131-014-0473-y

1.
Ocean University of China, Qingdao 266003, China;Qingdao University, Qingdao 266071, China
2.
The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
3.
Ocean University of China, Qingdao 266003, China

基金项目: The Marine Public Welfare Project of China under contract No. 201105032-1; the National High-Tech Project of China under contract No. 2013AA09A505.

计量
- 文章访问数: 1525
- HTML全文浏览量: 39
- PDF下载量: 1323
- 被引次数: 0
出版历程
- 收稿日期: 2013-03-05
- 修回日期: 2013-10-25

Validation of the “HY-2” altimeter wet tropospheric path delay correction based on radiosonde data

1.
Ocean University of China, Qingdao 266003, China;Qingdao University, Qingdao 266071, China
2.
The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
3.
Ocean University of China, Qingdao 266003, China

摘要

摘要: 湿对流层延迟是大气中水汽和云液水的折射效应所导致的高度计海面高度测量中的修正项。HY-2卫星搭载一个工作频率为18.7GHz、 23.8GHz 和 37GHz的校正辐射计，以对湿对流层延迟进行修正。本文利用2011年10月至 2012年8月期间的10个无线电探空仪站同步测量的大气廓线计算了路径延迟量，对HY-2校正辐射计的测量结果进行了比对与检验。数据匹配的时间窗口为1h。为了避免陆地污染，采用不同的空间窗口对数据进行匹配，获得了湿对流层校正RMS误差与空间匹配窗口的经验函数，并将该函数外推到校正辐射计数据和探空仪数据时空完全匹配的理想情况。文章同时研究了HY-2校正辐射计亮温数据的稳定性及其对湿对流层校正的影响，最终得到校正辐射计湿对流层延迟算法误差为2.1cm。
- 路径延迟,海洋2卫星,无线电探空仪,微波辐射计,亮温
Abstract: Wet tropospheric path delay (PD) is a highly variable term for the altimeter measurement of a sea surface height, caused by the refraction effect of atmospheric water vapor and cloud liquid water. In order to estimate PD values, the "HY-2" system includes a calibration microwave radiometer (CMR) operating at 18.7, 23.8 and 37 GHz. The PD data of the CMR were compared and validated by coincident radiosonde profiles from ten globally distributed radiosonde stations during October 2011 to August 2012. The temporal interval was 1 h. In order to avoid land contamination, different spatial intervals between these two data sets were tested. The empirical fit function of PD uncertainty and spatial interval was found and extrapolated to the ideal situation that the data of CMR and radiosonde were totally coincident. The stability of the brightness temperature of the CMR and its impact on the PD correction was also studied. Consequently, the uncertainty of the PD algorithm of the CMR was estimated to be 2.1 cm.
- path delay

HTML全文

参考文献(13)

Alishouse J C. 1990. Determination of oceanic total precipitable water from SSM/I. IEEE Trans Geosci Remote Sens, 28(5): 811-816

Brown S T. 2010. A novel near-land radiometer wet path-delay retrieval algorithm: application to the Jason-2/OSTM advanced microwave radiometer. IEEE Trans Geosci Remote Sens, 8(4): 1986-1992

Brown S T, Ruf C S. 2005. Determination of an Amazon hot reference target for the on-orbit calibration of microwave radiometers. Journal of Atmospheric and Oceanic Technology, 22(9): 1340- 1352

Brown S, Ruf C, Keihm S, et al. 2004. Jason microwave radiometer performance and on-orbit calibration. Marine Geodesy, 27(1): 199-220

Chen Chuntao, Zhu Jianhua, Lin Mingsen, et al. 2013. The validation of the significant wave height product of HY-2 altimeter-primary results. Acta Oceanol Sin, 32(11): 82-86

Durre I, Vose R S, Wuertz D B. 2006. Overview of the integrated global radiosonde archive. Journal of Climate, 19(1): 53-68

Dettmering D, Bosch W. 2010. Global Calibration of Jason-2 by Multi- Mission Crossover Analysis. Marine Geodesy, 33(1): 150-161

Fu L L, Cazenave A. 2001. Satellite Altimetry and Earth Sciences. San Diego: Academic Press, 407-435

Jiang Xingwei, Lin Mingsen, Liu Jianqiang, et al. 2012. The "HY-2" satellite and its preliminary assessment. International Journal of Digital Earth, 5(3): 266-281

Keihm S J, Janssen M A, Ruf C S. 1995. TOPEX/Poseidon microwave radiometer (TMR): III. Wet troposphere range correction algorithm and pre-launch uncertainty budget. IEEE Trans Geosci Remote Sens, 33(1): 147-160

Ruf C S. 2000. Detection of calibration drifts in spaceborne microwave radiometers using a vicarious cold reference. IEEE Trans Geosci Remote Sens, 38(1): 44-52

Stum J, Sicard P, Carrere L. 2010. Combining all flying microwave radiometers to compute the water vapor path delay for altimeter missions. In: Microwave Radiometry and Remote Sensing of the Environment (MicroRad), 11th Specialist Meeting. Washington, DC, USA: IEEE, 230-235

Wang Jichao, Zhang Jie, Yang Jungang. 2013. The validation of HY-2 altimeter measurements of a significant wave height based on buoy data. Acta Oceanol Sin, 32(11): 87-89

施引文献

资源附件(0)

访问统计

点击查看大图

计量

文章访问数: 1525
HTML全文浏览量: 39
PDF下载量: 1323
被引次数: 0

基于探空仪数据的HY-2高度计湿对流层校正量检验

doi: 10.1007/s13131-014-0473-y

计量

出版历程

Validation of the “HY-2” altimeter wet tropospheric path delay correction based on radiosonde data

计量

出版历程

目录