Knowledge Resource Center for Ecological Environment in Arid Area
CALIBRATION EFFORTS FOR MWR ON-BOARD SAC-D/AQUARIUS MISSION | |
Bruscantini, Cintia A.; Maas, Martin; Grings, Francisco; Karszenbaum, H. | |
通讯作者 | Bruscantini, Cintia A. |
会议名称 | 13th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) |
会议日期 | MAR 24-27, 2014 |
会议地点 | Pasadena, CA |
英文摘要 | The Microwave Radiometer (MWR) on board the SACD/Aquarius mission, launched on June 2011, is a Dicke radiometer operating at 23.8 GHz (H-Pol) and 36.5 GHz (H/V/+45/-45-Pol). MWR channels are useful to provide ancillary data for the various retrievals to be performed with Aquarius regarding ocean and land applications. In this study we report the calibration results obtained by a land cross-calibration between Windsat and MWR. Results were generated for the 2011-2012 period and using the version V5.0S of the MWR data. Radiometer inter-comparison over selected homogeneous targets is widely used for calibration assessment and data quality evaluation. The methodology lays on the temporal stability of the selected targets and their homogeneity in terms of brightness temperature (Tb), so that radiometers with similar characteristics (frequency, polarization, incidence angle) should observe the same Tb when passing over the target within a short temporal window. Differences on observed Tbs are associated to a poor calibration of the instrument under study. The cross-calibration is an adjustment of the Tb data of the radiometer under study to match the Tb data of the already calibrated radiometer. In this study, linear adjustments are applied for each MWR beams of its three channels to match Windsat observations. In order to examine the entire dynamic range of land observations, 19 homogeneous targets were selected for cross-calibration. These targets have been previously selected for quality assessment of AMSR-E data [1]. Targets include tropical and boreal forests, desert, grassland and Sahel. Overall, it was found that the instrument compares favorably to Windsat over land targets. Nevertheless, certain issues to be resolved are identified and corrections are proposed. |
英文关键词 | MWR Windsat cross calibration co-location |
来源出版物 | 2014 13TH SPECIALIST MEETING ON MICROWAVE RADIOMETRY AND REMOTE SENSING OF THE ENVIRONMENT (MICRORAD) |
出版年 | 2014 |
页码 | 181-186 |
EISBN | 978-1-4799-4644-0 |
出版者 | IEEE |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | Argentina |
收录类别 | CPCI-S |
WOS记录号 | WOS:000345894600040 |
WOS关键词 | RADIOMETER ; WINDSAT |
WOS类目 | Geosciences, Multidisciplinary ; Remote Sensing ; Physics, Applied |
WOS研究方向 | Geology ; Remote Sensing ; Physics |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/302624 |
作者单位 | Inst Astron & Space Phys IAFE, Buenos Aires, DF, Argentina |
推荐引用方式 GB/T 7714 | Bruscantini, Cintia A.,Maas, Martin,Grings, Francisco,et al. CALIBRATION EFFORTS FOR MWR ON-BOARD SAC-D/AQUARIUS MISSION[C]:IEEE,2014:181-186. |
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