Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1117/12.2223809 |
Response versus scan-angle corrections for MODIS reflective solar bands using deep convective clouds | |
Bhatt, Rajendra1; Angal, Amit1; Doelling, David R.2; Xiong, Xiaoxiong3; Wu, Aisheng1; Haney, Conor O.1; Scarino, Benjamin R.1; Gopalan, Arun1 | |
通讯作者 | Bhatt, Rajendra |
会议名称 | Conference on Earth Observing Missions and Sensors - Development, Implementation, and Characterization IV |
会议日期 | APR 04-07, 2016 |
会议地点 | New Delhi, INDIA |
英文摘要 | The absolute radiometric calibration of the reflective solar bands (RSBs) of Aqua-and Terra-MODIS is performed using on-board calibrators. A solar diffuser (SD) panel along with a solar diffuser stability monitor (SDSM) system, which tracks the degradation of the SD over time, provides the baseline for calibrating the MODIS sensors. MODIS also views the moon and deep space through its space view (SV) port for lunar-based calibration and computing the background, respectively. The MODIS instrument views the Earth's surface using a two-sided scan mirror, whose reflectance is a function of the angle of incidence (AOI) and is described by response versus scan-angle (RVS). The RVS for both MODIS instruments was characterized prior to launch. MODIS also views the SD and the moon at two different AOIs. There is sufficient evidence that the RVS is changing on orbit over time and as a function of wavelength. The SD and lunar observation scans can only track the RVS variation at two AOIs. Consequently, the MODIS Characterization Support Team (MCST) developed enhanced approaches that supplement the onboard calibrator measurements with responses from the pseudo-invariant desert sites. This approach has been implemented in Level 1B (L1B) Collection 6 (C6) for select short-wavelength bands. This paper presents an alternative approach of characterizing the mirror RVS to derive the time-dependent RVS correction factors for MODIS RSBs using tropical deep convective cloud (DCC) targets. An initial assessment of the DCC response from Aqua-MODIS band 1 C6 data indicates evidence of RVS artifacts, which are not uniform across the scans and are more prevalent at the beginning of the earth-view scan. |
英文关键词 | MODIS RVS mirror response DCC |
来源出版物 | EARTH OBSERVING MISSIONS AND SENSORS: DEVELOPMENT, IMPLEMENTATION, AND CHARACTERIZATION IV |
ISSN | 0277-786X |
出版年 | 2016 |
卷号 | 9881 |
EISBN | 978-1-5106-0122-2 |
出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | USA |
收录类别 | CPCI-S |
WOS记录号 | WOS:000385792900035 |
WOS关键词 | CALIBRATION ; STABILITY |
WOS类目 | Engineering, Electrical & Electronic ; Remote Sensing ; Optics ; Imaging Science & Photographic Technology |
WOS研究方向 | Engineering ; Remote Sensing ; Optics ; Imaging Science & Photographic Technology |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/305448 |
作者单位 | 1.SSAI, One Enterprise Pkwy Ste 200, Hampton, VA 23666 USA; 2.NASA Langley Res Ctr, 21 Langley Blvd MS 420, Hampton, VA 23681 USA; 3.NASA Goddard Space Flight Ctr, 8800 Greenbelt Rd,MS 618, Greenbelt, MD 20771 USA |
推荐引用方式 GB/T 7714 | Bhatt, Rajendra,Angal, Amit,Doelling, David R.,et al. Response versus scan-angle corrections for MODIS reflective solar bands using deep convective clouds[C]:SPIE-INT SOC OPTICAL ENGINEERING,2016. |
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