Earth Observing Systems最新文献

Remote sensing of weather, climate, and environment (Conference Presentation) 天气、气候和环境遥感(会议报告)

Earth Observing Systems Pub Date : 2018-09-11 DOI: 10.1117/12.2323929

K. Klaes

引用次数: 0

Demonstrating Technologies for Hyperspectral Infrared Remote Sensing from Space on a CubeSat (Conference Presentation) 基于立方体卫星的空间高光谱红外遥感技术演示(会议报告)

Earth Observing Systems Pub Date : 2017-09-22 DOI: 10.1117/12.2278119

T. Pagano

引用次数: 0

Validation of VIIRS with CrIS by taking into account the sub-pixel cloudiness and viewing geometry (Conference Presentation) 考虑亚像素云量和视觉几何的CrIS VIIRS验证(会议报告)

Earth Observing Systems Pub Date : 2017-09-21 DOI: 10.1117/12.2273027

Jun Li, C. Cao, Zhenglong Li, X. Gong, Wenhui Wang, C. Moeller

{"title":"Validation of VIIRS with CrIS by taking into account the sub-pixel cloudiness and viewing geometry (Conference Presentation)","authors":"Jun Li, C. Cao, Zhenglong Li, X. Gong, Wenhui Wang, C. Moeller","doi":"10.1117/12.2273027","DOIUrl":"https://doi.org/10.1117/12.2273027","url":null,"abstract":"The Cross-track Infrared Sounder (CrIS) onboard Suomi NPP (SNPP) and JPSS series has high radiometric accuracy, which can be used for validating some infrared bands of Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the same platform. The collocated CrIS and VIIRS sensor data record (SDR) along with the VIIRS cloud mask product from 19 to 21 September 2016 (during a period of blackbody warm-up cool-down, or WUCD) are used for inter-comparisons. This study addresses the questions on how the sub-pixel cloud presence and the local zenith angle impact the radiometric differences between CrIS and VIIRS. Both VIIRS brightness temperature (BT) bias and standard deviation for I5, M13, M15 and M15 whose spectral response functions (SRFs) have the full coverages over the CrIS spectral regions, are analyzed over the clear and cloudy skies, respectively. Results show good agreement between VIIRS and CrIS, cloud presence has substantial impact on STD, and also impact on BIAS, local zenith angle has also substantial impact on STD, but impact on bias is small. Both bias and STD are large in DCC (deep convective cloud) areas. The study clearly shows the VIIRS scene temperature bias during WUCD, as well as the bias removal after reprocessing the M15 and M16 with the improved calibration bias correction algorithm. The methodology can be applied to monitor and validate the imager with advanced infrared (IR) sounder onboard the same platform, such as CrIS for VIIRS (SNPP, JPSS), IASI for AVHRR (Metop), and GIIRS for AGRI (FengYun-4).","PeriodicalId":118866,"journal":{"name":"Earth Observing Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115378700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Suomi-NPP visible infrared imaging radiometer suite (VIIRS) calibration uncertainty its effect on trends in the ocean color data record (Conference Presentation) Suomi-NPP可见光红外成像辐射计套件(VIIRS)校准不确定度及其对海洋颜色数据记录趋势的影响(会议报告)

Earth Observing Systems Pub Date : 2017-09-21 DOI: 10.1117/12.2274385

K. Turpie, R. Eplee, G. Meister, B. Franz

{"title":"Suomi-NPP visible infrared imaging radiometer suite (VIIRS) calibration uncertainty its effect on trends in the ocean color data record (Conference Presentation)","authors":"K. Turpie, R. Eplee, G. Meister, B. Franz","doi":"10.1117/12.2274385","DOIUrl":"https://doi.org/10.1117/12.2274385","url":null,"abstract":"The NASA Ocean Color calibration team continued to reanalyze and improve on their approach to the on-orbit calibration of the Visible Infrared Imaging Radiometer Suite (VIIRS), aboard the Suomi National Polar-orbiting Partnership (NPP) satellite, now five years into its Earth Observation mission. As the calibration was adjusted for changes in ocean band responsitivity with time, the team also observed the variance and autocorrelation properties of calibration trend fit residuals, which appeared to have a standard deviation within a few tenths of a percent. Autocorrelation was observed to be different between bands at the blue end of the spectrum and bands at the red/NIR end, which are affected by significant changes in responsitivity stemming from mirror contamination. This residual information offered insight into the effect of small calibration biases, which can cause significant trend uncertainties in regional time series of surface reflectance and derived products. This work involves modeling spurious trends that are inherent to the calibration over time and that also arise between reprocessing efforts because of extrapolation of the time-dependent calibration table. Uncertainty in calibration trends was estimated using models of instrument and calibration system trend artifacts and correlated noise models using Monte Carlo techniques. Combined table reprocessing and extrapolation biases are presented for the first time. Calibration trend uncertainty is then propagated through to ocean color remote sensing reflectance and chlorophyll-a concentration time series. The results quantify the smallest trend observable in these oceanic parameters. This quantification furthers our understanding of uncertainty in measuring regional and global biospheric trends in the ocean using VIIRS, and better defines the roles of records in climate research.","PeriodicalId":118866,"journal":{"name":"Earth Observing Systems","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116703981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Improvements in the calibration of the SNPP VIIRS day-night band (Conference Presentation) SNPP VIIRS昼夜波段校准的改进(会议报告)

Earth Observing Systems Pub Date : 2017-09-19 DOI: 10.1117/12.2272882

Junqiang Sun, Menghua Wang

引用次数: 0

Compact, on-demand broad spectral range (visible to long wave infrared) calibrator (Conference Presentation) 紧凑型，按需宽光谱范围(可见光到长波红外)校准器(会议报告)

Earth Observing Systems Pub Date : 2017-09-19 DOI: 10.1117/12.2276958

J. Chow, Edward Ward

引用次数: 0

Electronic crosstalk effect in SNPP VIIRS thermal emissive bands (Conference Presentation) SNPP VIIRS热辐射带中的电子串扰效应(会议报告)

Earth Observing Systems Pub Date : 2017-09-19 DOI: 10.1117/12.2272897

Junqiang Sun, Menghua Wang

{"title":"Electronic crosstalk effect in SNPP VIIRS thermal emissive bands (Conference Presentation)","authors":"Junqiang Sun, Menghua Wang","doi":"10.1117/12.2272897","DOIUrl":"https://doi.org/10.1117/12.2272897","url":null,"abstract":"The Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi National Polar-orbiting Partnership (SNPP) spacecraft has been on orbit for more than five years. Pronounced striping in Earth view (EV) images and obvious discontinuity in the EV brightness temperature (BT) of the thermal emissive bands (TEB) during the blackbody (BB) warm-up cool-down (WUCD) calibration have been found since launch but the root-cause of the phenomena has not yet been identified. Meanwhile, recent studies of the MODerate-resolution Imaging Spectroradiometer (MODIS) long-wave infrared (LWIR) photovoltaic (PV) bands demonstrate that crosstalk effect induces the same erroneous features. In this paper, it is shown that there is, indeed, a remarkable crosstalk contamination in SNPP VIIRS TEB. The crosstalk effect is quantitatively characterized by deriving the crosstalk coefficients from the scheduled lunar observations and the established lunar imagery analysis. Among all SNPP VIIRS TEB, band M14 is shown to have the largest crosstalk contamination from Band M15, while bands M13, M15, M16, and I5 have pronounced crosstalk effect as well. The crosstalk effect is distinctively different for the odd and even detectors within each affected band during to the pattern of the placement of the odd and the even detectors of the band on the focal plane assembly (FPA). The crosstalk coefficients are applied to mitigate the crosstalk effect and the improvements to both the BB calibration and EV retrieval are presented and addressed.","PeriodicalId":118866,"journal":{"name":"Earth Observing Systems","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128095633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Imaging gratings: Technology and applications for spectrometers (Conference Presentation) 成像光栅:光谱仪的技术与应用(会议报告)

Earth Observing Systems Pub Date : 2017-09-19 DOI: 10.1117/12.2275131

P. Triebel, T. Moeller, T. Diehl, A. Gatto, A. Pesch, Lars Erdmann, M. Burkhardt, Alexander Kalies

{"title":"Imaging gratings: Technology and applications for spectrometers (Conference Presentation)","authors":"P. Triebel, T. Moeller, T. Diehl, A. Gatto, A. Pesch, Lars Erdmann, M. Burkhardt, Alexander Kalies","doi":"10.1117/12.2275131","DOIUrl":"https://doi.org/10.1117/12.2275131","url":null,"abstract":"For imaging spectrometers beside the polarization sensitivity and efficiency the imaging quality of the diffraction grating is essential. Low aberration imaging quality of the grating is required not to limit the overall imaging quality of the instrument. The wavefront aberration of an optical grating is a combination of the substrate wavefront and the grating wavefront. During the manufacturing process of the grating substrate different processes can be applied in order to minimize the wavefront aberrations. The imaging performance of the grating is also optimized due to the recording setup of the holography and a special technique to apply blazed profiles also in photoresist of curved substrates. This technology of holographically manufactured gratings is used for transmission and reflection gratings on different types of substrates like prisms, convex and concave spherical and aspherical surface shapes, free-form elements. All the manufactured gratings are monolithic and can be coated with high reflection and anti-reflection coatings. Prism substrates were used to manufacture monolithic GRISM elements for the UV to IR spectral range preferably working in transmission. Besides of transmission gratings, numerous spectrometer setups (e.g. Offner, Rowland circle, Czerny-Turner system layout) working on the optical design principles of reflection gratings. The present approach can be applied to manufacture high quality reflection gratings for the EUV to the IR. In this paper we report our latest results on manufacturing lowest wavefront aberration gratings based on holographic processes in order to enable at least diffraction limited complex spectrometric setups over certain wavelength ranges. Beside the results of low aberration gratings the latest achievements on improving efficiency together with less polarization sensitivity and multi-band performance of diffractive gratings will be shown.","PeriodicalId":118866,"journal":{"name":"Earth Observing Systems","volume":"185 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122387237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AIRS visible light channels: Lessons from 15 years of using internal calibration sources, vicarious calibration, and the use of deep convective clouds (Conference Presentation) 空中可见光通道:15年来使用内部校准源、替代校准和使用深层对流云的经验教训(会议报告)

Earth Observing Systems Pub Date : 2017-09-19 DOI: 10.1117/12.2274552

S. Broberg, H. Aumann, E. Manning

引用次数: 0

Front Matter: Volume 9218 封面:第9218卷

Earth Observing Systems Pub Date : 1900-01-01 DOI: 10.1117/12.2086902

引用次数: 0