Nighttime polar cloud detection with modis

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Webb23 apr. 2015 · The opacity of clouds is the main problem for optical and thermal space-borne sensors, like the Moderate-Resolution Imaging Spectroradiometer (MODIS). Especially during polar nighttime, the low thermal contrast between clouds and the underlying snow/ice results in deficiencies of the MODIS cloud mask and affected … Webb25 feb. 2014 · We analyse the quality of MODIS LST and MODIS cloud detection over snow and ice. • MODIS LST is found to be severely cloud contaminated, with an overall RMSE = 5.3 K. • Only 26% of the successfully MODIS LST are acquired under actual clear-sky. • MODIS is strongly clod-biased during winter and slightly warm-biased during …

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Webb21 nov. 2008 · The daytime method uses the 0.65-, 3.8-, 10.8-, and 12.0-mum channels on the TRMM Visible and Infrared Scanner (VIRS) and the Terra and Aqua MODIS. The VIRS and Terra 1.6-mum channel and the Aqua 1.38- and 2.1-mum channels are used secondarily. The primary nighttime radiances are from the 3.8-, 10.8-, and 12.0- mum … WebbPolar Cloud and Snow Detection Two Aqua MODIS granules, covering part of the Arctic Ocean in daylight, and twilight and nighttime over Alaska, are shown in Fig. 5. All three polar masks were applied in this case. CMCM_Ed3 compares well with the MODIS RGB and 3.7 - 11 images. exterminator seffner

Nighttime polar cloud detection with MODIS - Polar Satellite ...

Webb24 dec. 2024 · Clear-sky mask (CSM) is a crucial influence on the calculating accuracy of the sensor radiometric biases for spectral bands of visible, infrared, and microwave regions. In this study, a fully connected deep neural network (FCDN) was proposed to generate CSM for the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard … WebbResults show that the current MODIS cloud mask algorithm performs well in polar regions during the day but does not detect more than 40% of the cloud cover over the … Webbboats can be detected with low light imaging data collected at night by imaging sensors flown on weather satellites. 978-1-6654-2792-0/22/$31.00 ©2024 IEEE 4779 IGARSS 2024 exterminators enumclaw wa

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Nighttime polar cloud detection with MODIS ESD Publications

Webb13 mars 2012 · The cloud feedback is the primary source of uncertainty in model simulations, especially in the polar regions. A better understanding of the interaction between sea ice and clouds, and specifically the impact of decreased sea ice on cloud cover, will provide valuable insight into the Arctic climate system and may ultimately … Webb• Updated nighttime polar cloud mask with improved cloud detection. Changed the cloud test over super cold plateau. Added MODIS clear-sky restore tests. • Improve twilight polar test be reducing brightness temperature difference and reflectance thresholds . • Implemented a daily moving transition definition between polar exterminators elk grove caWebbIn this paper, the cloud detection algorithm for the Moderate Resolution Imaging Spectrometer (MODIS) is evaluated with model simulations and satellite data collocated with radar/lidar observations at three Arctic and Antarctic stations. exterminator service in theclinton

"Webb18 okt. 2024 · 20-21 октября по всему миру пройдет хакатон Space Apps Challenge. Событие проходит как часть инкубационной программы NASA, так что все серьезно: участникам предоставят научные данные и ресурсы NASA,... " - Nighttime polar cloud detection with modis

Nighttime polar cloud detection with modis

A cloudier Arctic expected with diminishing sea ice

Webb1 feb. 2024 · Reliable measures of nighttime atmospheric fine particulate matter (PM2.5) concentrations are essential for monitoring their continuous diurnal variation. Here, we proposed a night PM2.5 concentration estimation (NightPMES) model based on the random forest model. This model integrates the radiance of the Visible Infrared Imaging … Webb13 okt. 2024 · The Continuity Moderate Resolution Imaging Spectroradiometer (MODIS)-Visible Infrared Imaging Radiometer Suite (VIIRS) Cloud Mask (MVCM) derives from a cloud detection algorithm applied to combined solar and infrared imager and sounder data from a polar orbiting satellite.

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Webbtype structure to analyze MODIS five-channel sensor data for 0.65, 1.6, 3.75, 11, and 12 µm together with the predicted clear sky values to identify clouds and snow and ice. … WebbCloud detection is the first step in studying the role of polar clouds in the global climate system with satellite data. In this paper, the cloud detection algorithm for the Moderate …

WebbCloud detection is the first step in studying the role of polar clouds in the global climate system with satellite data. In this paper, the cloud detection algorithm for the Moderate … WebbAn inter-comparison with the standard Moderate-resolution Imaging Spectroradiometer (MODIS) Land Surface Temperature product exhibits RMSEs and biases in the range of 0.6 to 0.9 and −0.5 to 0.2...

Webb1 juli 2008 · Abstract Significant improvements have been made to the Moderate Resolution Imaging Spectroradiometer (MODIS) cloud mask (MOD35 and MYD35) for … WebbResults show that the current MODIS cloud mask algorithm performs well in polar regions during the day but does not detect more than 40% of the cloud cover over the validation sights at night. Two new cloud tests utilizing the 7.2 mum water vapor and 14.2 mum carbon dioxide bands, one new clear-sky test using the 7.2 mum band, and changes to …

Webb22 okt. 2024 · With this update, you can now: Change the sleep timing of detected sleep or revert to the originally detected sleep. Add new sleep. Delete one sleep period at a …

WebbCloud detection is the first step in studying the role of polar clouds in the global climate system with satellite data. In this paper, the cloud detection algorithm for the Moderate … exterminator servicesWebbErrors in cloud detection over the Arctic using a satellite imager and implications for observing feedback mechanisms. Journal of Climate, 23 ( 7 ), 1894 – 1907. Liu, Y., Key, J. R., Frey, R. A., Ackerman, S. and Menzel, P. ( 2004 ). … exterminator sewardWebbin nighttime Moderate Resolution Imaging Spectroradiometer (MODIS) data. Cloud heights are determined from analysis of the 15-mmCO2 band data (i.e., the CO2-slicing … exterminator service near independence orWebbAbstract. Cloud detection is the first step in studying the role of polar clouds in the global climate system with satellite data. In this paper, the cloud detection algorithm for the Moderate Resolution Imaging Spectrometer (MODIS) is evaluated with model simulations and satellite data collocated with radar/lidar observations at three Arctic and Antarctic … exterminator services in liberty square njWebbThe monitoring efforts have focused on detection of thermal anomalies (“hot spots”) and ash clouds with TIR data acquired by legacy AVHR, EOS MODIS, and VIIRS instruments, flying on NASA/NOAA polar-orbiting satellites, and the GOES-West and Himawari-8 (operated by the Japan Meteorological Agency) series of geostationary satellites. exterminator sevierville tnWebbVolcanic ash cloud detection was. Mount Semeru is one of the most active volcanoes in the Java Island. This article presents the results of observations and detections of … exterminator sewaneeWebb15 aug. 2004 · It will be shown that nighttime cloud detection in polar regions with MODIS can achieve a high level of accuracy and is far more robust than what may be … exterminator services clive ia