Nighttime polar cloud detection with modis

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Webb1 juli 2008 · Abstract Significant improvements have been made to the Moderate Resolution Imaging Spectroradiometer (MODIS) cloud mask (MOD35 and MYD35) for … Webb15 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 …

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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. … WebbIn 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. constance fortin

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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 … WebbThe twilight cloud detection scheme utilizes the reflected solar components at 1.6, 2.1 and 3.75 micron in addition to the BTDs. Comparison of the results from the improved nighttime and twilight polar cloud masks with the Micropulse Lidar (MPL) observations at South Pole and Barrow, Alaska shows good agreement. Webb1 aug. 2024 · A shortcoming of our fog/low-cloud detection algorithm is that MODIS or other infrared measurements cannot probe through multilayered clouds. Also, the CALIPSO ’s lidar signal that we use for validation is … constance ephelia resort package

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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 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 … edna andrews dukeWebbVolcanic 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 … edna andrews rate my professor

"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... " - Nighttime polar cloud detection with modis

Nighttime polar cloud detection with modis

WebbUniversity of Wisconsin–Madison WebbWith the new cloud detection procedure, the misidentification of cloud as clear decreases from 44.2% to 16.3% at the two Arctic stations, and from 19.8% to 2.7% at the Antarctic …

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WebbErrors 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 ). … WebbAbstract. 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 …

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 … WebbNighttime polar cloud detection with MODIS - Polar Satellite ... EN. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk ... Nighttime polar cloud detection with MODIS - Polar Satellite ...

WebbCloud classification of satellite radiance data by multicategory support vector machines. JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY, 21(2), 159-169. Liu, YH, Key, JR, Frey, RA, Ackerman, SA, Menzel, WP (2004). Nighttime polar cloud detection with MODIS. REMOTE SENSING OF ENVIRONMENT, 92(2), 181-194. Webbin nighttime Moderate Resolution Imaging Spectroradiometer (MODIS) data. Cloud heights are determined from analysis of the 15-mmCO2 band data (i.e., the CO2-slicing …

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 …

WebbIn 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. constance glayWebbAbstract. 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 … edna andrews obituaryWebb13 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 … edna and john w mosley p-8