نتایج جستجو برای: cirrus hd

تعداد نتایج: 21322  

2014
Jaehwa Lee N. Christina Hsu Corey Bettenhausen Andrew M. Sayer

[1] A strategy for retrieving aerosol optical depth (AOD) under conditions of thin cirrus coverage from the Moderate Resolution Imaging Spectroradiometer (MODIS) is presented. We adopt an empirical method that derives the cirrus contribution to measured reflectance in seven bands from the visible to shortwave infrared (0.47, 0.55, 0.65, 0.86, 1.24, 1.63, and 2.12 μm, commonly used for AOD retri...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2002
Bo-Cai Gao Ping Yang Wei Han Rong-Rong Li Warren J. Wiscombe

The Moderate Resolution Imaging SpectroRadiometer (MODIS) on the Terra Spacecraft has a channel near 1.38 m for remote sensing of high clouds from space. The implementation of this channel on MODIS was primarily based on previous analysis of hyperspectral imaging data collected with the Airborne Visible Infrared Imaging Spectrometer (AVIRIS). In this paper, we describe an algorithm to retrieve ...

2016
Sirel Gür Güngör Ahmet Akman Ali Küçüködük Meriç Çolak

Although the assessment of peripapillary retinal nerve ber layer (RNFL) thickness is essential in the diagnosis and management of glaucoma, its objective evaluation remains a challenge in clinical practice.1 Quantitative measurements of RNFL thickness have become possible with the development of imaging technologies such as optical coherence tomography (OCT). Several authors have shown that the...

2016
Kohei Arai Masanori Sakashita

Cirrus cloud detection accuracy of GOSAT/CAI and Landsat-8 is evaluated with a ground based Laser Radar: Lidar data and sky view camera data. Also, the evaluation results are confirmed with Calipso data together with a topographic representation of vertical profile of cloud structure. Furthermore, origin of cirrus clouds is estimated with forward trajectory analysis. The results show that GOSAT...

2004
Jennifer M. Comstock Christian Jakob

[1] Cirrus clouds play an important role both radiatively and dynamically in the tropics. Understanding the mechanisms responsible for the formation and persistence of tropical cirrus is an important step in accurately predicting cirrus in forecast and climate models. In this study, we compare ground-based measurements of cloud properties with those predicted by the ECMWF model at a location in...

2017
Ibrahim Kocak Hacı Koc Hakan Baybora Faruk Kaya Ali Aydın

This study aims to assess the effectiveness of ganglion cell-inner plexiform layer (GCIPL) measurements in preperimetric glaucoma (PPG) and primary open angle glaucoma (POAG). GCIPL and retinal nerve fiber layer (RNFL) thickness were measured in PPG, POAG, and control groups. The data obtained from these three groups were compared with analysis of variance and post hoc Tukey test. Average GCIPL...

2016
Matthias Tesche Peggy Achtert Paul Glantz Kevin J Noone

Determining the effects of the formation of contrails within natural cirrus clouds has proven to be challenging. Quantifying any such effects is necessary if we are to properly account for the influence of aviation on climate. Here we quantify the effect of aircraft on the optical thickness of already-existing cirrus clouds by matching actual aircraft flight tracks to satellite lidar measuremen...

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