NASA EOS Terra and Aqua MODIS on-orbit performance

Xiong, X.; Chiang, K.; Sun, Junqiang; Barnes, William; Guenther, B.; Salomonson, V. V.

doi:10.1016/j.asr.2008.04.008

Cited by 92 publications

(37 citation statements)

References 13 publications

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“…More details on this distinction will be given in section 2.3.5. Corlay et al, 2000;Sourdeval et al, 2012) are chosen for the thermal infrared channels (centred at 8.65, 10.60 and 12.05 μm) and those from the MODerate resolution Imaging Spectroradiometer (MODIS) on board Aqua (Xiong et al, 2009) for the visible and near-infrared channels (centred at 0.85 and 2.13 μm, respectively). The choice of IIR over MODIS for providing the thermal infrared measurements is made for reasons of consistency with the authors' previous study, but also due to the current need for lidar information for positioning cloud layers.…”

Section: Measurements and Retrieved Parametersmentioning

confidence: 99%

A methodology for simultaneous retrieval of ice and liquid water cloud properties. Part I: Information content and case study

Sourdeval

C.‐Labonnote

Baran

et al. 2014

Quart J Royal Meteoro Soc

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This article presents a novel methodology dedicated to retrieving the optical and microphysical properties of ice and liquid water clouds simultaneously. An optimal estimation method is used to retrieve the ice water path of one ice-cloud layer and the optical thickness and droplet effective radius of up to two liquid-water cloud layers, along with rigorous uncertainties. In order to perform the retrievals, radiometric measurements in five channels ranging from the visible to the thermal infrared are utilized. The position of cloud layers is currently provided by lidar information, which narrows the retrievals to its track. In the first part of this article, theoretical information content analyses are performed under different atmospheric conditions, over an oceanic surface. This type of analysis quantifies prior to the retrievals the amount of information that should be available regarding each parameter to be retrieved and helps to identify which set of channels provides this information. It is observed that strong information can be expected for retrieving each parameter in double-layer cases, while yet stronger limitations appear in triple-layer cases. In the second part of this article, our methodology is applied to a case study. In agreement with a priori expectations, accurate retrievals of ice and liquid cloud properties are obtained. These results are later compared with the products of a single-layer retrieval method, CloudAerosol Lidar with Orthogonal Polarization (CALIOP) operational products and in situ estimates. We show that a much better consistency with the latter two is found when retrieving the properties of each layer simultaneously. However, further statistical analyses and comparisons with various operational products should be undertaken for validation of the methodology. Such results will be presented in the second part of this study.

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Section: Measurements and Retrieved Parametersmentioning

confidence: 99%

A methodology for simultaneous retrieval of ice and liquid water cloud properties. Part I: Information content and case study

Sourdeval

C.‐Labonnote

Baran

et al. 2014

Quart J Royal Meteoro Soc

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“…A Tabela 1, seguinte, mostra as principais características dos produtos MODIS utilizadas neste estudo. As imagens MODIS são obtidas gratuitamente na web site do MODIS (Xiong et al, 2009;LPDAAC, 2012). Dos produtos do MODIS foram extraídos 349 pixels distribuídos aleatoriamente sobre a serra para ser usados como entradas no MTCLIM e calcular o balanço de radiação.…”

Section: Methodsunclassified

“…A temperatura do ar pode ser estimada facilmente utilizando-se um MED fornecido por satélites artificiais (Cavalcanti et al, 2006;Lopes et al, 2011). O albedo e a temperatura da superfície são fornecidos dos produtos dos satélites Terra e Aqua do sensor MODIS (Xiong et al, 2009) ou calculados de cenas do Landsat (Silva et al, 2005;Di Pace et al, 2008). A radiação solar global pode ser estimada pontualmente (Fietz & Fisch, 2009) ou por meio de imagens de satélite utilizando-se algoritmos, como os descritos por Santos & Silva (2010) e Allen et al (2007).…”

Section: Introductionunclassified

Simulação do saldo de radiação na Serra da Mantiqueira

Lopes

Valeriano²,

Silva³

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMOA influência do desmatamento da Mata Atlântica sobre o microclima da Serra da Mantiqueira ainda não é totalmente compreendida. Para conhecer as consequências do desmatamento sobre o clima serrano é necessário realizar estudos sobre o balanço de radiação na superfície. A falta de dados possibilita conjugar imagens de satélite com dados meteorológicos em um Sistema de Informação Geográfica na determinação do balanço de radiação. O presente estudo teve por objetivo avaliar o modelo MTCLIM em dias de céu claro ou nublado para simular o balanço de radiação na Serra da Mantiqueira, divisa entre os estados de São Paulo, Minas Gerais e Rio de Janeiro, Brasil. Imagens diárias, semanais e dezesseis dias do sensor MODIS disponíveis em 2003 foram utilizadas em rotinas específicas do MTCLIM. Alvos específicos foram selecionados para avaliar o comportamento do balanço de radiação. Observou-se que o balanço de radiação acompanhou a topografia local e é influenciado pelo tipo de uso da terra. Conclui-se que a temperatura da superfície contribui para aumentar a temperatura do ar implicando em diminuição do balanço de radiação sobre pastagem. O modelo MTCLIM demonstrou boa correlação para a temperatura do ar (R² = 0,82) e para a radiação solar global (R² = 0,71). Palavras-chave: modis, desmatamento, MTCLIM, krigagemSimulation of net radiation in the Mantiqueira mountain ABSTRACT The influence of deforestation of the Atlantic Forest on the microclimate of the mountain Mantiqueira is not yet fully understood. To understand the consequences of deforestation on the highland climate research is needed about the surface radiation balance. The lack of data allows combining satellite images with meteorological data in a Geographic Information System in determining the radiation balance. The study aimed to evaluate the MTCLIM model in cloudless days or cloudy sky and simulate the radiation balance in the Mantiqueira mountain, between São Paulo, Minas Gerais and Rio de Janeiro, Brazil. Daily images, weekly and sixteen days MODIS available in 2003 were used in specific routines from MTCLIM. Specific targets were selected to evaluate the behavior of the radiation balance. It was observed that the radiation balance followed the local topography and is influenced by the type of land use. It follows that the surface temperature contributes to elevate the air temperature, resulting in lesser radiation balance on pasture. The MTCLIM model showed good correlation for air temperature (R² = 0.82) and solar radiation (R² = 0.71).

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“…For the bands that experience either electronic crosstalk or an optical leak, additional correction algorithms are designed and applied to mitigate the impact on both the calibration and retrieval. More details of MODIS calibration methodologies can be found from MCST publications [4,5].…”

Section: Calibration Methodsologiesmentioning

confidence: 99%

MODIS radiometric calibration program, methods and results

Xiong

Guenther

Angal

et al. 2012

2012 IEEE International Geoscience and Remote Sensing Symposium

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As a key instrument for NASA's Earth Observing System (EOS), the Moderate Resolution Imaging Spectroradiometer (MODIS) has made significant contributions to the remote sensing community with its unprecedented amount of data products continuously generated from its observations and freely distributed to users worldwide. MODIS observations, covering spectral regions from visible (VIS) to long-wave infrared (LWIR), have enabled a broad range of research activities and applications for studies of the earth's interactive system of land, oceans, and atmosphere. In addition to extensive pre-launch measurements, developed to characterize sensor performance, MODIS carries a set of on-board calibrators (OBC) that can be used to track onorbit changes of various sensor characteristics. Most importantly, dedicated and continuous calibration efforts have been made to maintain sensor data quality. This paper provides an overview of the MODIS calibration program, on-orbit calibration activities, methods, and performance. Key calibration results and lessons learned from the MODIS calibration effort are also presented in this paper.

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NASA EOS Terra and Aqua MODIS on-orbit performance

Cited by 92 publications

References 13 publications

A methodology for simultaneous retrieval of ice and liquid water cloud properties. Part I: Information content and case study

A methodology for simultaneous retrieval of ice and liquid water cloud properties. Part I: Information content and case study

Simulação do saldo de radiação na Serra da Mantiqueira

MODIS radiometric calibration program, methods and results

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