Retrieving cloud top height in the JEM-EUSO cosmic-ray observation system

Journal
Date Issued
2015
Author(s)
Briz, Susana
•
•
Isgrò, Francesco
•
Cremonini, Roberto
•
Tabone, Ilaria
•
Bertainav, Mario
•
Rodríguez, Irene
•
Fernández-Gómez, Isabel
•
de Castro, Antonio J.
DOI
Abstract
The main telescope of JEM-EUSO will determine Ultra High Energy Cosmic Ray properties by measuring the UV fluorescence light generated in the interaction between the cosmic rays and the atmosphere. Therefore, cloud information is crucial for a proper interpretation of the data. JEM-EUSO will observe the clouds in the field of view of the telescope making use of an atmospheric monitoring system, which consists of a LIDAR and an IR Camera. To retrieve the cloud top height from IR images two different methodologies will be used. The first one is based on stereo vision algorithms and requires two different views of the same scene. The second one is based on the relationship between the cloud top temperature and the cloud top height. From the IR camera the brightness temperature can be retrieved, thus the developed Split Window Algorithm retrieves the real cloud temperature from the brightness temperature in two spectral bands. This article presents a preliminary work, in which both methodologies are compared with the height given by MODIS. The stereo system is provided by the two geostationary satellites MSG-2 and MSG-3. The Split Window Algorithm has been tested in MODIS images of bands 31 and 32. This initial work is a first step to compare a very simplified version of both methodologies.
Coverage
AtmoHEAD 2014: Atmospheric Monitoring for High Energy AstroParticle Detectors
Volume
89
Start page
03004
Conferenece
AtmoHEAD 2014: Atmospheric Monitoring for High Energy AstroParticle Detectors
Conferenece place
Padova, Italy
Conferenece date
May 19–21, 2014
Uri
Url
Issn Identifier
2101-6275
Ads BibCode
2015EPJWC..8903004B
Rights
open.access
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