Main Image
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRI - Cosmic Ray Indirect
A Method for Cloud Mapping in the Field of View of the Infra-Red Camera During the EUSO-SPB1 Flight
A. Bruno, A. Anzalone, C.F. Vigorito*
*corresponding author
Full text: pdf
Pre-published on: 2019 July 22
Published on:
Abstract
EUSO-SPB1 was released on April 24$^{th}$, 2017, from the NASA balloon launch site in Wanaka (New Zealand) and landed on the South Pacific Ocean on May 7$^{th}$. The data collected by the instruments onboard the balloon were analyzed to search UV pulse signatures of UHECR (Ultra High Energy Cosmic Rays) air showers. Indirect measurements of UHECRs can be affected by cloud presence during nighttime, therefore it is crucial to know the meteorological conditions during the observation period of the detector. During the flight, the onboard EUSO-SPB1 UCIRC camera (University of Chicago Infra-Red Camera), acquired images in the field of view of the UV telescope. The available nighttime and daytime images, include information on meteorological conditions of the atmosphere observed in two infra-red bands. The presence of clouds has been investigated employing a method developed to provide a dense cloudiness map for each available infra-red image. The final masks are intended to give pixel cloudiness information at the IRcamera pixel resolution that is nearly 4-times higher than the one of the UV-camera. In this work
cloudiness maps are obtained by using an expert system based on the analysis of different low level image features. Furthermore, an image enhancement step was needed to be applied as a preprocessing step to deal with uncalibrated data.
Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.