首页 | 本学科首页   官方微博 | 高级检索  
     


Derivation of density and temperature from the Cassini–Huygens CAPS electron spectrometer
Authors:G.R. Lewis, N. Andr  , C.S. Arridge, A.J. Coates, L.K. Gilbert, D.R. Linder,A.M. Rymer
Affiliation:

aMullard Space Science Laboratory, University College London, UK

bResearch and Science Support Department, European Space Agency, Noordwijk, The Netherlands

cApplied Physics Laboratory, Johns Hopkins University, Laurel, MD, USA

Abstract:In this paper we present two methods to derive electron fluid parameters from the CAPS–ELS spectrometer on board the Cassini spacecraft currently in orbit around Saturn. In the first part of the paper we give a basic overview of the instrument and describe the challenges inherent in the derivation of density and temperature values using these techniques. We then describe a method to calculate electron moments by integrating the particle distribution function. We also describe a second technique in which we fit the electron energy spectrum with a Gaussian curve and use the peak energy of this curve to derive density and temperature values. We then compare the two methods with particular emphasis on their application to Cassini SOI observations in the saturnian environment and point out the limitations of the two techniques. We will show that results from the two very different methods are in agreement when the physical properties of the environment and of the observed electron populations have been inferred from inspection of the raw data. Finally we will suggest future developments that will remove these limitations.
Keywords:Electron   Density   Temperature   Cassini   Saturn
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号