Stray-light analysis of Amon-Ra instrument

Hanshin Lee, Sug Whan Kim, Tony Richards, Ian Tosh, Nigel Morris, Mike Lockwood

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


The Amon-Ra instrument is the main optical payload of the EARTHSHINE satellite and a unique Earth reflectance monitor. It consists of two separate optical systems, one imaging photon fluxes over the visible waveband and the other bolometrically measuring global emissions while the satellite orbits about the L1-Lagrange point. Two optical systems were designed to share the same apertures to the Sun and Earth and view the same target along the same direction as the spacecraft rotates. This design approach is advantageous in minimising the optics alignment problem as well as the differential degradation of front-end optics and detectors between the two systems. Nevertheless, such an approach makes it difficult to control stray-light separately in each system and the signal of one source may be corrupted due to the other. In this paper, we discuss the stray-light performance of the Amon-Ra instrument and report the analysis results.

Original languageEnglish
Article number586706
Pages (from-to)1-12
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2005
EventOptical Modeling and Performance Predictions II - San Diego, CA, United States
Duration: 2005 Aug 32005 Aug 4

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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