The PMTRAS Roll Aspect System on RHESSI

Details The PMTRAS Roll Aspect System on RHESSI The PMTRAS Roll Aspect System on RHESSI

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002soph..210..101h&link_type=abstract

Solar Physics, v. 210, Issue 1, p. 101-113 (2002).

Physics

24

Scientific paper

High-resolution solar hard X-ray imaging on the Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) spacecraft is achieved by a set of rotating modulation collimators. The interpretation of the observed time-modulated X-ray flux in terms of high-resolution, accurately located images requires continuous, arc-minute roll aspect, which at present is provided by the `Photo-Multiplier Tube Roll Aspect System' (PMTRAS). This paper describes the PMTRAS operating principles, hardware implementation, calibration, performance and data analysis approach, with emphasis on its effect on RHESSI imaging.

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