Physics
Scientific paper
Aug 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spie.7438e...1c&link_type=abstract
Solar Physics and Space Weather Instrumentation III. Edited by Fineschi, Silvano; Fennelly, Judy A. Proceedings of the SPIE, Vol
Physics
Scientific paper
The X-Ray Sensor (XRS) has been making observations of the solar soft X-ray irradiance for over thirty years onboard National Oceanic and Atmospheric Administration's (NOAA) Geostationary Operational Environmental Satellites (GOES). The XRS provides critical information about the solar activity for space weather operations, and the standard X-ray classification of the solar flares is based on its measurements. The GOES-R series of XRSs, with the first in the series to launch in 2014, has a completely new instrument design. The XRS spectral bands remain the same as before by providing the solar X-ray irradiance in the 0.05-0.4 nm and 0.1-0.8 nm bands. The changes include using Si photodiodes instead of ionization cells to improve performance, using multiple channels to allow wider dynamic range, providing quadrant photodiodes for real-time flare location measurements, and providing accurate radiometric calibrations using the National Institute of Standards and Technology (NIST) Synchrotron Ultraviolet Radiation Facility (SURF) in Gaithersburg, Maryland.
Chamberlin Phillip C.
Eparvier Francis G.
Jones Andrew R.
Woods Thomas N.
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