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标题：Intercalibration of GOES 8–15 solar proton detectors
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作者：J. V. Rodriguez ; J. C. Krosschell ; J. C. Green 等
期刊名称：Space Weather
印刷版ISSN：1542-7390
出版年度：2014
卷号：12
期号：1
页码：92-109
DOI：10.1002/2013SW000996
语种：English
出版社：American Geophysical Union
摘要：This work provides a relative intercalibration of the high-energy proton channels from the Energetic Particle Sensors (EPS) flown on the Geostationary Operational Environmental Satellites (GOES) since 1994 using a technique that depends on features that arise during high solar wind dynamic pressure. Based on observations of solar energetic protons from polar-orbiting and geostationary satellites (1998–2013), solar proton fluxes are isotropic at geostationary orbit during periods of high solar wind dynamic pressure (Pdyn>5−10 nPa). The observed isotropy results from the solar proton fluxes having rigidities (momenta per unit charge) greater than their geomagnetic cutoffs over the complete energy and angular responses of the satellite-borne detector. (The cutoff in a given direction is the rigidity below which an interplanetary particle cannot reach that location.) Under these conditions, we determine the relative responses of the EPS flown on GOES 8 through 15. These detectors are widely used for alerts of the radiation hazard posed to spacecraft and humans by solar energetic particle events; therefore, it is important to know their relative responses. The results of this low-scatter intercalibration analysis show that the relative responses agree to 20% or better (sometimes better than 1%). The effect of such relative calibration differences on the derived integral fluxes used by NOAA for its real-time solar radiation storm alerts is shown to be small (<10%). This method can be used to intercalibrate solar proton detectors of different design if their broad energy response functions are carefully accounted for.