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Instrument: SXM : Solar X-Ray Monitor
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Associated Platforms
GOES-8
GOES-7
GOES-6
GOES-5
GOES-4
GOES-3
GOES-2
GOES-1
SMS-2
SMS-1

Related Data Sets
View all records related to this instrument


Description
+ SXM on GOES 1-3 and SMS 1-2

[Source: National Space Science Data Center (NSSDC), http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1975-100A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1974-033A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1975-011A-02 ]

The X-ray counter was composed of a collimator, two ionization chambers, and two electrometers. A small angular aperture was chosen for the telescope collimator, which was mounted so that the declination of its axis could be controlled by ground command to ensure that the full disk of the sun was viewed by the telescope once during every vehicle rotation. One ion chamber was filled with argon at 1 atm for detection of 1- to 8-A X rays and had a 0.127-mm beryllium window to exclude X rays of longer wavelengths. The other chamber was filled with xenon at 1.5 to 2 atm and had a 1.27-mm beryllium window for measurements of X rays in the wavelength range 0.5 to 3 A.

+ SXM on GOES 4

[Source: National Space Science Data Center (NSSDC), http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1980-074A-03 ]

The X-ray monitor consisted of ion chamber detectors. The wavelength ranges and minimum useful threshold sensitivity were 0.5 to 3 A, 1.0E-13 J per sq cm per s; and 1 to 8 A, 1.0E-12 J per sq cm per s; with a dynamic range of 1.0E4.

+ SXM on GOES 5

[Source: National Space Science Data Center (NSSDC), http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1981-049A-03 ]

The X-ray monitor consisted of two ion chambers, mounted behind a slim rectangular field-of-view (48 deg x 3 deg) collimator made of lead-lined aluminum. The chamber for the lower wavelength band of 5 to 30 nanometer was filled with Xe-He mixture with an entry aperture made of 20 mil Be sheet. For the other band, 10-80 nm, the gas was Ar-He mixture and the aperture was a 2 mil Be. The threshold sensitivities were 1.0E-13 J per sq cm per s for the lower wavelength band, and 1.0E-12 J per sq cm per s for the higher band; each had a dynamic range of four decades.

+ SXM on GOES-6

[Source: National Space Science Data Center (NSSDC), http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1983-041A-03 ]

The X-ray monitor consisted of two ion chambers, mounted behind a slim rectangular field-of-view (48 deg x 3 deg) collimator made of lead-lined aluminum. The chamber for the lower wavelength band of 5 to 30 nanometer was filled with Xe-He mixture with an entry aperture made of 20 mil Be sheet. For the other band, 10-80 nm, the gas was Ar-He mixture and the aperture was a 2 mil Be. The threshold sensitivities were 1.0E-13 J per sq cm per s for the lower wavelength band, and 1.0E-12 J per sq cm per s for the higher band; each had a dynamic range of four decades. No usable data could be obtained from August, 94.

+ SXM on GOES-7

[Source: National Space Science Data Center (NSSDC), http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1987-022A-03 ]

The X-ray monitor consisted of two ion chambers, mounted behind a slim rectangular field-of-view (48 deg x 3 deg) collimator made of lead-lined aluminum. The chamber for the lower wavelength band of 5 to 30 nanometer was filled with Xe-He mixture with an entry aperture made of 20 mil Be sheet. For the other band, 10-80 nm, the gas was Ar-He mixture and the aperture was a 2 mil Be. The threshold sensitivities were 1.0E-13 J per sq cm per s for the lower wavelength band, and 1.0E-12 J per sq cm per s for the higher band; each had a dynamic range of four decades.

+ SXM on GOES-8

[Source: National Space Science Data Center (NSSDC), http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1994-022A-03 ]

The X-ray monitor consisted of two ion chambers, mounted behind a slim rectangular field-of-view (48 deg x 3 deg) collimator made of lead-lined aluminum. The chamber for the lower wavelength band of 0.05 to 0.40 nanometer was filled with Xe-He mixture with an entry aperture made of 20 mil Be sheet. For the other band, 0.1-0.8 nm, the gas was Ar-He mixture and the aperture was a 2 mil Be. The threshold sensitivities were 1.0E-12 J per sq cm per s for the lower wavelength band, and 1.0E-11 J per sq cm per s for the higher band; each had a dynamic range of four decades. Entry of charged particle were prevented by the strong magnetic field located at the chamber windows.

Online Resources
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1974-033A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1975-011A-02
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1975-100A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1977-048A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1978-062A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1980-074A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1981-049A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1983-041A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1987-022A-03
http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1994-022A-03

Instrument Logistics
Instrument Owner: USA/NOAA
USA/NASA