Sounding rocket measurement of the absolute solar EUV flux utilizing a silicon photodiode

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA095iA04p04291· OSTI ID:5258263

Ogawa, H S; McMullin, D; Judge, D L ^[1]; Canfield, L R ^[2]

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1. Univ. of Southern California, Los Angeles (United States)
2. National Inst. of Standards and Tech., Gaithersburg, MD (United States)

A newly developed stable and high quantum efficiency silicon photodiode was used to obtain an accurate measurement of the integrated absolute magnitude of the solar extreme ultraviolet photon flux in the spectral region between 50 and 800 {angstrom}. The detector was flown aboard a solar point sounding rocket launched from White Sands Missile Range in New Mexico on October 24, 1988. The adjusted daily 10.7-cm solar radio flux and sunspot number were 168.4 and 121, respectively. The unattenuated absolute value of the solar EUV flux at 1 AU in the specified wavelength region was 6.81 {times} 10{sup 10} photons cm{sup {minus}2} s{sup {minus}1}. Based on a nominal probable error of 7% for National Institute of Standards and Technology detector efficiency measurements in the 50- to 500-{angstrom} region (5% on longer wavelength measurements between 500 and 1216 {angstrom}), and based on experimental errors associated with their rocket instrumentation and analysis, a conservative total error estimate of {approximately}14% is assigned to the absolute integral solar flux obtained.

• OSTI ID: 5258263
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 95:A4; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
COMETS
EFFICIENCY
ELECTROMAGNETIC RADIATION
EXTREME ULTRAVIOLET RADIATION
HEATING
INTERPLANETARY SPACE
IONIZATION
MEASURING INSTRUMENTS
MEASURING METHODS
PHOTODIODES
PLANETARY ATMOSPHERES
RADIATION DETECTORS
RADIATIONS
ROCKETS
SATELLITE ATMOSPHERES
SCATTERING
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SOLAR FLUX
SPACE
ULTRAVIOLET RADIATION