SUSIM/UARS observations of the 120 to 300 nm flux variations during the maximum of the solar cycle: Inferences for the 11-year cycle

Journal Article · Fri Nov 20 04:00:00 EST 1992 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/92GL02656· OSTI ID:6832408

Lean, J; VanHoosier, M; Brueckner, G; Prinz, D ^[1]; Floyd, L; Edlow, K ^[2]

---

1. Naval Research Lab., Washington, DC (United States)
2. Interferometrics Inc., Vienna (Austria)

Since October 1991, the Solar Ultraviolet Spectral Irradiance Monitor (SUSIM) on board the Upper Atmosphere Research Satellite (UARS) has been measuring the solar spectral irradiance from 120 to 400 nm with low (5 nm) and moderate (1.1 nm) resolution on a daily basis. By scaling the modulation measured over four solar rotations to proxy indicators of solar activity, the authors estimate the amplitude of the solar ultraviolet irradiance variation during the 11-year activity cycle, extending the wavelength coverage of existing empirical variability models to 120 nm and distinguishing the variability of the emission lines from that of the underlying solar continuum. These estimates are compared with results from another empirical variability model and from direct measurements. 14 refs., 4 figs.

• OSTI ID: 6832408
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 19:22; ISSN GPRLAJ; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
CORRELATIONS
DIRECT SOLAR RADIATION
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
EMISSION
INDICATORS
MODULATION
OZONE
RADIATIONS
RESOLUTION
SCALING
SOLAR ACTIVITY
SOLAR CYCLE
SOLAR FLUX
SOLAR PARTICLES
SOLAR RADIATION
STELLAR RADIATION
TIME DEPENDENCE
ULTRAVIOLET RADIATION
VARIATIONS