Concepedia

A. Johannesson

AJ

Statistics

Publications

8

Citations

411

H-Index

8

Active since

1991

Affiliations

California Institute of Technology(Current)

New Jersey Institute of Technology

United States Naval Research Laboratory

A. Johannesson is an author at California Institute of Technology specializing in astrophysics, solar variability, and engineering.

Top concepts

AstrophysicsEngineeringSolar VariabilityCosmic RaySolar PowerSpace WeatherSolar ActivitySolar ConvectionAtmospheric ScienceRadiation Measurement

Publications per year

1991–1999

8

Publications

8

Synoptic Hα Full-Disk Observations of the Sun from Big Bear Solar Observatory – I. Instrumentation, Image Processing, Data Products, and First Results

C. Denker, A. Johannesson, W. Marquette et al. · Solar Physics · 1999 · 116 citations · Full text

Magnetic Sources of the Solar Irradiance Cycle

J. Lean, J. W. Cook, W. Marquette et al. · The Astrophysical Journal · 1998 · 105 citations · Full text

Solar Physics (Heliophysics), Solar Variability, Engineering +13

High-resolution spectra of solar magnetic features. II - Magnetic fields of umbral brightenings

B. W. Lites, Thomas A. Bida, A. Johannesson et al. · The Astrophysical Journal · 1991 · 78 citations

Modeling solar extreme ultraviolet irradiance variability using emission measure distributions

Harry P. Warren, J. T. Mariska, J. Lean et al. · Geophysical Research Letters · 1996 · 26 citations

Upper Atmosphere, Ultraviolet Light, Engineering +17

The Pole‐Equator Variation of Solar Chromospheric Height

A. Johannesson, H. Zirin · The Astrophysical Journal · 1996 · 24 citations · Full text

Geophysics, Upper Atmosphere, Solar Variability +13

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