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Solar altitude frequency tables.

R S McDowell1

  • 1University of California, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

Applied Optics
|February 15, 1983
PubMed
Summary
This summary is machine-generated.

This study presents a comprehensive table detailing annual sunshine hours based on solar altitude and latitude. It includes corrections for atmospheric refraction and total daylight hours, crucial for solar energy and astronomical calculations.

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Area of Science:

  • Astronomy and Astrophysics
  • Atmospheric Science
  • Renewable Energy

Background:

  • Understanding solar radiation patterns is essential for various scientific and engineering applications.
  • Accurate data on sunshine duration is critical for solar energy system design and climate modeling.
  • Previous estimations often lacked detailed, latitude-specific corrections for atmospheric effects.

Purpose of the Study:

  • To provide a detailed table of annual hours with specific solar altitudes.
  • To incorporate corrections for atmospheric refraction into sunshine duration calculations.
  • To present total daylight hours across various latitudes.

Main Methods:

  • Compilation of solar altitude data (h = 0-88 degrees) at 2-degree increments.

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  • Inclusion of latitude data (Equator to North Pole) at 2-degree increments.
  • Application of corrections for atmospheric refraction and calculation of total daylight hours.

    • Main Results:

    • A comprehensive table mapping sunshine hours to solar altitude and latitude.
    • Quantified corrections for atmospheric refraction across different latitudes.
    • Calculated total annual daylight hours for each latitude interval.

    Conclusions:

    • The presented table offers a valuable resource for precise solar energy assessments.
    • Atmospheric refraction significantly influences perceived sunshine duration, especially at lower altitudes.
    • Accurate daylight hour data is vital for optimizing solar technology deployment and climate research.