Solar altitude

Solar altitude

In solar analysis, the vertical angular distance of a point in the sky above the horizon. Altitude is measured positively from the horizon to the zenith, from 0 to 90 degrees.
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As the solar altitude angle decreases, the more amount of solar radiation penetrates into the room.
Solar irradiance was expected to be the biggest because the solar altitude is the highest during the summer period.
Suppose that [eta] denotes the solar altitude angle and [psi] denotes the solar azimuth angle, then we have the solar direction vector
The clear-sky global and beam luminous efficacy models mainly depend on solar radiation and solar altitude angle [4-6].
Malaysia has lowest solar altitude angles (VSA) for east orientation in the morning hours.
The unit features an uninterruptable power supply and sensors for air temperature, relative humidity, diffuse radiation, total global plane of array irradiation, total global horizontal irradiation, solar altitude and azimuth angle, precipitation, and back of module temperature.
The difference between the solar altitude angle in summer and winter was more than twice (83.5 and 40.3 respectively) (Table 3 and Fig.
The tracking error of Fresnel reflectors could be affected by time, mirror exocentric structure, collector orientation, height of absorbers, axis position, solar altitude angle, and so on.
Identified Solar Altitude Angles (SAA) for Lahore: The SAA for 32oN latitude, are calculated and the value for important dates are reproduced in Table 2.0.
Differences in the attenuation coefficients of snow in the same month can be attributed to differences in cloud cover, solar altitude and liquid water content.
For calculations of solar energy flux at a horizontal plane, it is convenient to change the Zenith angle [[theta].sub.Z] to solar altitude (elevation) angle [beta] (Fig.