Calculating solar noon angle
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The sun is at its highest point at Solar Noon. ... Fill in the table below for altitude of the sun at noon for each month (suns angle above horizon, found in the top right hand corner of the animation), sun-rise and sunset times (bottom right hand box of animation), the length of day between sunrise and sunset, and If you need help calculating ...
[DOCX File]Energy Design Tools
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The angle that the sun’s rays make with a line perpendicular to a surface. The angle of incidence determines the percentage of direct solar radiation interepted by the surface. If the sun’s rays are perpendicular to a surface, they are said to be “normal” to that surface and so the angle of incidence would be zero.
[DOC File]Article
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From Fig. 7, there is an optimal tilt angle which makes solar radiation measured maximum. At 09.10 and 09.40 in the morning, the solar radiation received on the East surface was maximum when the tilt angle was 40o. At 11.20 in the noon, the optimal tilt angle was 0o (means horizontal) or 10o in the North.
[DOC File]Calculate the direct solar radiation per grid cell for the ...
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Two adjustments, used in calculating the solar altitude, are a function of the latitude of your site and the solar angle with respect to the equator, which is called solar declination and changes with time of year. ... of the sun’s rays at solar noon for that day, and the thickness of the atmosphere . in the vertical direction, such that:
[DOC File]Solar - Baylor ECS
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Hour Angle of the Sun The Solar Hour Angle of the Sun for any local location on the Earth is zero° when the sun is straight overhead, at the zenith, and negative before local solar noon and positive after solar noon. In one 24-hour period, the Solar Hour Angle changes by 360 degrees (i.e. one revolution).
[DOC File]Focus on Science A1
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The angle measured from the horizon to the point directly overhead (the zenith) is 90(. The angle subtended by the moon (i.e., the Moon's angular diameter) is about 1/2 ( (1/2 degree) (as seen from the Earth). The smallest angle that your eye can resolve is about 2' (2 arcminutes). Anything smaller than this is perceived as a single point.
[DOC File]When A Ruler Is Too Short
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At local noon on the selected date, measure the length of the shadow of the gnomon. Now the calculations begin. The length of the shadow (indicated with s in Figure 1) and the height of the gnomon (h in Fig. 1) form two sides of a right triangle. The angle at the top, ψ (psi), between the hypotenuse and the gnomon, is the one of interest (Fig. 1).
[DOC File]Homework A1
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Homework A1.3: Calculating the Angle Subtended by your Fist. One of the common approximations in observational astronomy is to use your fist, held at arm’s length, to estimate angular distances on the sky. The common belief is that everyone’s fist, held at their arm’s length, subtends an angle of roughly 10(.
[DOC File]NASS Scientific Calculator Programs:
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For daylight savings time (spring forward) add one hour to the clock. Solar noon in Chicago in the summer is therefore typically at 12:50:31 CDST. All the calculations in these programs use the time angle . t, the time in degrees from solar noon. You can calculate the lines on any sundial to include the longitude correction.
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This angle is 0º at solar noon. It is probably close to -90º at sunrise and 90º at sunset, depending on the season. This angle is only measured in the horizontal plane; in other words, it neglects the height of the sun.
[DOC File]Abstract: The GEOPACK library includes 19 FORTRAN ...
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(c) if the solar wind velocity components VGSEX, VGSEY, VGSEZ have changed. 2. A general implicit assumption here is that the position of the noon meridian plane in the . SM system is defined by the observed direction of the incoming solar wind flow, rather . than by the Earth-Sun line. To convert vectors to/from the standard SM system, set in
[DOC File]The Sun is at its lowest path in the sky on the Winter ...
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The hour angle for each given hour line is 15 degrees multiplied by how many lines away from the noon line you are plus the longitude correction in hour-fraction. (For instance, 2 o'clock is two lines away from the noon line, so the hour angle for 2 o'clock is (2 hrs + long. correction)x 15 degrees.)
[DOC File]Chapter 1
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Therefore, in one solar day, the Earth will make 365/360 = 1.039 rotations = an extra 5(/solar day. Our planet takes 365 days to orbit the Sun, so the additional angle is 360°/365 = 0.986°. Because Earth takes about 3.9 minutes to rotate through this angle, the solar day is 3.9 minutes longer than the sidereal day (that is, one sidereal day ...
[DOC File]Midterm Review Questions
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20. How can you use Polaris to find your latitude? Latitude equals the angle of Polaris above the horizon. 21. What is Solar Noon? Where is the sun at Solar Noon? When the sun is at its highest point in the sky at a given location. 22. What is Greenwich Mean Time (GMT)? The time at the prime meridian in Greenwich, England. 23.
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Step 2: Calculate H, the hour angle. On September 15th, 2007, solar noon occurred at 1:24 pm [7]. Using equation [3-3], the hour angle can be calculated. The table to the on the previous page shows the values of the hour angle, in degrees, for each hour of the 24-hour clock for September 15th, 2007.
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