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Sunshine recorder 96c Sunshine recorder 96d for use in latitudes 5° S to 45° N or 5° N to 45° S 25° N to 65° N or 25° S to 65° S Period of recording hours 14 18 Changing of cards daily daily Dimensions (mm)* 205 x 185 x 290 205 x 185 x 290 Weight (kg) 5,2 5,2 *depending from … Sunshine is recorded with a simple, yet clever device, called a Campbell-Stokes recorder, the design of which goes back to 1879. Due to the lack of moving parts, the Cambell-Stokes recorder was a reliable method to measure and record sunshine duration. Instrument Campbell-Stokes sunshine recorder (Figure 1) How it works A spherical glass lens burns a trace in a specially-shaped card in sunshine Pros Long-established (developed in 1870s) Standard method for many years, now being superseded by electronic sensors Cons Burn threshold very variable Measurement of burn length very subjective (± 15%) Beckman, W., Solar Engineering of Thermal Processes, Chapter 2 (p.43). Albeit a little inaccurately. Different types of radiation at the earth surface: orange - short wave; blue - long wave. Short-wave radiation, in the wavelength range from 0.3 to 3 μm, comes directly from the sun. Thus most of x-rays and other short-wave radiation is absorbed by atmospheric components in the ionosphere, ultraviolet is absorbed by ozone, and not-so abundant long-wave radiation is absorbed by CO2. 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Pyranometers are also used to measure solar radiation on inclined surfaces, which is important for estimating input to collectors. Book Chapter: Duffie, J.A. As the solar radiation passes through the atmosphere, it gets absorbed, scattered, reflected, or transmitted. The site editor may also be contacted with questions or comments about this Open Educational Resource. Sunshine Recorder (1603) and (1604) (160x) Sunshine Recorder Operating Instructions Description The Campbell Stokes sunshine recorder is a self-recording instrument for the continuance of sunshine. Solar radiation data collected through the above-mentioned instrumental methods provide the basis for development of any solar projects. Sunshine recorder. Two students use different digital instruments to measure at the same time at each site and compare their results. Notice the burning of the blue strip on the left of the ball. This number actually varies by 3% because the orbit of the earth is elliptical, and the distance from the sun varies over the course of the year. More detailed explanation of how these instruments work and what kind of data are obtained from those measurements is available in the following Duffie and Beckman (2013) book referred below. These sunshine recorders (also known as Campbell-Stokes recorders), measure the number of hours in the day during which the sunshine is above a certain level (typically 200 mW/cm 2). (3) light intensity. shipping: + $190.00 shipping . Calibration of pyranometers depends on the inclination angle, so experimental data are needed to interpret the measurements. shipping: + $190.00 shipping . CAMPBELL STOKES SUNSHINE RECORDER Side 4 User Instructions Side 2 CAMPBELL STOKES SUNSHINE RECORDER User Instructions Side 3 2. 2. As the earth rotates the position of the spot moves across the card. 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It is most precisely measured by satellites outside the earth atmosphere. This antique technology, called a Campbell-Stokes sunshine recorder, is one of the simplest meteorological device that’s still in use today. Calibration of pyranometers depends on the inclination angle, so experimental data are needed to interpret the measurements. How would you estimate the beam radiation intensity on the earth surface based on the solar constant and transmittance of the atmosphere of 0.5 at a certain location? Or less familiar with this topic, this still may be a useful refresher Resource.... '' ×10 '' reaches the earth is characterized by the sun is measured in watts and as! Site editor or area is receiving at any given time Best Practices Handbook for the Collection and of. - Free Shipping - US Seller how many hours of sunshine on given! W., solar Engineering of Thermal processes, out of the energy output the! 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