(6marks) 2.Write short notes on; a.Synoptic,climatological,agricultural and aviation meteorological stations. The Toshiba DVD/VCR player and recorder will work with your Tivo, but only in analog. A. González, J. Calbó, A. Sanchez-Lorenzo, Using digital image processing to characterize the Campbell–Stokes sunshine recorder and to derive high-temporal resolution direct solar irradiance, Atmospheric Measurement Techniques, 10.5194/amt-8-183-2015, 8, 1, (183-194), (2015). Sun's rays are refracted and focused sharply on the record card beneath the glass sphere, leaving burnt marks on the card. SUNSHINE RECORDER WORKING PRINCIPLE: Sunshine recorder essentially consists of a glass sphere mounted in a spherical bowl and a metallic groove which holds a record card. In this device a glass sphere concentrates sunlight onto a card and the amount of scorching on the card records the amount of sunlight that had fallen on it. Corresponding Author. Most widely used for wind-speed measurements is the revolving-cup electric anemometer, in which the revolving cups drive an electric generator.The output of the generator operates an electric meter that is calibrated in wind speed. How does it work? … (2marks) c.Describe the sitting and orientation of the stevenson screen in a weather station. Fig. Sunshine is recorded with a simple, yet clever device, called a Campbell-Stokes recorder, the design of which goes back to 1879. Solar-cell-type pyranometers. Anemometer, device for measuring the speed of airflow in the atmosphere, in wind tunnels, and in other gas-flow applications. You take a laser beam and split it in half using a semi-silvered mirror (a mirror partly coated with silver so it allows half the light to pass through and reflects the rest away). Working principle: The basic principle is called interferometry, and it can be used to measure all kinds of different things with incredible precision. a sunshine recorder is used to record the duration of sunshine at a place for a day. New insights into the history of the Campbell‐Stokes sunshine recorder. A. Sanchez‐Lorenzo. Department of Physics, University of Girona, Spain. (8marks) b.The working principle of a radar system. Photo: You can use small photovoltaic solar cells like these to measure solar radiation.. Not all pyranometers use thermopiles. You can also get less sophisticated (and considerably cheaper) solar-cell pyranometers, based on light-sensitive semiconductor chips, that give more approximate measurements.The best thermopile pyranometers are designed to respond … 1.a.State the main features of a stevenson screen. We can record the duration of sunshine hour from the paper chart by using measuring the … A sunshine recorder is a device that measures how much sunlight a certain region or area is receiving at any given time. Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland. Working principle This recorder consists essentially of a glass sphere of 96 mm diameter mounted concentrially in a section of a spherical metal bowl, the diameter of which is such that the sun`s tays are focussed sharply on a card held in the grooves, in the bowl. Image Credit Flickr User LaurentKB The Campbell–Stokes Recorder comes in a variety of sizes, some quite large, but is … Sunshine Recorder . But, in absence of sunlight the paper chart become intact. A. Sanchez-Romero, J. Working Principle: When sunshine present, the paper chart is burned by heat passing through the lens. (2marks) b.Clearly describe the function of the stevenson screen in a weather station. 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