2/21/2024 0 Comments Zip code look up directv satellite![]() This is the standard method used by the Department of Defense United States, the Ministry of Defence of Britain, NATO and the Word Hydrographic Office in determining the magnetic declination. This utility uses Google Maps API, World Magnetic Model 2010-2015 and a mathematical model to determine the magnetic declination of a place, in other words, the difference between true north and magnetic north. The calculation of the magnetic declination is based on the work "The US/UK World Magnetic Model for 2010-2015" published by the National Geophysical Data Center and British Geological Survey Geomagnetism Group. When declination is West or negative, you must add the declination value to the calculated true azimuth. When using Magnetic Declination values, keep in mind that when the declination is East or positive, you must subtract the declination value from the calculated true azimuth. Magnetic Declination is the angle between the magnetic and geographical meridians at any place, expressed in degrees east or west to indicate the direction of magnetic north from true north. ![]() In high elevation cases watch out for the possibility of rain water collecting in the dish. Sites near the equator may require you to point to almost 90 deg elevation angle when the longitude of the satellite is similar to the longitude of the site location. When your dish is pointed almost straight up the elevation angle is nearly 90 degrees. This causes increases and decreases in the signal level every several seconds for many hours, like the twinkling of a star. ![]() Scintillation also occurs, particularly in hot humid weather. At low elevation angles, below 5 deg at C band and 10 deg at Ku band, the path through the atmosphere is longer and the signals are degraded by rain attenuation and rain thermal noise. When your dish is pointed low down near the horizon the elevation angle is only a few degrees. If it were tilted to a point directly overhead, the satellite antenna would have an elevation of 90 degrees. When aimed at the horizon, the elevation angle is zero. The upward tilt to a satellite antenna measured in degrees required to aim the antenna at the communications satellite. Note that you find a satellite by pre-setting the elevation accurately and then swinging the whole antenna boldly in azimuth till the signal locks up - so an approximate azimuth angle is normally sufficient. It is defined with respect to due north as a matter of easy convenience.īy definition North is 0 deg, East is 90 deg, South is 180 deg and west is 270 deg. The azimuth angle for any particular satellite can be determined for any point on the surface of the earth giver the latitude and longitude of that point. The angle of rotation (horizontal) that a ground based parabolic antenna must be rotated through to point to a specific satellite in a geosynchronous orbit. ![]() The observer is usually located on the earth's surface. Zoom in for better accuracy.Ĭlick image to access Dish Alignment CalculatorĪzimuth and elevation are angles used to define the apparent position of an satellite in the orbit, relative to a specific observation point. Drag and drop the marker to pinpoint the place. You can improve the accuracy of the results on your site by putting the mark on your home area. You can calculate at once the azimuth, azimuth magnetic, elevation and LNB skew from your city. TrackingSat detects the city where you are and shows latitude, longitude and magnetic declination of the dish site. It is the most practical and compact than competitors and you do not need a fast internet connection to use it. Dish Alignment Calculator using Google Maps
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