Quick positioning of satellite antenna installation, Satellite Antenna Installation
Keywords: antenna installation
Author: Zhang Peijun
1. Satellite antenna
We know that the sync satellite is over the equator of the earth (the latitude is 0), which is about 36,000 kilometers from the earth. It is still still stopping relative to the earth (in fact it and the speed of the earth, the speed of the first universe is 7.9. -11.2 km / sec rotation around the earth), so it is also called the earth synchronous satellite. Satellite slender means that the satellite is projected on the earth, that is, the satellite is a place in the Earth equatorial and satellite intersecting points in an empty place for about 36,000 kilometers.
my country's country is in the north of the Earth, which is the north hemisphere, so synchronous satellite is always in my country's south direction, that is, the direction of the ground satellite antenna should be directed to the south. Generally, when installing the satellite antenna, first determine the correct position of the southern place, the easiest way is that we can use the time at 12 o'clock, put a fine bamboo rod vertically on the ground on the ground, the sun The projection office is a southern direction. At the positive point of the sun when I arrived at 12:00 at noon, I directly took the bamboo rod of the projection to the tightening, and the billet was drawn on the ground, then the straight line refers to the local installation antenna. Towards. Of course, due to the time zone latitude and longitude of the earth, it is divided by 360 ° 24, so the accuracy of each time zone should be 15 °, which means every 4 minutes, it is poientic.
2. Satellite antenna east, Western direction
The earth is divided into 360 parts along the latitude and latitude, each of which is 1 °, 0 ° warp and 1800 ° main line just divides the earth, and my country is in the east half, so the longitude should be distributed in the West, East (N) 0 ° One East is 180 °, the larger the east of the east, and the less west of the west side.
Before the implementation of the installation antenna, we must first know the longitude of the satellite, followed by the geographic heel of your location. If the satellite slender is equal to the location of the place, the satellite receiving antenna should be in the direction of the south. If the satellite slender is greater than the longitude of the location, the satellite receiving antenna should face the direction of the southern part, if the satellite slender is less than the location, at this time The receiving antenna should face the opposite direction. If there is approximately 120 ° e from Hangzhou, Zhejiang Province is a south, if it receives 100.5 ° e Central Dan No. 1 satellite, then the azimuth of its antenna should be moved by Zhengan to West, but should receive Pan American No. 2 (169 ° e) Satellite should move from Zhengnan to east. Then, when the satellite is a SMS (92.2 ° e) signal, since 92.2 ° is less than the landlite L200, the antenna should be moved from the south to the opposite direction, and when the signal of Zhongxing 68115.5 ° E is received, because 115.5 ° E satellite is less than 120 ° in Hangzhou, so the pot of the satellite receives the antenna should be in the direction of the south.
3. Satellite antenna elevation angle positioning
After a preliminary understanding of the longitude of the satellites and the long run, further estimating the elevation of the antenna is relatively easy and convenient. If the longitude of the satellite is equal to the longitude of receiving the location of the location, then the elevation of the satellite antenna should be the maximum. Conversely, if the satellite is more than the difference index, the elevation of the antenna should be smaller, so that the elevation position of the satellite receiving antenna can be generally determined. For example, the satellite that is from 105.5 ° e, the satellite, which is 105.5 ° e, is determined that the antenna should be in the southwest direction, and its elevation is about 400 angles, and when receiving L L5.5 ° E satellite, Its satellite antenna is approximately 55 ° angle, so that after further refinement is further adjusted, it can lock the correct antenna elevation angle.
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