00:01
Hello students, here the 19th question is the definition of look angle.
00:08
So, the look angle is defined as the coordinates to which an earth station, an earth station must be pointed, must be pointed to communicate with the satellite, with the satellite are called look angles.
00:54
The two look angles are angle of elevation, angle of elevation that is el and another one is azimuth angle, azimuth angle that is az.
01:29
So, in this diagram this is the local vertical, this be the position of satellite and this be the path to satellite, path to satellite and this angle is called elevation angle, this is one of the look angle and this angle is called azimuth angle.
02:02
So, here this is the projection of path on local horizontal, projection of path on local horizontal.
02:20
So, these are the two look angles, one is elevation angle and another one is the azimuthal angle.
02:25
And for the next part of the question, for the second part we have to calculate the elevation angle and the azimuthal angle.
02:35
So, el and az we have to find.
02:40
So, given that the site latitude is site latitude that is capital l is equal to 35 degrees and the site longitude, site longitude is equal to that is n is equal to 90 degrees and satellite longitude, satellite longitude that is s is equal to 83 degrees.
03:29
Now, we have to calculate the elevation angle and the azimuth angle.
03:34
So, for calculating the elevation angle, elevation angle is equal to that is el is equal to tan inverse of cos g into cos l minus 1512 divided by square root of 1 minus cos squared g into cos squared l.
04:16
Here g is equal to s minus n...