An angle of declination is relevant when an observer is at a higher altitude than the object being observed. It is the angle made by the line of sight with the horizontal. Suppose this is angle x. Then if the altitude of the observer is known to be h, then line-of-sight distance to the object is h*sin(x). The object is h*tan(x) from the point below the observer at the level of the object.
Conversely, if the line-of-sight distance from the object to the observer or the horizontal distance to the point directly below the observer is known, it is possible to calculate the height of the observer.
solar altitude angle= (90 degree - zenith angle )
If the angle is larger than a right angle it is obtuse
Because in second angle both quaderent comes negative that's why we cant use second angle method
When the angle you are measuring is obviously an obtuse angle (angle above 90 degrees, or when you draw a box in the angle and it turns out bigger than it's supposed to) you use the big numbers. When the angle is obviously acute (opposite definition of obtuse), you use the little numbers.
An acute angle is smaller than a right angle.An obtuse angle is larger than a right angle.^_^
angle of magnetic declination
Magnetic Declination
Magnet declination is the angle between magnetic north and true north. Declination is considered positive east of truth north and negative when west.
solar altitude angle= (90 degree - zenith angle )
Angle declination in surveying refers to the difference between the true north and the magnetic north at a specific location. It is important to account for this declination when using compasses or other magnetic instruments to ensure accurate measurements and calculations.
Because if you need to use your compass to figure out which direction is north,then you need to know by how much the direction the compass points is wrong,and which way. That's the magnetic declination.
when you are close to the magnetic north pole, the declination will be so variable and unpredicatable that a magnetic compass becomes all but useless. You also need to consider the effect of local magnetic anomalies and polar wandering. felicity knows whats up<3
The optimum angle of declination varies depending on the location and purpose. In general, it is recommended to set the declination angle to match the latitude of the location for best performance in terms of solar energy collection. However, for specific applications such as maximizing solar panel efficiency, a more precise calculation based on the sun's position throughout the year may be necessary.
The angle between the geographic and magnetic poles extends more towards the east, as you move to the north. The magnetic pole is actually near Greenland.
The angle between the direction your compass points and the direction you're facing is the 'magnetic azimuth'. The angle between the direction to the north pole and the direction you're facing is the 'true azimuth'. They are virtually never the same angle. The difference between them is the 'magnetic declination' or the 'compass declination' in the place where you are at in which.
To find the variation from true north, you can use a magnetic compass to determine the magnetic north and then calculate the angle between the magnetic north and the true north. This angle is known as the magnetic declination or variation. Many maps and GPS devices provide information about the current magnetic declination in a specific location.
Declination Diagram