0
You need to determine the geographic north, for example by observing sunrise and sunset; by observing the stars; or by using a compass that reacts to Earth's rotation (a gyrocompass).
Then you observe where the needle of a magnetic compass points.
Finally, you measure the angular difference between the two.
Still curious? Ask our experts.
Chat with our AI personalities
Judy
Maxine
FranAdd your answer:
Earn +20 pts
How is magnetic declination measured in the northern hemisphere?
It is measured exactly the same in the Southern hemisphere (no difference between the two hemispheres). It is the difference between magnetic north and true north and it varies all over the globe. Magnetic declination (also called magnetic variation) is positive when magnetic north is east of true north (clockwise) and it is negative when magnetic north is west of true north (anti-clockwise).
How is the altitude angle and zenith angle related to latitude and declination?
solar altitude angle= (90 degree - zenith angle )
Altitude is the angle measured above the?
Altitude is the angle measured above the horizon.
What is an agonic point?
An agonic point is o location where a magnetic needle points North without declination.
What is an agonic line?
An agonic line is a line on a chart or map showing points of zero magnetic declination.
