Get Zenith Distance/vertical Angle Da Form 5817, Jul 2001 - Armypubs Army

0:33 2:13 I have a Zenith which is directly above. And nadir which is directly towards the center of the massMoreI have a Zenith which is directly above. And nadir which is directly towards the center of the mass or center of the gravity. Now the vertical angle is measured from The Horizon.

To convert from a vertical angle to zenith requires knowing which side of the zenith circle is involved. Traditionally, the 0°-90°-180° side of the circle is an instrument's direct position while the 180°-270°-0° side is the reverse position, Figure F-6 (more on that in the later angle measurement topics).

Vertical angles are across from each other on any two intersecting lines and are always congruent. If you draw a line across the C, it sort of looks like a 9, so it is two angles adding to be 90, If you draw a line across the S, it sort of looks like an 8 to remind us that it is two angles adding up to 180.

Zenith distance = 90o - vertical angle a. Given vertical angle = 20o10' = (20 + 10/60) degrees (since 1' = 1/60o) zenith distance = 90o - (20 + 10/60)o = 89 + 60/60 -20 - 10/60 …

Vertical Angle Also known as the Zenith angle, it is the angle measured from directly above (the zenith) – so perfectly horizontal will have a vertical angle of 90°. If you are looking to somewhere higher, the vertical angle will be less than 90°, while looking further down will be greater than 90°.