You observe the lower limb of the Sun at a sextant altitude (hs) of 38°07.5' on 8 August. The index error is 5.2' off the arc. The height of eye is 72 feet (22 meters). What is the observed altitude (Ho)?

Question

You observe the lower limb of the Sun at a sextant altitude (hs) of 38&deg;07.5' on 8 August. The index error is 5.2' off the arc. The height of eye is 72 feet (22 meters). What is the observed altitude (Ho)?

Accepted Answer

Option C: 38&deg;19.2'. Apply corrections to the sextant altitude (hs) in sequence: Index Error (off the arc is additive), Dip (based on height of eye), and the combined Altitude Correction (refraction and parallax). For 38°07.5' hs, applying +5.2' IE, -8.4' Dip, and +14.9' total correction results in an observed altitude (Ho) of 38°19.2'.

You observe the lower limb of the Sun at a sextant altitude (hs) of 38&deg;07.5' on 8 August. The index error is 5.2' off the arc. The height of eye is 72 feet (22 meters). What is the observed altitude (Ho)?

You observe the lower limb of the Sun at a sextant altitude (hs) of 38°07.5' on 8 August. The index error is 5.2' off the arc. The height of eye is 72 feet (22 meters). What is the observed altitude (Ho)?