Additionally, the GV reacheda maximum true altitude of 55, 256 feet ( 22.1km ), shattering the existingmaximum altitude record held by the Soviet transport AN-72 by a margin of37 per cent.
12.
A simple approximation is to consider that a mountain's apparent altitude at your eye ( in degrees ) will exceed its true altitude by its distance in kilometers divided by 1500.
13.
The altitude obtained is corrected for dip ( the error caused by the observers height above the sea ) and refraction to obtain the true altitude of the object above the horizon.
14.
On the horizon refraction is slightly greater than the apparent diameter of the Sun, so when the bottom of the sun's disc appears to touch the horizon, the sun's true altitude is negative.
15.
Additionally, the GV reacheda maximum true altitude of 55, 256 feet ( 22 . 1km ), shattering the existingmaximum altitude record held by the Soviet transport AN-72 by a margin of37 per cent.
16.
The actual declination and hour angle of the celestial body are found from astronomical tables for the time of the measurement and together with the'True Altitude'are put into a formula with the assumed latitude.
17.
In case of recession of water level of Caspian Sea down to true altitude of-29 m depths of the lower Volga would decrease and it would be very difficult to maintain ship movement via this part of Volga-Don Waterway in the dimension planned.
18.
So when the control tower tells you to fly at ( say ) 10, 000 feet-he doesn't know what the air pressure is like where you are-and it's understood that you won't be flying at a TRUE altitude of 10, 000 feet-but at whatever altitude a barometric altimeter would read.
19.
A sight is taken, that is the distance above the horizon of a heavenly object, in this case nearly always the sun, is measured with a sextant and the exact time noted in UTC . The sextant angle obtained is corrected for dip ( the error caused by the observers height above the sea ) and refraction to obtain the true altitude of the object above the horizon.
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