Surveying
The distance between the minor control point and the principal point should be equal to

Sum of the base lines of stereo pair
Base line of the left photograph of stereo pair
Base line of the right photograph of stereo pair
Mean of the base lines of the stereo pair

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Surveying
Sidereal day

Is divided into the conventional hours, minutes and seconds
Is the period of time taken by the earth in making a complete rotation with reference to stars
All listed here
Is slightly shorter than an ordinary solar day

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