单项选择题
In the navigational triangle，the angle at the elevated pole is the（）.
A.meridian angle
B.altitude
C.right ascension
D.azimuth angle
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相关考题
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单项选择题
In the horizon system of coordinates what is equivalent to latitude on the Earth?（）.
A.Altitude
B.Zenith
C.Declination
D.Zenith distance -
单项选择题
In the horizon system of coordinates what is equivalent to the equator on the Earth?（）.
A.Prime vertical circle
B.Principal vertical circle
C.Parallels of altitude
D.Horizon -
单项选择题
In order for a star to be used for a sight at lower transit，the star must（）.
A.be circumpolar
B.have a declination equal to or greater than your latitude
C.have a GHA of 180°
D.have the SHA equal to or less than the LHA
