A.used with the equation of time
B.used in the form of LHA Aries
C.calculating the time of moonrise
D.determining local apparent time
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A.as the basis for star charts
B.to enter a star finder
C.in sight reduction using Pub 249
D.in sight reductions of planet observations
A.calculating amplitudes
B.calculating great circle sailings by the Agiton method
C.entering the Air Navigation Tables (Selected Stars) Pub 249
D.plotting on star finders
A.refraction of light as it enters the Earth's atmosphere
B.rotation of the Earth on it's axis
C.the body's orbital motion during the time required for its light to reach Earth
D.a false horizon
A.is nearest to the Earth
B.is farthest from the Earth
C.is on the opposite side of the Earth from the Moon
D.and Moon and Earth are in line
A.Sirius
B.Canopus
C.Venus
D.Jupiter
最新試題
英版《航海天文歷》高度修正表中太陽高度總改正表的查表引數(shù)是()
下列哪項不是高度差法求天文船位線的三要素?()
測者可自行校正的六分儀誤差有:①定鏡差;②指標差;③動鏡差。三者正確的校正順序是()
英版《潮汐表》中,潮高差是()
關于英版《航海天文歷》高度修正表中的太陽高度總改正表的說法正確的是()
航海上測定指標差時,可以利用()①星體②太陽③水天線
航海六分儀的指標差太大會給觀測帶來不便,因此當指標差大于()時,就應該縮小它。
在六分儀上直接讀取金星的觀測高度,并利用《航海天文歷》求金星的真高度,則需要修正哪些誤差?()①器差②指標差③眼高差④綜合改正⑤附加改正
根據(jù)《航海天文歷》查取天體位置的查表引數(shù)是()
將觀測高度修正為真高度時,不必進行視差改正的天體是()