Term 术语 Definition 定义
angular acceleration
角加速度
See ACCELERATION.
角速度的变化率。
angular distance
角距
The angular difference between two directions, numerically equal to the angle between two lines extending in the given directions. The arc o... more
The angular difference between two directions, numerically equal to the angle between two lines extending in the given directions. The arc of the GREAT CIRCLE joining two points, expressed in angular units.
两个方向之间的角度差,数值上等于两个方向延伸线的夹角。 连接两点的大圆弧,用角度单位表示。
angular distortion
角变形,角度畸变
See DISTORTION.
在制图学中,由于投影的非正形性所产生的变形。
angular parallax
角视差
See PARALLACTIC ANGLE.
参见parallactic angle(视差角)。
angular rate
角速率
See SPEED: ANGULAR.
参见angular speed(角速度)。
angular speed
角速度
See SPEED.
单位时间内的方向变化。也称作angular rate 或者angular velocity(角速率)。
angular velocity
角速度
See SPEED: ANGULAR.
参见angular speed(角速度)。
annotation
注记
Any marking on illustrative material for the purpose of clarification, such as numbers, letters, symbols, and signs.
在图文资料上用于解释和描述的任何标注,如数字、字母、符号和标记。
annual aberration
周年光行差
See ABERRATION OF LIGHT.
参见aberration of light(光行差)。
annual change
年变,周年磁变
See MAGNETIC ANNUAL CHANGE.
参见magnetic annual change(周年磁变)。
annual inequality
(潮汐)周年不等
Seasonal variation in water level or tidal current speed, more or less periodic, due chiefly to meteorological causes.
主要由气象条件造成的水位和潮流速度的季节性变化,这种变化在一定程度上具有周期性。
annual parallax
周年视差
See PARALLAX.
以天体为顶点的、地球轨道半径所对的角。也称作heliocentric parallax(日心视差)或stellar parallax(恒星视差)。
annual variation
年变化,年差,年变率
See MAGNETIC ANNUAL VARIATION.
参见magnetic annual variation(周年磁变)。
annular eclipse
(日)环食
See ECLIPSE.
在遮蔽体周围出现微弱光环的现象。存在日环食,但不存在月环食。
anomalistic month
近点月
See MONTH.
指月球绕地球公转连续两次经过近地点(或远地点)的时间间隔。近点月为27.55455平太阳日。
anomalistic year
近点年
See YEAR.
地球从近日点到近日点绕太阳公转一周所需的时间。1900年平均为365天6小时13分钟53秒,之后每个世纪增加0.26秒。
anomaly
异常;距平,近点角
Deviation from the normal or natural characteristics of a PHENOMENON. Abnormality. In ASTRONOMY, true anomaly is the angle at the SUN betwee... more
Deviation from the normal or natural characteristics of a PHENOMENON. Abnormality. In ASTRONOMY, true anomaly is the angle at the SUN between lines connecting the SUN with a PLANET and with the PLANET's PERIHELION. Mean anomaly and eccentric anomaly are also considered.
某一现象偏离正常或自然特性的现象。 在天文学中,指太阳和某行星的连线与太阳和行星近日点连线之间的夹角。同样也可定义平近点角和偏近点角。
anomaly: gravity
重力异常
See GRAVITY ANOMALY, BOUGUER ANOMALY, FREE AIR ANOMALY, ISOSTATIC ANOMALY.
某地实测重力值归算到海平面,与根据重力公式计算的理论值之间的差别。参见bouguer anomaly(布格异常),FREE-AIR ANOMALY(自由空间异常),isostatic anomaly (均衡异常)。
anomaly: magnetic
磁力异常
See LOCAL MAGNETIC DISTURBANCE.
参见local magnetic disturbance(局部磁干扰)。
Antarctic circle
南极圈
The GEOGRAPHIC PARALLEL having a south LATITUDE equal to the complement of the DECLINATION of the WINTER SOLSTICE (latitude = 66° 33' S appr... more
The GEOGRAPHIC PARALLEL having a south LATITUDE equal to the complement of the DECLINATION of the WINTER SOLSTICE (latitude = 66° 33' S approximately).
南纬纬度等于冬至点赤纬余角的地理纬圈(约为南纬66°33′)。