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equation: condition | 条件方程式
| An equation which expresses exactly certain relationships that must exist among related quantities, which are not independent of one another... more | 表示相关量存在的某种关系的等式，这些量不是彼此独立的，先验存在，与观测值所要求的关系不同。 |
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equation: correlate | 联系数方程 | An equation derived from an OBSERVATION or CONDITION EQUATION, using undetermined multipliers, and expressing the condition that the sum of ... more | 由观测方程或条件方程导出的一种方程。其导出方法是：使用不定因子，将不定因子引入观测方程或条件... more |
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equation: error | 误差方程
| The probability equation which expresses the laws of the occurrence of ACCIDENTAL ERRORS. The error equation is the basis of the method of L... more | 表示偶然误差事件规律的概率方程。误差方程是最小二乘法的基础。最小二乘法在测量平差中使用，用来... more |
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equation: Laplace | 拉普拉斯方程
| An equation which expresses the relationships between ASTRONOMIC AZIMUTH, GEODETIC AZIMUTH, and the ASTRONOMIC LONGITUDE and GEODETIC LONGIT... more | 表示天文方位角，大地方位角和天文经度、大地经度之间关系的等式。 |
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equation: normal | 法方程
| One of a set of simultaneous equations derived from OBSERVATION, CONDITION or CORRELATE EQUATIONS. In a least-squares adjustment, values o... more | 由观测方程、条件方程或相关方程导出的一组联立方程中的某一方程。在最小二乘法平差中，用法方程解... more |
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equation: observation | 观测方程
| A CONDITION EQUATION which connects interrelated unknowns by means of an observed function. | 通过观测函数把相关未知数连接起来的一种条件方程。 |
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equation: personal | 个人观测误差
| See PERSONAL EQUATION. | 感知某一现象与对其作出反应之间的时间间隔。个人观测误差有正有负，因为观测者既可能预知事件的发... more |
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equation method | 方程法
| In tidal terminology, an elaborate non-harmonic method for the prediction of TIDES. | 在潮汐领域指预报潮汐的一种非调和方法。 |
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equation of time | 时差
| The CORRECTION to be applied to 12 hours plus UNIVERSAL TIME to obtain the Greenwich HOUR ANGLE of the SUN, or more generally the CORRECTION... more | 格林尼治太阳时与世界时加12小时所得时间之差，或者更普遍的本地的平均时与本地的太阳时角加12小时所... more |
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equator | 赤道
| The PRIMARY GREAT CIRCLE of a sphere or SPHEROID such as the EARTH, perpendicular to the polar AXIS. | 球体或者旋转椭球体上（例如地球）与极轴垂直的主大圆。 |
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equator: astronomical | NULL | A line connecting points having 0° ASTRONOMICAL LATITUDE. | NULL |
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equator: celestial | 天球赤道
| The GREAT CIRCLE on the CELESTIAL SPHERE whose plane is perpendicular to the AXIS of the EARTH. Also called equinoctial. | 垂直于地轴的平面在天球上截得的大圆。亦称equinoctial（天体赤道）。 |
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equator: geodetic | 大地赤道
| The line on the SPHEROID connecting points of 0° GEODETIC LATITUDE. | 参考椭球体上大地纬度为零的各点的连线。 |
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equator: heat | 热赤道
| See EQUATOR: THERMAL. | 参见thermal equator（热赤道）。 |
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equator: magnetic | 磁赤道线 | That line on the surface of the EARTH connecting all points at which the magnetic DIP is zero. Also called aclinic line. | 地球表面磁倾角为零的各点的连线。亦称aclinic line（无倾线）。 |
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equator: terrestrial | 地球赤道 | A GREAT CIRCLE of the EARTH in the plane of the CELESTIAL EQUATOR, and equidistant from the two POLES. | 天赤道平面在地球上截得的大圆，它离两极的距离相等。 |
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equator: thermal | 热赤道 | Line which circumscribes the EARTH and connects all points of highest mean annual temperature on each MERIDIAN. Also called heat equator. | 地球各子午线上年平均气温最高的点的连线。亦称heat equator。 |
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equatorial calms | 赤道无风带
| Zone of calm or light variable WINDS encountered, in certain regions, between the TRADE WINDS of the two hemispheres. | 位于南北两半球信风带之间的无风或者风向多变的微风区域。 |
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equatorial horizontal parallax | 赤道地平视差
| See PARALLAX. | 在赤道观测到的地平视差最大值。 |
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equatorial tide(s) | 赤道潮
| See TIDE. | 当月球位于赤道上方时出现的潮汐，大约每两个星期发生一次。发生赤道潮时，月球产生最小的日潮不等... more |