查询词典 longitude

The question for early navigators was which of these lines would be called the Rose Line—the zero longitude—the line from which all other longitudes on earth would be measured.

于是，早期的航海者就遇到了这样一个问题——如何确定玫瑰线，即零度经线，并依此来确定其他的经线的度数。

It became an important part of navigation, as mariners relied on accurate time measurements to calculate longitude.

它成了航海业重要的一部分，因为水手依赖于精确的时间来计算经度。

All orbits by which targets can be covered are described according to the longitude of ascending node.

以升交点经度的范围来描述所有能覆盖到目标的轨道。

Using the analytic results above, in chapter 4, a special data relay constellation is designed for space station, which include mainly the selection of orbit altitude, eccentricity, inclination, longitude of ascending node, the number of orbit and distribution of satellite.

探讨了卫星相对于天基的运动特性，并利用地基运动特性的结果，得到了卫星相对于空间站在过顶时间限制条件下的升交点取值范围。

The analysed results show that among the 106 earthquakes of above magnitude 7.0 in 20th century,there are 71% occurred in the period when angle between Moon′s path and the celestial equator turns small and there are over 62% happened when the lunar longitude of ascending node lies from 350° to 210°.

分析结果表明，本世纪106次7.0级以上大地震71%发生于月亮轨道与赤道交角变小阶段，62%以上发生于月亮升交点黄经位于350°～210°期间。

The determination method of descending/ascending node, longitude of ascending node and frozen orbit parameters for sun-synchronous orbit satellite design was analyzed on the basis of six general orbital elements.

在轨道六要素的基础上，分析了卫星太阳同步轨道设计时降交点地方时、升交点赤经，以及冻结轨道参数等的确定方法。

The determination method of descending/ascending node, longitude of ascending node and frozen orbit parameters for sun-synchronous orbit satellite design was analyzed on the basis of six general orbital elements.

引言卫星的轨道设计一般可分为地面覆盖、轨道复现、卫星组网、星下点照明和卫星受照要求等几类[1]。

Synodic month 朔望月 The time taken for the moon to reappear at the same ecliptic longitude of the Sun as seen from Earth, which averages 29.53 days.

月球连续两次到达与太阳相同黄经的时间。一个朔望月平均有 29.53 日。

Taking Mars in the Jiyuan Li (1106) as an example, the result shows that the average error of its mean geocentric longitude in a synodic period is about 4'.

具体算法由两个步骤组成：首先，按照行星与地球绕日匀速运动的假设，来推算行星视运动的地心平黄经；然后，对平黄经进行修正，由此获得所求时刻行星的地心真黄经。

Modern and practical astronomy was developed in the 18th century, and successively from the theoretical and practical solution to the Sino-satellite instrument measuring time, too Seoul Scott multi-satellite measurements such as latitude, as well as simultaneous determination of longitude and latitude Supreme Court means the emergence of theodolite, contour instrument, the satellite instrument, zenith instrument, photographic zenith tube, sextant and other useful astronomical instruments, the most commonly used is the optical theodolite .20 century, all-round practical field of astronomy 60 years after the emergence of new technologies, such as satellite Dhoop Le observation and satellite laser ranging, not only the accuracy of more than optical observations, but also greatly improved operating speed, and can provide direct point of geocentric coordinates of the ground.

现代实用天文学是18世纪发展起来的，先后从理论和实践上解决了中星仪测时、太尔各特测纬以及多星等高法同时测定经度和纬度的方法，出现了经纬仪、等高仪、中星仪、天顶仪、照相天顶筒、六分仪等实用天文学仪器，最常用的是光学全能经纬仪。20世纪60年代以后实用天文学领域出现了崭新的技术，如人造卫星多普勒观测和人卫激光测距，不但精度超过光学观测，而且作业速度大大提高，并能直接提供地面点的地心坐标。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。