不过，在这个特殊的夜晚，中美洲和南美洲的观星人能看到月掩星的天象，月球掩或曰从昴星团的某些亮星前面经过。
Still, during this particular night, skygazers in South and Central America could even watch the 5 day old Moon occult or pass in front of some of the brighter Pleiades stars.
与单颗leo卫星相比，由多个卫星组成的LEO星座观测到的掩星事件在时空分辨率和数量上都有很大的提高。
LEO constellation composed of two or more satellites can improve the time and space resolution and increase the number of occultation events greatly compared with a single LEO satellite.
但后来当那些恒星掩星揭示了冥王星出人意料的大气层后，我就迷上了这方面的研究。
But after those stellar occultations revealed its unexpected atmosphere, I was hooked on Pluto atmosphere research.
某星被月球的掩星现象出现在地球赤道的天顶上。
The grazing occultation of the star by the Moon is observed in the zenith at the Earth's equator.
当时，人们用望远镜观察比冥王星更远的星体(被称为恒星掩星)时发现冥王星存在甲烷大气层，而且可能正在快速向宇宙空间流失。
That's when telescope observations of distant stars going behind Pluto (known as stellar occultations) showed that it had a methane atmosphere, probably rapidly evaporating to space.
因为月球和明亮的行星出现在天空中黄道平面附近，这种掩星事件也很平常，但是它们也很富有戏剧性，特别是在望远镜影像里。
Because the Moon and bright planets wander through the sky near the ecliptic plane, such occultation events are not uncommon, but they are dramatic, especially in telescopic views.
无线电掩星技术能提供高精度、高垂直分辨率、全球覆盖的地球电离层和中性层大气剖面。
Radio occultation technique can provide the Earth's ionospheric and neutral atmosphere with high accuracy, high vertical resolution and global coverage.
不同的LEO卫星，将使发生的掩星事件数量和分布有所差别。
If LEO satellite orbit changes, then the GPS occultation events number and distribution will be different.
无线电掩星技术是一种探测地球大气的崭新途径。
The radio occultation technique is a new way to explore the Earth's atmosphere.
对特定掩星事件的数据进行了反演计算，并对计算结果进行了分析。
The computation with data of certain occultation event is done and the results are analyzed.
本文在几何光学和薄相位屏的假设下，分别介绍GPS/LEO无线电掩星反演地球大气技术中振幅反演的计算方法。
Under the assumptions of geometric optics and thin phase screen the retrieval algorithms of amplitude in GPS/LEO occultation technique were listed in this paper, respectively.
我国古代有相当丰富的月掩星观测记录。
There are an abundance of the lunar occultation records in ancient China.
探讨了空基无线电掩星技术应用于遥感地球大气参数方法，并将该方法编制成资料处理软件。
The way of remote sensing of terrestrial atmospheric parameters using space borne GPS radio occultation technique is discusses in this paper.
电离层掩星观测中，当低轨卫星(LEO)轨道高度较低时，轨道以上的电离层电子总含量(TEC)对掩星反演的影响不能忽略。
When the low-Earth orbit (LEO) satellite is low, the contribution of the Total Electron Contents (TEC) above the satellite is not neglectable for inversion of GPS-LEO ionospheric occultation.
但天文学家们不必等那久来证实他们对太阳系外层的理解。斯卡德和他的团队已经掌握了其它柯伊伯带星体的掩星。
Astronomers won't have to wait that long to firm up their understanding of the outer solar system, though: Sicardy and his team already have occultations in hand from other Kuiper Belt objects.
不同的LEO卫星，将使发生的掩星事件数量和分布有所差别。
If LEO satellite orbit changes, then the GPS occultation event's number and distribution will be different.
通过红外波段的日掩星观测，已经确定该尘埃壳是由两个成分原组成。
From lunar occultation experiments at infrared wavelengths it has been determined that the dust shell can be represented by two components.
准确纪录掩星现象的时刻能提供有关行星大气，不同类型星体大小和准确的位置。
The precise timings of occultations provide information about planetary atmospheres , the dimensions of extended visible , radio , and x - ray objects , and the positions of objects.
介绍了国外、国内GPS无线电掩星技术研究进展。
Progresses abroad and at home in GPS radio occultation technique are briefly introduced.
以同步生成的模拟精度序列为参照，就掩星观测中电离层延迟对LEO卫星轨道误差的响应程度进行了估计和分析。
With the simultaneously generated precision series, the response of ionospheric phase delay to the LEO satellite orbit biases is assessed and analyzed.
详细研究了大气边界层水汽和温度变化对掩星观测高度、相位时延的影响；
The height and the excess phase variations of the occultation caused by water vapor and the temperature variety in the atmosphere boundary layer are studied in details.
介绍了利用GPS掩星反演地球中性大气参数的原理。
The theory and the procedure of inversion of Earth′s neutral atmospheric parameters with GPS occultation are briefly introduced.
详细描述了无线电掩星的基本技术原理。
作为星载掩星技术的推广，基于飞机平台的无线电掩星技术备受关注。
As an extended technique of GNSS radio occultation (RO), the airborne RO sounding has attracted much wider attention.
但是这就增加了观测土星卫星多重掩星的机会。
But it does provide the opportunity to watch multiple transits of Saturn's moons.
去年11月，掩星出现了。
与单颗leo卫星相比，由多个卫星组成的LEO星座观测到的掩星事件在时空分辨率和数量上都有很大的提高。
A LEO constellation composed of two or more satellites can improve the time and space resolution and increase the number of occultation events greatly compared with a single LEO satellite.
与单颗leo卫星相比，由多个卫星组成的LEO星座观测到的掩星事件在时空分辨率和数量上都有很大的提高。
A LEO constellation composed of two or more satellites can improve the time and space resolution and increase the number of occultation events greatly compared with a single LEO satellite.
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