着陆:海员的太空生命线

在本周的“实地”节目中，我们来看看用于太空的技术，这些技术已经在地球上找到了新家，物理学家斯图尔特·希金斯将听到印度太空计划是如何为海员提供生命线的……

斯图尔特-当太空科学技术降落到地球上会发生什么?欢迎来到《裸体科学家》的地球之旅，这是一部探索太空技术在地球金宝搏app最新下载上的应用的迷你系列节目。我是斯图尔特·希金斯博士。在这一集中，我们来看看印度的太空计划是如何帮助拯救渔民的生命的。印度空间研究组织(ISRO)成立于1969年。它的目标是利用空间技术促进国家发展和科学研究。作为这项任务的一部分，ISRO创建了印度国家卫星系统，这是一系列卫星，虽然在太空中，但很大程度上是指向地球的。它们装有天气监测仪器，以及用于电信、电视广播和搜索和救援行动的无线电发射机。正是后者导致了一项带有压力警报发射器的太空技术衍生产品。这是一个应急信标，可以安装在渔船上，在紧急情况下用来联系海岸警卫队。 While similar systems were already available, the ISRO system took advantage of the Indian National Satellite System to provide continuous coverage for the Indian Ocean. This is because the satellites are placed in a geostationary orbit. (Music) The speed with which a satellite orbits the Earth depends upon its height above the surface. Objects in low earth orbits with few hundred kilometres travel faster than those higher up. This means they orbit the Earth multiple times per day. In a case of an emergency beacon, it’s critical for the distress signal to get through at any time of day, not just when a satellite happens to be orbiting overhead. One way to achieve this is to place the satellite into geostationary orbit which is about 36,000 kilometres above the Earth’s surface. At this orbit, the relative motion of the satellite matches the rotation of the Earth. So the satellite effectively sits by the same point on the equator without changing position. ISRO’s distress alert transmitter uses a combination of the Indian National Satellite System and the Global Positioning System, GPS. So in the event of an emergency on-board a boat, the distress alert transmitter is activated by pressing a button corresponding to the type of emergency. Initially, a GPS receiver determines the boat’s location. This plus the type of emergency is transmitted by a radio up to the Indian National Satellite System. A satellite relays the signal back down to a base station on the mainland, alerting the coast guard. Although simple to use, the distress alert transmitter relies upon some serious space technology to help save lives.

以上就是《裸体科学家》的《地球之旅》，欢迎再次加入我，了金宝搏app最新下载解更多改变地球生活的太空技术。