Isro chairman: Chances of retrieving satellite still alive

印度空间研究组织主席：仍有望找回卫星。

NEW DELHI: Indian Space Research Organisation (Isro) chairman Dr K Sivan on Sunday confirmed that the space agency's communication link with the recently launched Gsat-6A got snapped but said the space agency was trying to re-establish contact with the advanced communication satellite.

新德里：印度空间研究组织主席金思旺博士周日证实，该航天局与最近发射的Gsat-6A的通信联系被中断，但他表示航天局正试图与这枚先进的通信卫星重新建立联系。

Speaking to TOI, the Isro chairman said, "After the successful launch of Gsat-6A from Sriharikota on Thursday, Isro was supposed to perform three orbit-raising manoeuvres to take the satellite from the launch orbit to the designated orbit (geo stationary orbit that is at the altitude of 36,000 km). The first manoeuvre was performed successfully on Thursday. The second orbit-raising exercise was performed on Saturday. As the Isro ground station was gearing up for the third manoeuvre, the communication link with the satellite snapped."

印度空间研究组织主席对《印度时报》表示：“周四在斯里赫里戈达岛成功发射Gsat-6A后，印度空间研究组织本该执行三次轨道提升操作，将卫星从发射轨道带到指定轨道(对地静止轨道，高度为海拔36000公里)。周四成功进行了第一次操作。周六进行了第二轮轨道提升操作。正当印度空间研究组织地面站为第三次操作做准备时，地面站与卫星的通信连接断了。”

Orbit-raising means manoeuvring a satellite in space in stages in order to place it in its final orbit with the help of small thrusters.

轨道提升意味着在太空中分阶段控制卫星，以便在小型推进器的帮助下将卫星送入最终轨道。

译文来源：三泰虎 http://www.santaihu.com/44564.html

Dr Sivan said, "Our team is trying to re-establish the communication link with the satellite. Though the delinking of signal from a satellite is a common phenomenon, this time the signal delinking is happening for a longer duration. Even if the satellite's primary power has failed, we can use the back-up power like solar power if we are able to re-establish the contact with it."

思旺博士说：“我们的团队正试图重新建立与卫星的通信联系。虽然卫星信号的中断是常见现象，但这一次信号中断持续时间较长。即使卫星的主电源已经失效，如果我们能够重新建立联系，我们还可以利用太阳能之类的备用能源。”

TOI was the first to report about Isro going silent on Gsat-6A updates and the top Isro team holding an emergency meeting on the mission on Saturday.

《印度时报》最先报道了在周六的新闻发布会上，印度空间研究组织未能提供Gsat-6A的最新情况，以及印度空间研究组织的领导团队针对周六的任务召开了紧急会议。

Hopeful of retrieving the satellite, the Isro chief said, "Gsat-6A is not out of control and we still hope we can reestablish contact with the satellite."

这位印度空间研究组织的负责人说，“Gsat-6A并没有脱离控制，我们仍有望与卫星重新建立联系。”

On the location of the satellite, he said, "We know the approxmate location of the satellite in space by using other satellites and other resources."

至于卫星的目前位置，他说，“我们通过使用其他卫星和其他资源知道了卫星在太空的大致位置。”

With a life span of 10 years, the 2,066-tonne satellite, costing Rs 270 crore, was meant to provide mobile communication through multi-beam coverage. The satellite was also significant for the military for communication purposes in remote and border areas. This is because Gsat-6A's sixmetre-wide antenna is three times broader than those generally used in communication satellites. The big antenna was meant to enable the satellite to provide mobile communication across the country through handheld ground terminals. In other satellites, smaller antenna require larger ground stations. On the upcoming launches of navigation satellite IRNSS-1H and Chandrayaan mission, the Isro chief said, "Currently, there is no plan to defer these launches. They will go as per the schedule." This is the first mission for Dr Sivan, who assumed charge of the space agency in January.

这枚寿命约为10年的2066吨重的卫星，耗资270亿美元，将通过多波束覆盖提供移动通信服务。这颗卫星对军方在偏远和边境地区的通讯用途也很重要。这是因为Gsat-6A的六米宽天线比一般通信卫星的天线宽三倍。大天线可以使卫星能够通过手持地面终端在全国范围内提供移动通信。其他卫星较小的天线，则需要更大的地面站。被问及即将发射的导航卫星IRNSS-1H和月船任务，印度空间研究组织的负责人说，“目前没有推迟发射的计划，我们会按照原计划发射。”这是思旺博士于今年一月份接管航天局后的第一个任务。

In August last year, India's mission to launch its backup navigation satellite IRNSS-1H on board PSLV-C39 ended in a failure after the satellite got stuck in the heat shield. The navsat stuck in the heat shield, now declared space debris, is still roaming in the near-earth orbit and will ultimately fall on the earth.

去年8月，印度通过PSLV-C39上搭载发射备用导航卫星IRNSS-1H，因卫星被困在防热罩中，导致任务以失败告终。这枚被困在防热罩中的卫星，现在已被宣布为太空碎片，目前仍在近地轨道上漫游，最终将坠落到地球上。