印度空间研究组织的第100次火箭发射取得成功

Isro's 100th rocket launch from Sriharikota successful; GSLV-F15 places navigation satellite NVS-02 in orbit

印度空间研究组织（ISRO）从斯里赫里戈达进行的第100次火箭发射取得成功，地球同步卫星运载火箭GSLV-F15将导航卫星NVS-02送入轨道。

SRIHARIKOTA: The Indian Space Research Organisation (Isro) on Wednesday set a new milestone by successfully placing a second-generation navigation satellite in orbit. Isro used a Geosynchronous Satellite Launch Vehicle (GSLV) in its 100th rocket launch from Sriharikota.

GSLV-F15 carrying NVS-02 navigation satellite lifted off from the second launch pad at Satish Dhawan Space Centre in Sriharikota at 6.23am. Around 19 minutes later, the rocket placed NVS-02 in a 322.93km geosynchronous transfer orbit.

Isro chairman V Narayanan said that the Isro has launched six generation of rockets placing 548 satellites weighing a total 120 tonnes including 23tonnes of 433 foreign satellites. Several significant launch like three Chandrayaan missions, Mars Orbitor Mission, Aditya-L1, 104 satellites in a mission, Navigation and earth observation satellites.

斯里赫里戈达消息：周三，印度空间研究组织（ISRO）成功将一颗第二代导航卫星送入轨道，树立了新的里程碑。ISRO在斯里赫里戈达进行的第100次火箭发射中，使用了地球同步卫星运载火箭（GSLV）。

搭载着NVS-02导航卫星的GSLV-F15于上午6点23分从斯里赫里戈达萨蒂什·达万航天中心的第二发射台发射升空。大约19分钟后，火箭将卫星NVS-02送入了322.93千米的地球同步转移轨道。

ISRO主席V·纳拉亚南表示，ISRO已发射了六代火箭，将548颗卫星送入太空，这些卫星总重120吨，其中包括来自国外的433颗卫星，重量达23吨。ISRO还完成了多项重大发射任务，如三次月球探测任务（月船号任务）、火星轨道器任务、“阿迪蒂亚 - L1” 任务、一次发射104颗卫星的任务，以及导航卫星和地球观测卫星的发射。

"In the coming days, orbit raising will be performed to place the satellite in its assigned orbit," he added.

S Unnikrishnan Nair, director, Vikram Sarabhai Space Centre, said, "I am sure we can achieve the 200th mark faster because of the vibrant ecosystem."

It was GSLV's 17th flight and 11th flight with an indigenous cryo stage. It was also the eighth operational flight of GSLV with an indigenous cryogenic stage.

NVS-01, the first of the second-generation navigation satellites, was flown with an indigenous atomic clock on May 29, 2023. Like its predecessor, NVS-02 has been configured with navigation payload in L1, L5 and S band in addition to ranging payload in C-band.

The 2250kg NVS-02 will replace IRNSS-1E. NVS-02 uses a combination of indigenous and procured atomic clocks for precise time estimation. The heart of the navigation payload is the Rubidium Atomic Frequency Standard (RAFS), an atomic clock which acts as a stable frequency reference for the navigation payload.

他补充道：“在接下来的几天里，将进行轨道提升操作，把卫星送入指定轨道。”

维克拉姆·萨拉巴伊空间中心主任S·乌尼克里什南·奈尔表示：“鉴于充满活力的生态系统，我相信我们能更快达成第200次发射的目标。”

这是GSLV的第17次飞行，也是使用国产低温上面级的第11次飞行。这同样是搭载国产低温上面级的GSLV的第8次执行任务飞行。

2023年5月29日，首颗第二代导航卫星NVS - 01搭载国产原子钟发射升空。与前一颗卫星类似，NVS - 02除了配备C波段的测距有效载荷外，还配置了L1、L5和S波段的导航有效载荷。

重达2250千克的NVS - 02将取代IRNSS - 1E。NVS - 02采用了国产和采购的原子钟相结合的方式，以实现精确的时间估算。导航有效载荷的核心是铷原子频率标准（RAFS），这是一种原子钟，为导航有效载荷提供稳定的频率参考。

Navigation with Indian Constellation (NavIC) is India’s independent regional navigation satellite system designed to provide accurate position, velocity and timing (PVT) service to users in India as well as in regions extending around 1,500 km beyond Indian land mass.

NavIC will provide two types of services -- Standard Positioning Service (SPS) and Restricted Service (RS).

NavIC’s SPS provides a position accuracy of better than 20 metre and timing accuracy of better than 40 nanoseconds over the service area.
Five second-generation NavIC satellites -- NVS-01/02/03/04/05 -- have been planned to augment the NavIC base layer constellation with enhanced features for ensuring the continuity of services.

The NVS series of satellites incorporate L1 band SPS signals to improve adoption of NavIC services.

The key applications of NavIC include strategic applications, terrestrial, aerial and maritime navigation, precision agriculture, geodetic surveying, fleet management, location-based services in mobile devices, orbit determination for satellites, internet-of-Things (IoT)-based applications, emergency services and timing services.

印度区域导航卫星系统（NavIC）是印度自主的区域导航卫星系统，旨在为印度境内以及印度陆地边界向外延伸约1500公里区域内的用户，提供精确的位置、速度和授时（PVT）服务。

NavIC将提供两种类型的服务——标准定位服务（SPS）和限制服务（RS）。

NavIC的标准定位服务在其服务区域内，可提供优于20米的定位精度以及优于40纳秒的授时精度。

已规划发射五颗第二代NavIC卫星（NVS - 01/02/03/04/05），用于扩充NavIC基础层星座，通过增强功能确保服务的连续性。

NVS系列卫星整合了L1频段的标准定位服务信号，以促进NavIC服务的应用推广。

NavIC的关键应用领域包括战略应用、陆地、空中和海上导航、精准农业、大地测量、车队管理、移动设备中的基于位置的服务、卫星轨道确定、基于物联网（IoT）的应用、应急服务以及授时服务。

以下是印度网友的评论：

Sridhar Nyapathi

Congratulations. We are proud of you.

祝贺祝贺，为你们感到自豪

Rakesh

ISRO is all about South Indians.. While North Indians are taking a dip, South Indians are taking India to the space