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MULTI-ORBIT MISSION BY PSLV-C3 AND FUTURE LAUNCH OPPORTUNITIES

机译：PSLV-C3的多轨任务和未来发射的机会

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摘要

Polar Satellite Launch Vehicle (PSLV), the Indian operational launcher, completed its sixth flight PSLV-C3 on 22nd October 2001 from Sriharikota Launch Range (SHAR). It was the fifth successive successful mission, proving the reliability and versatility of the medium lift vehicle developed by Indian Space Research Organisation (ISRO). In this flight, along with the primary remote sensing satellite TES of ISRO, two auxiliary payloads, viz BIRD from M/s DLR, Germany and PROBA from M/s Verhaert, Belgium were also deployed. While Technology Experimental Satellite (TES) and Bispectral and Infrared Remote Detection (BIRD) were injected into a nominal 568 km circular sun synchronous polar orbit (SSPO), PROject for On-Board Autonomy (PROBA) was released at a higher altitude into a 568X638 km elliptical orbit. An orbit raise manoeuvre utilising guidance margin reserve propellant available in the fourth stage was performed prior to PROBA injection. The three axis stabilised orbit raise burn was executed by the axial RCS thrusters firing in off-modulated mode. The high precision achieved in the orbital parameters of all three satellites has validated the navigation, guidance and control scheme implemented. The successful realisation of this multi-orbit mission by ISRO has opened up opportunities and mission flexibility for small satellite launches on PSLV, which has a provision to carry two 120 kg class satellites as passenger payloads. This paper describes the specific strategies adopted and their outcome in PSLV-C3 to perform the multi-orbit mission. The on-board systems and ground segment features in terms of both hardware and software elements, including the Preliminary Orbit Determination (POD) scheme for PROBA deployment, are described. Further developments on PSLV with respect to high-performance third stage (HPS3) and single engine fourth stage (LI) towards performance enhancement and mission flexibility are presented. Forthcoming missions and commercial launch opportunities on PSLV are highlighted.
机译：印度的操作发射器极地卫星运载火箭（PSLV）于2001年10月22日从Sriharikota发射靶场（SHAR）完成了第六次飞行PSLV-C3。这是连续第五次成功执行任务，证明了印度空间研究组织（ISRO）开发的中型起重车的可靠性和多功能性。在这次飞行中，还与ISRO的主要遥感卫星TES一起，部署了两个辅助有效载荷，分别是德国M / s DLR的BIRD和比利时M / s Verhaert的PROBA。在将技术实验卫星（TES）和双光谱和红外遥测（BIRD）注入标称的568 km圆形太阳同步极地轨道（SSPO）时，机上自主性项目（PROBA）在更高的高度释放到568X638中km椭圆轨道。在PROBA注入之前，利用第四阶段可用的制导余量储备推进剂进行了升轨机动。三轴稳定的轨道上升燃烧是由轴向RCS推进器以非调制模式点火进行的。在所有三颗卫星的轨道参数中实现的高精度已经验证了所实施的导航，制导和控制方案。 ISRO成功完成了这一多轨道飞行任务，为PSLV上的小型卫星发射打开了机遇，并为它提供了灵活性，该卫星可以运载两枚120千克级的卫星作为旅客有效载荷。本文介绍了在PSLV-C3中执行多轨道任务所采用的特定策略及其成果。描述了就硬件和软件方面而言的车载系统和地面部分功能，包括用于PROBA部署的初步轨道确定（POD）方案。提出了PSLV在高性能第三阶段（HPS3）和单引擎第四阶段（LI）方面在性能增强和任务灵活性方面的进一步发展。着重介绍了PSLV上即将进行的任务和商业发射的机会。

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