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Frequency Management Implementation of space programme requires access to orbit and spectrum resources. Frequency Management involves selection of suitable orbital slots and frequency spectrum as well as coordination of the same taking into account the mission requirements and national and international regulatory provisions. Orbit frequency coordination involves technical agreement with different countries to ensure coexistence with other satellite networks within the regulatory framework of International Telecommunications Union (ITU). Over the period, coordination of suitable geostationary orbital slots for C, Ku and S bands spectrum for INSAT satellites, coordination of wider coverage for INSAT, protection of S-band frequencies for Indian Remote Sensing satellites and launch vehicles, coordination of suitable frequencies for radar for atmospheric research and other applications have been accomplished. During the year, coordination for various satellite networks and filings were regularly reviewed and necessary filings with ITU were made to comply with international regulations. Orbit spectrum resources for INSAT have been protected through coordination meetings with other countries and by operating satellites from new orbital locations within the regulatory time limit. Frequency management also involves planning the spectrum requirements for space services at both national and international levels and ensuring availability of these resources. During the year coordination meetings were held with Indonesia and China. During the launch of EDUSAT in September 2004, the transfer orbit coordinations were held with other satellite operators. Regulatory processes for obtaining frequency clearances for Navigation Satellite and Chandrayaan-1 Mission have been initiated. Systems Reliability Rigorous quality control, quality assurance and test and evaluation activities continued during the year towards realising space systems with reliable operation. Launching of EDUSAT on board GSLV-F-01 was accomplished with high precision. All the subsystems on board EDUSAT are functioning satisfactorily. Quality assurance support for various subsystems of GSLV-F-01 and for the forthcoming launch of PSLV-C6 was provided during the year. Uniform stage clearance practices were adopted for process/product realisation at different work centers. Reliability estimates and trend analysis of all systems/ subsystems of GSLV-F-01 and PSLV-C6 were carried out. The assembly, integration and check out of spacecraft subsystems for EDUSAT involved evaluation of ground support equipment, review of test procedures and methods, test data analysis and non-conformance management. Integrated spacecraft thermovac test for the satellites was also carried out during the year. Active and passive electronic components were screened before use in the subsystems of both launch vehicle and spacecraft. Necessary software and hardware were developed to screen special and non-standard devices. Performance analysis of HMCs and other devices were also carried out. Product Assurance Board for launch vehicle and spacecraft met regularly and reviewed the adequacy of systems reliability requirements. Maintenance of certification to ISO-9000 quality systems was continued through close interaction with various divisions and groups at ISRO centers. Activities were also initiated by centers/units which are yet to obtain ISO-9000 certification. Upgradation of ISO-9000 for 2000 version were carried out. Under the indigenisation of space components and materials, several electronic components and advanced materials were qualified during the year and are being used progressively in the ongoing projects. Efforts to qualify several strategic components for indigenisation were also initiated. Safety Services During the year, the launch of GSLVF-01 with EDUSAT on board, was carried out without any safety related incidents. Launch campaign activities involved in handling of cryogenic fluid, toxic liquid propellants, solid propellant, pyrotechnic materials, high pressure systems, material handling , etc. All safety measures were taken in these activities. Safety groups at various DOS Centres continued to provide support at various stages such as production of solid rocket motors and servicing and testing of liquid and cryo stage engines, production of liquid and cryo propellants, manufacturing of pyrotechnics, transportation of hazardous materials and assembly of satellite components and design and construction of facilities. The preparation of GSLV hardware at various workstations such as SDSC SHAR, VSSC and LPSC, called for equally challenging safety measures. The transportation of all GSLV systems and transportation of earth storable propellants such as UH-25, N 2 O 4 , MMH, MON and cryo propellants such as liquid hydrogen, liquid oxygen and liquid nitrogen was carried out under the umbrella of a well-coordinated safety net. Safety teams took precautions such as rescue and emergency operations, on-site and off-site plans, identification of route and parking areas during the transportation, etc. With regard to the fire incident, which occurred in February 2004 at SDSC SHAR, the recommen-dations of the high-power committee constituted for investigation of the accident have been implemented in solid propellant manufacturing area. The plant has started production of solid rocket motors. Safety clearance for construction of new buildings/facilities and critical process activities have been given for construction of S-200 solid propellant plant at SDSC SHAR for GSLV-Mk-III Project. Detailed safety review has been made for the second launch pad facilities and fire fighting systems at SDSC-SHAR. The ozone depleting Halon fire fighting system has been replaced with environment friendly FM-200 system in second launch pad facilities. The operations at LPSC, like development tests of CUSP engine, LH2 tank proof pressure test, test of single element injector, testing of high pressure VIKAS engine for L110 stage, qualification of earth storable engines High Altitude Test were carried out without any safety lapses. Cryogenics fluid production and ongoing earth storable propellant activities have also been carried out enforcing all safety procedures. Safety support was extended during production of liquid hydrogen, liquid oxygen and liquid nitrogen. Safety systems GSLV-Mk-III C-20 development have been identified and installation is in progress. Safety clearances were accorded for critical operations under C-25 programme. Detailed studies have been made on storage of high pressure gas for Hypersonic Shock tunnel facility, Liquid nitrogen storage and disposals and cryogenic upper stage tanks under pneumatic pressure. Safety clearances have been given for transportation of heat shield fairing containing explosives, hazardous tests/process, etc.
In the satellite area, safety surveillance during fabrication, thermovac test, vibration tests, high-pressure tests of EDUSAT, INSAT-3A and CARTOSAT-1 were the highlights. Safety groups at VSSC, SDSC SHAR, LPSC, MCF, Hassan, and ISTRAC at Bangalore, SHAR and other ground stations carried out detailed safety audit of the facilities. Inter centre safety committee reviewed the safety systems planned for MCFBhopal facilities and gave recommendations. Safety audit and preparation of ISRO level safety standard manuals have also been undertaken. Safety awareness and promotional activities have continued during the year through observation of national safety day, fire service day, issuing safety posters, screening of safety films, in plant safety training programme, etc. Liaison with the statutory authorities such as Chief Controller of Explosives, Nagpur and State Pollution Control Boards was maintained to ensure that statutory requirement for hazardous installations are adhered to. Civil Engineering The Civil Engineering Division (CED) of DOS carries out planning, designing and execution of civil works for the space programme. During the year, the major works completed were magazine building, liquid stage storage building and additional hostel building at SDSC SHAR, administration and auxiliary services block for acoustic test facility, solid propellant hydroclave building for VSSC and library building at MCF, Hassan. The works in progress include those for GSLV-Mk III project at SDSC SHAR, LPSC, Mahendragiri, for CARTOSAT project at ISAC and for RISAT project at SAC.
Additional quarters have also been constructed in several centres of DOS. In addition CED has taken up works for other ministries like Department of Electronics and Department of Ocean Development. |
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