Friday, 24 August 2012

ISRO ASSISTAN INTERVIEWS-2012

Hi friends it is very use full for interviews to know about ISRO CENTERS

VSSC at Thiruvananthapuram is the major center of ISRO, where the design and development activities of satellite launch vehicles and sounding rockets are carried out and made ready for launch operations. The centre pursues research and development activities for associated technologies such as launch vehicle design, propellants, solid propulsion technology, aerodynamics, aero structural and aero thermal aspects, avionics, polymers and composites, guidance, control, and simulation, computer and information, mechanical engineering, aerospace mechanisms, vehicle integration and testing, space ordnance, chemicals and materials.
Systems reliability and quality assurance of all aspects of engineering and operations are studied and evaluated to the levels of perfection required in each field. Programme planning and evaluation, technology transfer and industrial coordination, indigenization, human resources development, safety and personnel and general administration groups support the centre for all its activities. The Space Physics Laboratory at VSSC carries out research and studies in atmospheric science and other related space science activities.
Ammonium Perchlorate Experimental Plant (APEP) at Aluva in Kerala is a part of VSSC.
The major programmes at VSSC include launch vehicle projects of Polar Satellite Launch Vehicles (PSLV), Geosynchronous Satellite Launch Vehicles (GSLV Mark II and Mark III), Rohini Sounding Rockets, Space-capsule Recovery Experiments, Reusable Launch Vehicles and Air Breathing Propulsion for Advanced Reusable Launch Vehicles.
ISAC at Bangalore is engaged in developing satellite technology and implementation of satellite systems for scientific, technological and application missions. ISAC is functionally organised into five major areas: mechanical systems area including structures, thermal systems and spacecraft mechanisms; digital and communications area including digital systems and communication systems; integration and power area comprising spacecraft checkout, systems integration and power systems; controls and mission area consisting of control system, mission development and computer and information; and facilities. Reliability and components area and programme planning and evaluation group provide relevant support to the centre. Project management teams co-ordinate the implementation of INSAT and IRS projects. Space astronomy and instrumentation division is engaged in space science activities. ISRO Satellite Integration and Test Establishment (ISITE) including a Comprehensive Assembly, Test and Thermo-vacuum Chamber (CATVAC) provide necessary support for qualification of sub-systems and systems to meet the requirements of space environment.
Achievements include design and development of more than 50 satellites so far of various types like scientific, communication and remote sensing.
SDSC SHAR, with two launch pads is the main launch centre of ISRO located at 100 km north of Chennai. SDSC SHAR has the necessary infrastructure for launching satellite into low earth orbit, polar orbit and geostationary transfer orbit. The launch complexes provide complete support for vehicle assembly, fuelling, checkout and launch operations. Apart form these, it has facilities for launching sounding rockets meant for studying the earth’s atmosphere.Achievements include establishment of launch complexes for Sounding rockets, SLV- 3, ASLV and PSLV. Launch complex augmented for GSLV. Director: Mr. M. Chandra Dathan
 ISTRAC is responsible for providing Space Operation services that include spacecraft control, TTC support services and other related projects and services, for the launch vehicle and low earth orbiting spacecraft and deep space missions of ISRO and other space agencies around the world. Development of RADAR systems for tracking & atmospheric applications and Establishment of Ground Segment Network for Indian Regional  Navigation Satellite System of ISRO are the additional responsibilities of ISTRAC.Indian Space Research Organization (ISRO), over the years, established a comprehensive network of ground stations to provide Telemetry, Tracking and Command (TTC) support to Satellite and Launch vehicle missions. These facilities are grouped under ISRO Telemetry, Tracking And Command Network (ISTRAC) with its headquarters at Bangalore, Karnataka State, INDIA. ISTRAC has TTC ground stations at Bangalore, Lucknow, SHAR (Sriharikota), Thiruvananthapuram, Port Blair Island, Brunei, Biak (Indonesia) and Mauritius, meeting international standards.
The Indian Deep Space Network (IDSN), commissioned during the year 2008, at Byalalu village near Bangalore forms the Ground segment for providing deep space support for India’s prestigious and first Lunar mission, the Chandrayaan-1. 
Space Applications Centre (SAC) is one of the major centres of the Indian Space Research Organisation (ISRO). It is a unique centre dealing with a wide variety of disciplines comprising design and development of payloads, societal applications, capacity building and space sciences, thereby creating a synergy of technology, science and applications. The Centre is responsible for the development, realisation and qualification of communication, navigation, earth & planetary observation, meteorological payloads and related data processing and ground systems. Several national level application programmes in the area of natural resources, weather and environmental studies, disaster monitoring/mitigation, etc are also carried out. It is playing an important role in harnessing space technology for a wide variety of applications for societal benefits. The organisational structure continues to remain dynamic, responding to the needs of the hour. SAC operates and maintains Ahmedabad Earth Station and the Delhi Earth Stations.
SAC is a host institution for the training programmes related to Satellite Communication, Satellite Meteorology and global change under the Centre for Space Science & Technology Education in Asia and the Pacific (CSSTEAP) affiliated to the United Nations (UN).

NARL at Gadanki near Tirupati is an autonomous society supported by Department of Space. NARL has now become one of the prime centers for atmospheric research in the country specializes in basic atmospheric research, indigenous technology development for atmospheric probing and weather and climate modeling. NARL regularly operates a state-of-the-art MST radar, Rayleigh / Mie Lidar, Boundary Layer Lidar, Sodium Lidar, Lower Atmospheric Wind Profiler, Sodar, Disdrometer, Optical Rain Gauge, Dual frequency GPS receiver, Automatic Weather Station apart from regular launching of the GPS balloon sonde. Being relatively young, NARL's research facilities are available for national and international scientists to conduct atmospheric research. Director –a.jayaraman

Laboratory for Electro Optics Systems  is engaged in design, development and production of Electro-Optic sensors and camera optics for satellites and launch vehicles. The sensors include star trackers, earth sensors, sun sensors & processing electronics. Optics Systems include both reflective and refractive optics for remote sensing and meteorological payloads. Other optical elements developed by LEOS for in-house use include optics for star sensor, optics for Lunar Laser Ranging Instrument (LLRI), optical masks for sun sensors, optical filters and encoders.
LEOS is actively involved in the development of new technologies for present / future satellites. This includes development active pixel sensor star tracker, Charge Coupled Device (CCD) based star tracker, Fiber Optics Gyro, Optical inter satellite link, high resolution camera optics, optical coatings and MEMS devices (magnetometer, accelerometer etc.). LEOS is situated at Peenya Industrial Estate, Bangalore where the first Indian Satellite Aryabhata was fabricated in 1975.


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