ISRO News & Discussions

Discussion in 'Science & Technology' started by Varad, Apr 17, 2011.

  1. Agent_47
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    Space mission clears lab test

    The IAF’s Institute of Aerospace Medicine (IAM), which would be entrusted with the crucial role of screening and selecting the astronauts for the country’s maiden human space flight mission, has already initiated the ground work by developing state-of-the-art laboratories.

    The Bangalore-based institute, which was an integral part of the Indo-Soviet manned space flight in the 1980’s, has developed various laboratories that can be used for screening potential astronauts. The institute also played a role in the medical monitoring team of India’s only cosmonaut Wing Commander Rakesh Sharma.

    The department of space and environment physiology has developed three laboratories, comprising the thermal chamber, micro gravity simulation, and lower body negative pressure (LBNP) laboratories. At the thermal chamber, temperature can be simulated to very high and low temperatures, which the astronauts could encounter during the mission.

    During the mission, the space craft would rotate around the earth about 16 times and the astronauts would be exposed to varying temperatures from minus to 60 plus degree centigrade.

    Space mission clears lab test - India - DNA
     
  2. vikas jat
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    vikas jat Captain SENIOR MEMBER

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    hmm hope for the best
     
  3. Steel
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    The Hindu : Sci-Tech / Science : PSLV-C18 to put four satellites in orbit
    [​IMG]
    It will be launched from Sriharikota on October 12; two satellites built by students
    Preparations are on for the lift-off of the Polar Satellite Launch Vehicle (PSLV-C18) from the spaceport at Sriharikota at 11 a.m. on October 12.

    GLOBAL TROPICAL WEATHER

    The rocket will put four satellites in the orbit: Megha-Tropiques, built by India and France to understand global tropical weather and climate; SRM Sat, built by the students of SRM University, near Chennai; Jugnu, a satellite integrated by students of the Indian Institute of Technology (IIT), Kanpur; and VesselSat from Luxembourg.

    The information sent by the instruments on board the Megha-Tropiques will help understand the behaviour of Indian monsoons and occurrence of cyclones, floods and droughts.

    HEAT SHIELD

    The PSLV has been fully integrated, said K. Radhakrishnan, Chairman, Indian Space Research Organisation (ISRO), on Tuesday from Bangalore. “The Megha-Tropiques and the three co-passenger satellites have been fully integrated with the vehicle. The heat-shield was closed last morning.” The heat-shield around the satellites protects them from the intense heat during the launch and the vehicle's ascent into the atmosphere. After the rocket reaches a certain altitude, the heat-shield falls off.

    Dr. Radhakrishnan said the final checks were under way. “On October 8, we will have a launch rehearsal. The vehicle readiness review will take place on October 9 followed by the Launch Authorisation Board meeting the same day itself. As of now, the launch is scheduled on October 12 at 11 a.m.”

    The PSLV-C18 — which will be the 20th PSLV to be launched — is the core-alone version of the four-stage PSLV, without the strap-on booster motors that will put the four satellites in orbit.

    Megha-Tropiques (Megha in Sanskrit means cloud and Tropiques in French is tropics) is one of the most advanced and complex satellites built to monitor the weather in the short-term and climate in the long-term in the tropical regions of the world. It is a joint project of ISRO and the French space agency, Centre National d'Etudes Spatiales (CNES).

    THERMAL ENGINE

    ISRO officials said the 1,000-kg satellite had been built to investigate the tropical regions which received the maximum energy from the sun than they radiated back into space.

    The excess energy received in the tropical region is used as a thermal engine and provides circulation in the atmosphere and the oceans.

    ‘LIFE CYCLE'

    “The complex processes between solar radiation, water vapour, clouds, humidity, precipitation and atmospheric motion determine the life-cycle of convective systems and influence the Indian monsoon in the tropical region,” the ISRO officials explained.

    From its perch in the sky at an altitude of 867 km, the Megha-Tropiques would help study, on a sustained basis, the rapidly developing weather systems in the entire tropical world. Thus, the information beamed by the Megha-Tropiques will be useful not only to India but to all the countries in the Indian Ocean region and other parts of the world.

    SCIENTIFIC PAYLOADS

    The satellite has four scientific payloads. The Microwave Analysis and Detection of Rain and Atmospheric Structures (MADRAS), built by ISRO and the CNES, will provide an estimation of rainfall, water vapour, liquid water, ice and surface wind. Scanner for Radiative Budget (SCARAB) will study the radiation received by the earth and reflected by it. The third instrument, Sondeur Atmospherique du Profil d'humidite Intertropicale par Radiometrie (SAPHIR) will investigate the humidity present in the tropical atmosphere.

    The CNES has built the SCARAB and the SAPHIR. The GPS-ROS (Global Positioning System- Radio Occultation System) from Italy will study the temperature and humidity at different altitudes.

    The ISRO Satellite Centre, Bangalore, integrated the entire satellite.

    The 10-kg SRM Satwill help in understanding global warming and pollution by studying carbon-dioxide and carbon-monoxide present in the atmosphere. The three-kg Jugnu has a camera to take pictures of the earth to monitor, vegetation, reservoirs, lakes, and ponds. VesselSat will help in locating the ships in the sea-lanes of the world.
     
  4. Steel
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    Steel Lieutenant SENIOR MEMBER

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    [​IMG]


    Final preparations are on for the October 12 launch of Indo-French ‘Megha-Tropiques’ satellite that would study tropical climate, from spaceport of Sriharikota, about 90 km from here.

    Integration of Megha-Tropiques and three nano satellites, that would be launched by ISRO’s workhorse PSLV-C18, with the rocket had been completed, ISRO spokesperson S. Sathish said.

    “PSLV C 18 is scheduled to be launched on October 12 at 11 a.m. from the Satish Dhawan Space Centre in Sriharikota. The countdown will start on Monday morning (October 10),” he told PTI.

    Megha-Tropiques would carry three payloads - two by France’s space agency CNES and one jointly by ISRO and CNES - and a complementary scientific instrument.

    ISRO has built the Megha-Tropiques spacecraft at a cost of Rs. 80 crore, along with an “equal contribution” from CNES.

    The satellite with a five-year life will investigate the contribution of water cycle in the tropical atmosphere to climate dynamics.

    The three nano satellites are one each from Luxembourg, IIT-Kanpur and SRM University, Chennai.

    IIT-Kanpur has indigenously built Nano satellite ‘Jugnu’, which will help in gathering information regarding flood, drought and disaster management.

    The data received from ‘Jugnu’ will be studied with the help of a tracking system installed at IIT-K and the received pictures and information from it will be used for research purpose, Head of mechanical department N.S. Vyas, the visionary man behind the making of the nano-satellite, said in Kanpur.

    This would be the fourth ISRO mission this year including one launched from French Guyana.


    The Hindu : Sci-Tech / Science : ISRO gears up for launch of Megha-Tropiques
     
  5. Agent_47
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    Countdown begins for PSLV-C18 launch

    To be launched tomorrow, it will put 4 satellites in orbit

    The countdown for the lift-off of India's Polar Satellite Launch Vehicle (PSLV- C18) began at Sriharikota at 9 a.m. on Monday. The rocket is scheduled to be launched at 11 a.m., Wednesday and it will put in orbit four satellites.

    They are the Megha-Tropiques satellite, SRMSat, Jugnu and VesselSat.

    S. Satish, spokesman for the Indian Space Research Organisation, said the Launch Authorisation Board, which met at Sriharikota on October 9, cleared the launch of the four-stage PSLV- C18 and “various activities during the 50-hour countdown are progressing smoothly.”

    Hundreds of mandatory checks on the launch vehicle and the satellite will take place. Batteries will be charged. The readiness of ground systems including communication networks and the radars for tracking the satellites will be checked.

    The Hindu : Sci-Tech / Science : Countdown begins for PSLV-C18 launch
     
  6. jack
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    jack FULL MEMBER

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    A weather sentinel to peer over the tropics

    [​IMG]

    The data provided by the Megha-Tropiques atmospheric research satellite will help provide insights into the patterns of rainfall in the world's tropical regions.

    After a difficult and, at times, uncertain gestation lasting over a decade, the Indo-French atmospheric research satellite, Megha-Tropiques, is at last ready to leave aboard the Polar Satellite Launch Vehicle (PSLV), from Sriharikota.

    Prior to the two countries joining hands in this effort, scientists in both countries, along with their respective space agencies, had been independently considering similar sorts of missions. In the late 1980s and the early 1990s, the French were examining the possibilities for a ‘Tropiques' satellite. The Indians, for their part, were thinking of a ‘Climatsat' satellite around the mid-1990s.

    The idea of merging these efforts came about as a result of contacts between scientists in the two countries.

    In 1998, the space agencies, the Indian Space Research Organisation (ISRO) and the Centre National d'Études Spatiales (CNES), decided to carry out a feasibility study. The following year, they signed a Statement of Intent. They would, in the words of a press release issued on the occasion, pursue cooperation on a mission “aimed at enhancing the understanding of tropical weather and climate.”

    The name chosen for the satellite, Megha-Tropiques, reflected the mission's goals. ‘Megha,' the Sanskrit word for clouds, underscoring a key focus of the satellite, and the French word ‘Tropiques' denoting its concentration on the tropical region.

    Subsequently, the ISRO and the CNES signed a Memorandum of Understanding (MoU) in 2001 to undertake a detailed design of the satellite. But then, amid heavy cuts in the French space agency's budget, the satellite's fate became decidedly uncertain. Finally, in late 2004, the agencies signed a second MoU that gave the green signal to proceed with development of the satellite.

    Link:The Hindu : Opinion / Lead : A weather sentinel to peer over the tropics
     
  7. Manmohan Yadav
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    Manmohan Yadav Brigadier STAR MEMBER

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    ISRO Rockets always look so pretty :smitten:
     
  8. sahil
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    sahil 2nd Lieutant FULL MEMBER

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    SRM's nano satellite to ride on PSLV today
    SRMSAT, a nano satellite developed by Chennai-based SRM University, is set to be launched into space on board the PSLV-C18 scheduled for take off from Sriharikota on October 12.

    Briefing reporters on the launch, SRM group chancellor T R Pachamuthu and president P Sathyanarayanan said the university also had plans to set up a Centre for Space Technology at its campus in Kattankulathur, near Chennai. It is in talks with the Indian Space Research Organisation (Isro) in this regard.
    ''Everything is at the planning stage. The talks will be carried forward once the launch of SRMSAT is over. It will take another five to six months to get a concrete shape'', said Sathyanarayanan.
    ''Once the Centre for Space Technology is established, we will introduce specialised courses on space technology to churn out more space scientists to meet the growing demand,'' said Pachamuthu. The proposed centre would focus more on research, he added.

    On SRMSAT, he said SRM was the first private university in India to launch a nano satellite. Describing it as a momentous occasion, the satellite weighing 10.4 kg was designed and developed by about 50 students from various departments over two years.

    The satellite would have a life span of two years and would monitor greenhouse gases, carbon dioxide and water vapour in the atmosphere using a grating spectrometer.

    A separate ground station was set up at the university to monitor the satellite. ''Initially, Isro will monitor the satellite from its ground station at Bangalore. After a week, SRM University will also monitor it from the ground station set up at the campus'', said Narayana Rao, director (research), SRM University.

    He said SRM would continue to work with Isro in future, and would possibly design another satellite in the next two years.
     
  9. RoYaN
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    RoYaN Lt. Colonel ELITE MEMBER

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    20th PSLV lift off successful!!
     
  10. sahil
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    Still recovering from repeated failures of its heavy-lift Geosynchronous Satellite Launch Vehicle (GSLV) in 2010, the Indian Space Research Organization is eyeing the next flight of the vehicle in 2012.
    “We have a major task ahead of us ... [the] development and perfection of [the] indigenous cryogenic stage,” ISRO Chairman K. Radhakrishnan says. “We are making good progress and we plan to have the next flight of GSLV ... in the second quarter of 2012.”
    ISRO also plans to have two more Polar Satellite Launch Vehicle (PSLV) missions before launching the GSLV. On Oct. 12, ISRO successfully launched its PSLV-C18 rocket carrying four satellites, including the Indo-French collaborative weather satellite Megha-Tropiques.
    In December 2010, the homegrown GSLV-F06 vehicle was destroyed by its flight termination system when it veered off course less than a minute after liftoff. The GSAT-5P communications satellite, carrying 24 C-band and 12 extended C-band transponders, plunged into the Bay of Bengal. Before that, the GSLV-D3 mission carrying GSAT-4 failed in April 2010.
    Now under development, GSLV-MK III is designed to make India fully self-reliant in launching heavier communication satellites weighing 4,500-5,000 kg (9,900-11,000 lb.), boosting its status as a key player in the global commercial launch market. According to a senior ISRO official, GSLV-MK III is being designed to place a 4-ton-class satellite into a geostationary transfer orbit.
    S. Ramakrishnan, director of ISRO’s Liquid Propulsion Systems Center, says the agency has identified the issues with the GSLV upper-stage engine. “We have studied the design of booster pumps and redesigned it. The computer simulation was done and validated. One more long-duration test of the cryogenic engine will be made by the end of this month,” he says.
     
  11. Manmohan Yadav
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    Manmohan Yadav Brigadier STAR MEMBER

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    ISRO is the finest Organization in India,
    we salute all the men and women who work there :fans:
     
  12. sanman
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    sanman Lieutenant SENIOR MEMBER

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    Here is an announcement by SpaceX on their "Dragonrider" Lauch-Abort-System(LAS):

    SpaceX Completes Crucial Milestone Toward Launching Astronauts

    India is also working on a Launch-Abort-System for its future manned spaceflight program. I really feel that India should look at the design used by SpaceX and also by Boeing's CST-100, to emulate their superior design instead of the old-style designs of Apollo and Soyuz.

    A pusher design is superior to a tractor model, because of its greater versatility.
     
  13. sanman
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    sanman Lieutenant SENIOR MEMBER

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    1 person likes this.
  14. SajeevJino
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    ISRO is in a race with NASA over putting
    X-ray telescope in space
    Friday, Jan 20, 2012,


    Scientists at Raman Research Institute
    (RRI) are building an X-ray telescope to
    be sent to space to explain the nature of
    black holes.
    A jointly funded project of the RRI and
    the Indian Space Research Organisation
    (ISRO), the X-ray polarimeter experiment
    for astronomical research, affectionately
    called Polix, will study the polarisation of
    X-rays from cosmic sources.
    “We are building the telescope and Isro
    will be building the satellite that will take
    it to space. This would be the first X-ray
    polarisation mission to space. We
    submitted a proposal to ISRO and we
    received the funding. The equipment will
    be ready this year and it will be up to
    ISRO to build the satellite,” said Dr
    Biswajit Paul, principal investigator of
    Polix.
    Paul said the telescope would study how
    a black hole influences the space around
    it and also the magnetic structure of
    neutron stars.
    “There is a lot of important science that
    can be done around black holes. We
    hope to find concrete evidence of some
    of the predictions for the general theory
    of relativity,” said Paul.
    The Gravity and Extreme Magnetism
    Small Explorer (Gems) being developed
    by Nasa is also an X-ray telescope slated
    for launch in 2014. It is similar to Polix.
    “We are competing strongly to launch
    before they do but Gems is much more
    sensitive and our work can be
    complementary to one another. But yes,
    our goal is to launch before they do,” he
    said.
    Polix is more economical than the Gems
    project. “Our instrument has a budget of
    about Rs12 crore to Rs14 crore. It will
    cost about Rs100 crore to launch the
    satellite. The budget for Nasa’s mission
    is about $150 million.
    “We are a small fraction of that and we
    will be able to do a significant amount of
    work that the NASA’s mission will
    accomplish,” he said
     
  15. Steel
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    Steel Lieutenant SENIOR MEMBER

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    where is the link ?:help:
     

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