After two setbacks, Isro set to launch five satellites on 12 July

-

After two setbacks this year, India’s space agency is set to launch five satellites on 12 July, including one that can shoot pictures of small objects on land and compress the time needed for building high-resolution maps by half.

Isro had deferred the launch of its workhorse polar satellite launch vehicle (PSLV) scheduled in May after it found leaks in the rocket’s second stage. The leaks were detected when pressurized nitrogen was pumped in the rocket as part of tests on the launch pad.

The same rocket will be fired now, following repairs and further tests, said an Isro official from Sriharikota. He did not want to be named.

“Even if the leak is minor, it takes many days to rectify and certify it fit,” said U.R. Rao, a former chairman of Isro. “In space, you don’t take risks.”

The rocket will also launch Alsat-2A, a remote sensing satellite from Algeria and India’s first African customer, two nano satellites from the University of Toronto, and Studsat, a small satellite built by engineering students in Karnataka and Andhra Pradesh.

Isro’s commercial arm, Antrix Corp. Ltd, has already signed a second satellite launch from Algeria for next year.

So far, PSLV has launched 39 satellites, nearly half of them from India, in 16 missions.

Isro expects Cartosat-2B to join two other satellites that are already in orbit—the Cartosat-2 and 2A—and return more high-resolution images to earth and provide complete coverage of the subcontinent, said S. Satish, director, Isro.

Cartosat-2B has a high resolution of 0.8 metre, allowing it to photograph objects the size of a typical bicycle.

Typically, satellites that can snap high resolution images can cover a small width or swath of 10km. To cover a larger area, a satellite would have to come back to a specific spot repeatedly, which would take a long time as it would have to complete one orbit of the earth to do this. A constellation of three satellites, on the other hand, can cover the entire country.

“It is like a camera; you want sharp images you need to be closer. You can go farther to cover a larger area, but you won’t get minute details,” said Rao.

As for the GSLV, Satish said a panel that’s studying what led to its crash is set to announce its report next week.

Comments

Post a Comment

Popular posts from this blog

Indigenous tank T-90 Bhishma rolls out

-
Image
The first batch of the indigenously built T-90 Bhishma tanks was on Monday (August 24) flagged off by Minister of State for Defence MM Pallam Raju at the rolling out ceremony held at the Heavy Vehicles Factory, Avadi, in Chennai. The T-90S tank incorporates many new technologies in terms of mobility, protection, fighting capabilities, safety and communication. The tank is equipped with 125mm smooth bore gun stabilised in Elevation and Azimuth, 12.7mm anti-craft machine gun and 7.62mm co-axial machine gun supported with high accuracy sighting systems and Automatic Loader ensuring high rate of fire. A significant feature of this tank is its capability to fire guided missile in addition to conventional ammunition using the same main gun barrel. The integrated fire control system consisting of the gunner’s sight, guided weapon system and ballistic computer facilitates accurate firing of conventional ammunitions as well as the guided missiles. The built in Explosive Reactive Arm
Read more

Second only to US IAF & Navy to get DRDO's CHAFF tech for protecting Aircrafts and Ships from enemy missile

-
Image
The Indian Air Force and Navy have partnered with the Defence Research and Development Organisation to acquire the CHAFF technology, which protects warships from anti-ship missiles during combat. After the United States, India is now the second country to develop this capability, signalling a major Aatmanirbhar push in the field of defence. The development is significant because the Indian navy is investigating the sinking of the Russian missile cruiser Moskva and concentrating on how to protect our warships from anti-ship ballistic missiles such as the Chinese DF-21. What exactly is CHAFF? CHAFF is a critical defence technology that protects fighter planes and naval ships from enemy radar-guided missiles during wartime. The importance of this technology stems from the fact that a small amount of CHAFF material deployed in the air acts as a decoy to deflect enemy missiles, ensuring the safety of fighter planes and naval ships. This advanced CHAFF technology was developed by the DRDO to
Read more

India built N-sub in Kalpakkam under codename 'PRP'

-
The secrecy attached to the development of the indigenous nuclear submarine project is almost legendary. What’s little known is the extent to which the Indian N-establishment went to conceal the research not only from the public but also large sections of the scientific community within the Department of Atomic Energy (DAE). For almost nine years, most staff working at the Indira Gandhi Centre for Atomic Research (IGCAR) in Kalpakkam believed the Plutonium Recycle Project (PRP) in the complex was used only for that purpose, that is recycling plutonium. But with the launch of INS Arihant on July 25, top DAE officials have finally begun to lift the veil and reveal that they were actually building the core (nuclear reactor and propulsion systems) of the submarine as well as the land-based version of the hull of the indigenous vessel, which served as the technology demonstrator of the main vessel, within the PRP unit. For those in the know, even the term ‘PRP’ denoted the N-sub.
Read more