You can search by either selecting keyword only or dates only or with both keyword and dates.
You cannot select "news" previous than 1st March 2016.


Resourcesat-2A joins the observation deck (Relevant for GS Prelims)

Remote sensing satellite Resourcesat-2A was launched from the Satish Dhawan Space Centre in coastal Andhra Pradesh, Sriharikota . It was the only satellite aboard the PSLV-C36 rocket.

Success streak
In 2016, nine missions have taken off successfully from the Satish Dhawan Space Centre, including the more powerful GSLV. For the light-lifting PSLV, it was the 37th straight successful flight.

What is remote sensing satellite?
Remote sensing satellite involves acquisition of information about an object or phenomenon without making physical contact with the object and thus in contrast to on-site observation. Remote sensing uses cameras to capture images, thermo sensors to record tempretarues, etc.

PSLV vs GSLV
1. The PSLV (Polar Satellite Launch Vehicle) and GSLV (Geosynchronous Satellite Launch Vehicle) are two rocket launch systems developed by the Indian Space Research Organization, or ISRO, to launch satellites into orbit. The PSLV is the older of the two and the GSLV even inherits some of the technologies of the former in its design.

2. The main reason behind the advent of the GSLV is the capability to lift greater loads into space. While the PSLV can only lift slightly over a ton of payload to GTO (Geostationary Transfer Orbit), the GSLV is capable of lifting more than double that with a rated capacity of 2 to 2.5 tons.

3. One of the main reasons why the GSLV has such an increased load is its utilization of a cryogenic rocket engine for its last stage. The cryogenic rocket engine provides more thrust than conventional liquid rocket engines but the fuel and oxidizer needs to be super cooled in order to keep them in a liquid state.

4. There is also a difference between the PSLV and GSLV in terms of the rocket itself. The PSLV has 4 stages that alternate between solid and liquid fuels while the GSLV has three stages with the only the first stage having solid fuel.

5. To assist the first stage in lifting the heavy rocket, the PSLV has 6 strap-on solid rockets. Four of these rockets are lit prior to the launch and the rest are fired in the air. 5.  The GSLV also has strap-on rockets but there are only 4 of them and they have liquid fuel. Although the strap-on rockets of the GSLV provide slightly less thrust than those on the PSLV, they burn three times longer and provide greater assistance to the first stage.

6.  When you look at their track records, it is easy to see that the PSLV is more reliable. With 18 launches, 16 of those were successes while only the first one was a total failure; the     remaining one is called a partial failure as the satellite did not reach the intended altitude. The 7 launches of the GSLV have had worse results with 4 ending in failure and only two successes; it also has one partial failure launch.
 



en_USEnglish
hi_INहिन्दी en_USEnglish