Annadurai takes over as Director of ISRO Satellite Centre

Annadurai takes over as Director of ISRO Satellite Centre

M Annadurai, senior scientist and programme director, Indian Remote Sensing Satellites (IRS) and Small Satellite Systems (SSS) of ISRO Satellite Centre (ISAC), Bengaluru, has assumed the office of Director, ISAC on April 1.

He took over as Director, ISAC from S K Shivakumar, who superannuated on March 31, 2015. Annadurai, born on July 2, 1958, graduated in Electronics and Communication Engineering from Government College of Technology, Coimbatore, obtained his Post Graduate degree in Applied Electronics from PSG College of Technology, Coimbatore and Doctoral degree from Anna University, Coimbatore.

PSLV-C27 Successfully Launches India's Fourth Navigation Satellite IRNSS-1D

PSLV-C27 Successfully Launches India's Fourth Navigation Satellite IRNSS-1D

ISRO's Polar Satellite Launch Vehicle, PSLV-C27, successfully launched the 1425 kg IRNSS-1D, the fourth satellite in the Indian Regional Navigation Satellite System (IRNSS) today evening (March 28, 2015) from Satish Dhawan Space Centre SHAR, Sriharikota. This is the twenty eighth consecutively successful mission of the PSLV. The 'XL' configuration of PSLV was used for this mission. Previously, the same configuration of the vehicle was successfully used seven times.

After the PSLV-C27 lift-off at 1719 hrs IST from the Second Launch Pad with the ignition of the first stage, the subsequent important flight events, namely, strap-on ignitions and separations, first stage separation, second stage ignition, heat-shield separation, second stage separation, third stage ignition and separation, fourth stage ignition and satellite injection, took place as planned. After a flight of about 19 minutes 25 seconds, IRNSS-1D Satellite was injected to an elliptical orbit  of  282.52 km X 20,644 km (very close to the intended orbit) and successfully separated  from the PSLV fourth stage.

Hows´ & Whys´ of PISAT satellite: Keplarian Approach

Hows´ & Whys´ of PISAT satellite
Keplarian Approach


    PISat is a student satellite developed by CORI of PESIT,Bangalore,India. It is a nanosatellite which measures 254 x 256x 181 mm and weighs about 5.3Kg. The payload in this satellite is imaging system which works in visible region. Band of operation is S-band :uplink frequency is 2030MHz and downlink frequency is 2240MHz. The modulation scheme employed in uplink is FSK/FM and mod-ulation scheme employed in downlink is BPSK. Satellite will orbit at the height of 630km in sun- synchronous orbit with the inclination of 97.86 degree.


Figure 1: Position of PISAT

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