On July 12, 2010, at 9:22 a.m., Indian Space Research Organization (ISRO), from its Satish Dhawan space center near Sriharikota, successfully launched PSLV-C15 rocket carrying five satellites- CARTOSAT-2B, ALSAT-2A, NLS 6.1 & 6.2 and STUDSAT.
Out of these five satellites, there were three third party satellites- Algerian remote sensing satellite Alsat-2A (116 kg) and two nano satellites - NLS 6.1 AISSAT-1 and NLS 6.2 TISAT. The NLS 6.1 AISSAT-1 weighs 6.5 kg and is built by
Till date, ISRO successfully launched 25 satellites. ISRO has been carrying out multiple launches for the last several years and set a new record in 2008 by launching ten satellites at one go.
ISRO has been successfully launching satellites in polar sun synchronous, geosynchronous transfer orbit, and highly elliptical and low earth orbits.
In 1999, ISRO PSLV rockets started carrying third party satellites along with ISRO’s satellite to earn some revenue. That year it launched the 110 kg South Korean Kistsat-3 and the 45 kg DLR-Tubsat of
Over the years, ISRO designed its ‘core alone’ version of PSLV. However, the PSLV rockets’ maximum carrying capacity is around 1,750 kg. So, ISRO developed another rocket Geosynchronous Satellite Launch Vehicle (GSLV) which can carry more than two tones because heavier pay load brings in more money.