India's one more eye in sky, radar imaging satellite and 9 foreign sats

India on Saturday successfully placed into orbit one more eye in the sky -- a radar imaging earth observation satellite EOS-01 (formerly RISAT-2BR2) -- and nine other foreign satellites in a textbook style.

Sriharikota (Andhra Pradesh): India's new earth observation satellite up in the sky will send good clarity images which will be used for agriculture, forestry and disaster management support, said Indian Space Research Organisation (ISRO), the country's space agency.

The images captured by the satellite will also be used for surveillance purposes while ISRO is silent on this aspect.

The EOS-01 with synthetic aperture radar (SAR) can shoot pictures in all weather conditions.

The satellite can take pictures day and night and will be useful for surveillance as well as civilian activities.

At 3.12 p.m the PSLV-C49 rocket, with lift-off weight of 259 ton and standing around 44.4 metres tall with a one-way ticket hurtled itself towards the skies ferrying the EOS-01, which is a 630 kg earth observation satellite.

ISRO shared a picture of mission, EOS01 successfully separated from the fourth stage of PSLVC49 and injected into orbit.

Piggybacking on that were the nine foreign satellites from Lithuania (1-R2, technology demonstrator), Luxembourg (4 maritime application satellites by Kleos Space) and the US (4-Lemur multi-mission remote sensing satellites).

• With the fierce orange flame at its tail, the rocket slowly gathered speed and went up while the rocket's engine noise like a rolling thunder adding to the thrill.
• At 3.31 p.m. the rocket ejected EOS-01, followed by the nine other foreign satellites.
• Cumulatively till date ISRO has put into orbit 328 foreign satellites all for a fee.
• The PSLV in normal configuration is a four-stage/engine expendable rocket powered by solid and liquid fuels alternatively with six booster motors strapped on to the first stage to give higher thrust during the initial flight moments.
• But the 44.4-metre tall PSLV rocket that flew on Saturday was the DL variant having only two strap-booster motors.
• This rocket variant was used the first time to put the Microsat R satellite into orbit on January 24, 2019.
• The Indian space agency has PSLV variants with two and four strap-on motors, larger PSLV-XL and the Core Alone variant without any strap-on motors.
• The choice of the rocket to be used for a mission depends on the weight of the satellite and the orbit where the satellite has to be orbited.

"Today extremely happy to declare the PSLV-C49 successfully placed EOS-01 and nine customer satellites in 575 km orbit. The solar panels of EOS-01 got deployed," K.Sivan, ISRO Chairman said post-launch.

Sivan said the rocket mission is special and unusual for ISRO. The space activity cannot be done working from home as people have to be in labs, office during the launch campaign.

People have to travel from different centres and work at Satish Dhawan Space Centre (SDSC) here, he said.

"Team ISRO rose to the occasion, worked with limited staff, safely without compromising on the quality," Sivan said complimenting all the Directors of various ISRO Centres.

Speaking about the upcoming missions, Sivan said the next rocket to fly will be PSLV-C50 with CMS-01 satellite (formerly GSAT-12R).

It will be followed by the new small rocket Small Satellite Launch Vehicle (SSLV) carrying EOS-02 and Geosynchronous Satellite Launch Vehicle-F10 (GSLV) carrying EOS-3.

"We are targeting PSLV-C50 sometime in December. It needs about 30 days to get ready for another launch after one launch," S.Somanath, Director, Vikram Sarabhai Space Centre (VSSC) had told earlier.

The other Indian satellites that are ready for launch are GISAT and Microsat-2A.

The launch of the GISAT-1 satellite slated for March 5 this year was postponed due to technical reasons a day before the launch.

"The GISAT-1 satellite will be carried by a GSLV rocket. The GSLV rocket was dismantled after the launch was called off. The rocket is being refurbished. The rocket's cryogenic engine has been brought down and it is being readied again," Somanath had said.

According to him, the GSLV carrying GISAT-1 is expected to fly after PSLV C50.

Now it is official. The Indian space agency has decided to go generic in naming its communication satellites as well after earth observation satellites (EOS).

The acronym CMS stands for Communication Satellite and the 01 tagged to it is the serial number.

As per plans, ISRO will launch the GSAT-12R satellite using the PSLV-C50.

Sivan said the PSLV-C50 rocket will be followed by the launch of new small rocket Small Satellite Launch Vehicle (SSLV) carrying EOS-02, and Geosynchronous Satellite Launch Vehicle-F10 (GSLV) carrying EOS-3.

(Inputs from IANS)