HEADLINES:
IAF already has an order for 22 Apache Attack Helicopters with Boeing । Apaches for the Army are to have the same configuration । There will no more field and firing trials । Army has projected a requirement of 39 helicopters । MoD sanctions combat helicopters for the Army for the first time । Six Apache AH 64E to be given to the Indian Army as a beginning । India Marks 70th Anniversary of Independence Day August 15 । India Strategic Congratulates All Indians Everywhere । HAL Successfully Installs Israeli AESA Radar on a Jaguar aircraft । IAF Bases at Pathankot and Jorhat Upgrading Infrastructure to Receive Boeing Apache Attack Helicopters in 2018 । Dinesh Keskar, Boeing Sr VP Sales for India and Asia Pacific for Civil Aviation, says the region will account for 40% of aircraft sales । China will be the biggest market and India after that । India remembers its heroic martyrs on Kargil Vijay Diwas July 26 । Ram Nath Kovind sworn-in as 14th President and Supreme Commander of the Indian Armed Forces । Iraq Foreign Minister Dr Ibrahim al-Jaafari visits India July 24-28 । He called on Vice President Hamid Ansari, EAM Sushma Swaraj and discussed host of bilateral issues । Indian NSA Ajit Doval visits China to take part in BRICS NSA meet । Indian NSA’s visit comes amid India-China Dokalam stand-off । G20 should collectively oppose terrorism financing, franchises, safe havens, support and sponsors: PM Modi at Informal BRICS leaders meeting in Hamburg, Germany । He appreciated momentum in BRICS under the Chairmanship of President Xi and extended full cooperation and best wishes for the BRICS Xiamen Summit in Sep, 2017 । President Xi appreciated India’s strong resolve against terrorism । The Chinese President also appreciated India’s success in economic and social development and wished India even bigger success । US lifts personal electronics ban on Emirates, Etihad and Qatar airlines । Passengers on these three carriers can now carry their laptops and tablets along with them for flights to all destinations in the US । India, Israel sign 7 agreements including on space technology, agriculture and water conservation । Prime Minister Narendra Modi arrives in Tel Aviv for his 3-day visit to Israel from July 4-6 । The visit, termed as ‘historic,’ is the first ever by an Indian PM to Israel । Israeli PM Netanyahu breaks protocol to receive PM Modi at the airport and accompany him on his engagements । PM Modi visits Holocaust Memorial Museum at Yad Vashem । PM Modi’s visit comes at a time when the two nations are celebrating the establishment of 25 years of their diplomatic relations । Happy 4th of July to all our friends in the U.S । India launches communication satellite GSAT-17 June 29 । GSAT-17 was launched using European Ariane 5 launch vehicle from Kourou, French Guiana । Government gives ‘in principle’ approval for disinvestment of Air India, 5 of its subsidiaries । Prime Minister Modi-headed CCEA gave its approval to fourth tranche recommendations of NITI Aayog on strategic disinvestment of CPSE June 28 । Possible sale of one more Boeing C-17 aircraft to India approved – Pentagon।brating 70 years of Diplomatic Relationship ।
August 20, 2017
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ISRO Achieves Another Milestone

PSLV-C35 SUCCESSFULLY LAUNCHES EIGHT SATELLITES INTO TWO DIFFERENT ORBITS IN A SINGLE FLIGHT
Published: October 2016
 

New Delhi. In its thirty seventh flight (PSLV-C35), ISRO’s Polar Satellite Launch Vehicle successfully launched the 371 kg SCATSAT-1 Satellite along with seven co-passenger satellites

September 26 from Satish Dhawan Space Centre SHAR, Sriharikota. This is the thirty sixth consecutively successful mission of PSLV. The total weight of all the eight satellites carried on-board PSLV-C35 was 675 kg. PSLV-C35 is the first PSLV mission to launch satellites carried onboard into two different orbits. This PSLV mission was the longest of the PSLV missions conducted till date and was completed in 2 hours 15 minutes and 33 seconds after lift-off.

After PSLV-C35 lift-off at 0912 hrs (9:12am) IST from the First Launch Pad with the ignition of the first stage, the subsequent important flight events, namely, strapon ignitions and separations, first stage separation, second stage ignition, payload fairing separation, second stage separation, third stage ignition and separation, fourth stage ignition and cut-off, took place as planned. After a flight of 16 minutes 56 seconds, the vehicle achieved a polar Sun Synchronous Orbit of 724 km inclined at an angle of 98.1 degree to the equator (very close to the intended orbit) and 37 seconds later the primary satellite SCATSAT-1 was separated from the PSLV fourth stage.

After separation, the two solar arrays of SCATSAT-1 satellite were deployed automatically and ISRO’s Telemetry, Tracking and Command Network (ISTRAC) at Bangalore took over the control of the satellite. In the coming days, the satellite will be brought to its final operational configuration following which it will begin to provide weather related services using its scatterometer payload. The data sent by SCATSAT-1 satellite will help provide weather forecasting services to user communities through the generation of wind vector products as well as cyclone detection and tracking.

After the successful separation of SCATSAT-1, the PSLV-C35 mission continued. Still carrying the seven copassenger satellites, the fourth stage of PSLV coasted over the South Polar Region

and then started ascending towards the Northern hemisphere. A safe distance between the orbiting SCATSAT-1 and PSLV-C35 fourth stage was maintained by suitably manoeuvring the stage.

At 1 hour 22 minutes and 38 seconds after lift-off as the fourth stage was in the North Polar region, the two engines of PSLV fourth stage were reignited and fired for 20 seconds. As a result of this, it entered into an elliptical orbit measuring 725 km on one side of the Earth and 670 km on the other.

And 50 minutes later, as the PSLV fourth stage was again coasting near the south pole, its engines were fired for another 20 seconds. This second firing made the fourth stage to enter into a circular orbit of 669 km height inclined at an angle of 98.2 degree to the equator.

37 seconds later, the Dual Launch Adapter was successfully separated from the PSLV-C35 fourth stage. 30 seconds after this event, ALSAT-1 was the first co-passenger satellite to be separated successfully. Following this, the NLS-19, PRATHAM, PISAT, ALSAT-1B, ALSAT-2B,

and Pathfinder-1 were separated from the PSLV fourth stage in a predetermined sequence thereby successfully completing PSLV-C35 mission.

Of the seven co-passenger satellites carried by PSLV-C35, two – PRATHAM weighing 10 kg and PISAT weighing 5.25 kg – are University/Academic institute satellites and were built with the

involvement of students from IIT-Bombay and PES University, Bangalore and its consortium, respectively.

The remaining five co-passenger satellites were international customer satellites from Algeria (three – ALSAT-1B, ALSAT-2B and ALSAT-1N), Canada (one- NLS-19) and the United States (one – Pathfinder-1).

With this launch, the PSLV’s capability to launch satellites into two different orbits has been successfully demonstrated. The total number of satellites launched by India’s workhorse launch vehicle PSLV has now reached 121, of which 42 are Indian and the remaining 79 are from abroad.

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