Thursday April 9, 2020
Home India ISRO upbeat a...

ISRO upbeat after successful launch of six Singaporean satellites

0
//

Sriharikota: India on Wednesday successfully launched six Singaporean satellites. As the Indian space agency achieved the milestone of its 50th rocket launch from here, its chief said they are now looking at the way forward and have a lot more to achieve.

The Polar Satellite Launch Vehicle’s core alone (PSLV-CA) variant — standing 44.4 metres tall and weighing around 227 tonnes — took off from the Sriharikota rocket port in Andhra Pradesh, around 80 km from Chennai. It rose into the evening skies, riding majestically on the tail of fierce orange flames.

Expressing satisfaction at ISRO’s performance in 2015, the space agency’s chairman A S Kiran Kumar said it was now way forward to 2016.

ISRO will carry on the activity of putting satellites — both communication and earth observation variants — into orbit, he said.

“We have a lot more to achieve next year,” he said.

Another official said with Wednesday’s successful blast-off, ISRO also achieved the milestone of its 50th rocket launch out of Sriharikota.

Besides launching the six Singaporean satellites, ISRO also tested the rocket’s fourth stage/engine’s ability to restart after it was cut off around 17 minutes into the flight.

Technically speaking, India was testing a multiple burn fuel stage/rocket engine for the first time.

“The restart and shut off of the fourth stage engine is done as a first step towards launching multiple satellites but in different orbits,” an ISRO official told IANS, declining to be named.

Launching multiple satellites with a single rocket is nothing new for ISRO and it has been doing that for several years now. The challenge is, however, to put several satellites into different orbits with one rocket.

This is what ISRO plans to test when the PSLV-CA ejects the six Singaporean satellites.

The PSLV rocket is a four-stage/engine rocket powered by solid and liquid fuel alternatively.

“Restarting a rocket engine soon after it is shut off is a critical technology that has to be mastered. Once a rocket engine is activated, then the heat generated is very high. The trick is to cool it down in space and to restart it after a short gap,” an industry expert said.

“This is entirely different from switching on and off the communication satellite’s engines in space. The interval between two restarts of a communication satellite engine will be in days. But in the case of restarting a rocket engine, the time gap will be in hours,” the expert added.

“By that time, the rocket’s engine has to be cooled down. This part of the experiment is very critical,” he explained.

The PSLV’s fourth stage/engine will be restarted just over 67 minutes into the flight or 50 minutes after the engine was cut off.

At the time of restart, the fourth stage will be in a lower altitude of 523.9 km while the satellites would have been ejected at 550 km altitude.

The engine will be operated for four seconds and is planned to go up to an altitude of 524 km before it is cut off again.

In December 16 blast-off, ISRO is using the ‘core alone’ variant of the PSLV rocket. The rocket did not have the strap-on boosters, its standard feature.

With the successful launch of the six Singaporean satellites, ISRO has put a total of 57 foreign satellites into space.

Out of the six satellites, the 400 kg earth observation satellite called TeLEOS-1 is the main passenger for the PSLV rocket and hence the mission is called TeLEOS mission by ISRO.

TeLEOS-1 is Singapore’s first commercial earth observation satellite designed and developed by ST Electronics.

The other five co-passenger satellites are VELOX-C1 (123 kg), VELOX-II (13 kg), Kent Ridge-1 (78 kg), Galassia (3.4 kg) and Athenoxat-1.

The December 16 mission is the last launch mission for ISRO in 2015.

So far in 2015, ISRO has launched 14 satellites (three Indian and 11 foreign) from its rocket port in Sriharikota. Thirteen satellites were launched with PSLV rocket and one communication satellite — GSAT-6 — with geosynchronous satellite launch vehicle (GSLV).

Last month, India also launched its communication satellite GSAT-15 using the Ariane rocket of the European space agency which takes the total number of satellite launches in 2015 to 21 (17 foreign, four Indian).(IANS, Image: thecampusconnect)

Next Story

Xiaomi Unveils New “Redmi Note 9 Series” Smartphones With ISRO’s Navigation “NavIC” in India

Both the devices will be available across all offline partner stores soon

0
Redmi
The Redmi Note 9 Pro Max houses a quad-camera setup with a combination of 64MP primary lens, 8MP ultra wide-angle lens, 5MP macro sensor and 2MP depth sensor. For the front, there is a 32-megapixel in-display selfie shooter. IANS

 Chinese smartphone manufacturer Xiaomi on Thursday launched ninth generation of the Redmi Note series smartphones Note 9 Pro Max and Note 9 Pro with support for ISRO’s indigenously developed navigation system, NavIC in India.

“Redmi Note 9 Pro series is built for true Mi Fans and we hope they would appreciate this perfect amalgamation of Aura design, Pro Cameras and Max Performance as we continue to bring the best specs with highest quality at honest pricing,” Anuj Sharma, Chief Marketing Officer, Xiaomi India said in a statement.

Redmi Note 9 Pro Max will be available in three colour variants, interstellar black, aurora blue and glacier white in 6GB + 64GB, 6GB + 128GB and 8GB + 128GB storage variants for Rs 14,999, Rs 16,999 and Rs 18,999 respectively across mi.com, Amazon India, Mi Homes and Mi Studios starting March 25.

Meanwhile, Redmi Note 9 Pro will be available in same three colour variants in 4GB + 64GB and 6GB + 128GB storage variants for Rs 12,999 and Rs 15,999 respectively starting March 17.

Both the devices will be available across all offline partner stores soon.

In terms of specifications, both the smartphones feature a 6.67-inch Full HD+ display with a screen resolution of 2400 x 1080 pixels along with triple Corning Gorilla Glass 5 protection.

Both the phones are powered by the latest Qualcomm Snapdragon 720G processor along with Adreno 618 GPU.

The Redmi Note 9 Pro Max houses a quad-camera setup with a combination of 64MP primary lens, 8MP ultra wide-angle lens, 5MP macro sensor and 2MP depth sensor. For the front, there is a 32-megapixel in-display selfie shooter.

Redmi
Chinese smartphone manufacturer Xiaomi on Thursday launched ninth generation of the Redmi Note series smartphones Note 9 Pro Max and Note 9 Pro with support for ISRO’s indigenously developed navigation system, NavIC in India. Wikimedia Commons

The Redmi Note 9 Pro also comes with a quad-camera setup with a combination of 48MP primary lens, 8MP ultra wide-angle lens, 5MP macro sensor and 2MP depth sensor. For the front, there is a 16MP in-display selfie shooter.

Both smartphones run on Android 10 with MIUI 11.

ALSO READ: Facebook Starts Sending Invites To Beta Testers For its Upcoming Social VR App “Horizons”

Additionally, the phones are backed by a 5020mAh battery. The Redmi Note 9 Pro Max comes with 33W fast charging support, while the Redmi Note 9 Pro comes with 18W fast charging support. (IANS)