Chethan Kumar Profile picture
May 20 11 tweets 6 min read
Here We Go: #Exclusive #Thread #Update

With the #Ukraine crisis preventing the use of the preferred AN-124 aircraft, India's #GSAT24 has been shipped to French Guiana for its June 22 launch on @IAF_MCC Globemaster (C-17) aircraft (see pic). 1/n
Most satellites around the world are transported using the AN-124 aircraft which offers loading and unloading options most suitable for sensitive equipment/systems that satellites are made of (see representative pic)… 2/n
…And, as per sources in @NSIL_India, which is launching #GSAT24 as a dedicated satellite for Tata Play’s (formerly TataSky) DTH services, the initial plan was to ship the satellite using an AN-124. 3/n
“Given the geopolitical situation, availability of An-124 was difficult so we decided to use the C-17. However, we’ve had to use two: The first with the satellite and some ground support equipment and the second one carrying other ground support equipment,” an official said. 4/n
The first C-17 Globmaster took off from the @HALHQBLR airport in the wee hours of Thursday, while the second one left a few hours thereafter. 5/n
The GSAT-24 is NSIL’s first dedicated commercial satellite launch mission that is scheduled for June 22 from French Guiana. NSIL is launching the satellite using the services of French firm Arianespace, which will employ its heavy-lift rocket Ariane-5. 6/n
#GSAT24 is a Ku-band 4-tonne class comms sat built by @isro for @NSIL_India. It’ll provide high-quality TV, telecom & broadcasting services over India. It is, as first reported by me, dedicated for Tata Play and the 1st demand driven comm sat mission undertaken by NSIL. 7/n
As part of space reforms announced by GoI, @NSIL_India is mandated to undertake operational sat missions on ‘demand driven’ model, wherein it is responsible for building/procuring, launching, owning and operating the sat besides providing services to its committed customer. 8/n
In line with this, #GSAT24 will be fully funded, owned and operated by NSIL on a commercial basis. Earlier, firms would get annual leases to utilise satellite capacity. In this case, Tata Play would have the transponders for a much longer time. 9/n
As reported earlier by me, Arianespace’s Jun 22 Ariane-5 mission will launch sats for 2 of its major customers — MEASAT (Malaysian satellite operator), and India’s #GSAT24. For MEASAT, it will launch MEASAT-3d , a multi-mission telecom sat built by Airbus Defence & Space. 10/n
The Ariane-5 heavy-lift launcher is an European Space Agency (ESA) programme carried out in co-operation between public institutions and industry. n/n

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More from @Chethan_Dash

May 19
Here we go: #update #thread #Space

@isro, as part of its preparations for India’s first human spaceflight mission — #Gaganyaan — is planning seven integrated air-drop tests (IADTs) of simulated crew modules, which will validate the parachute system. 1/n
While some tests in the run-up to these 7 tests have been completed, IADTs will be crucial before moving ahead to the next phase. The space agency has already completed the preliminary structural design of the crew seat assembly, the IADT structure design of the crew module. 2/n
“For validation of the parachute system, seven IADTs are planned with a simulated crew module, maintaining external configuration similar to flight… 3/n
Read 13 tweets
May 18
#Thread #Space #India #IPR

@isro, which had a relatively quiet year (2021-22) so far as space launches were concerned, had been working on unique, cutting-edge technologies and processes through the year. 25 patents at the rate of 1 every 15 days filed in the said period. 1/n
It also filed 5 new copyrights applications. As on date, @isro has 193 active patents, 73 copyrights and 13 trademarks to its name. Another 96 under examination and 18 are being drafted by lawyers. 2/n
Comparatively, Isro had filed 19 patents and one copyright application in 2020-21. At the end of that fiscal, Isro had 144 active patents, 66 copyrights and 13 trademarks. 3/n
Read 10 tweets
Apr 24
#Update #Thread #Space #Launches

For the first time since its development, India will be using #GSLV class of rockets to launch commercial missions, first of which'll be a @OneWeb constellation. All commercial launches by DoS and its arms so far have been onboard PSLV. 1/n
Now, @NSIL_India has identified #GSLVMk3 for commercial launch of @OneWeb satellites. Sources indicate that the next Mk3 launch could be that of OneWeb, even as another has been identified and is being readied for #Chandrayaan3. 2/n
I was the first to report in October last year about GSLV-Mk3 having inquiries for launching commercial satellites and an impending announcement (see link). 3/n

Read 11 tweets
Apr 22
#UPDATE #Thread #science

Was caught up with something else the last couple of days. Here’s more on Prof Ajay Kumar Sood from @iiscbangalore and his appointment as the new @PrinSciAdvGoI. Prof Sood has succeeded @kvijayraghavan 1/n Image
A Year of Science Chair Prof in the dept of physics, IISc, Sood is renowned for pioneering research in quantum materials and soft condensed matter. The PSA office, established in 1999, aims to provide advice to PM & cabinet on matters related to science, tech & innovation. 2/n
Sood was born on Jun 26, 1951 in Gwalior; did MSc in Physics at Panjab Univ in 1972; PhD in Physics from IISc in 1982. 1973-1988: scientist at Indira Gandhi Centre for Atomic Research with a postdoc sojourn (1983-85) at Max Planck Institute for Solid State Research, Germany. 3/n
Read 9 tweets
Apr 22
#Thread #Astronomy #Stars #UPDATE

An international team of scientists led by #Indian #astronomers has spotted a new member belonging to the extremely rare group of young stars that exhibit what's called episodic accretion. 1/n Image
Episodic accretion is a process where stars accrete via a disk from a more spherically distributed envelope which adds mass to the disk & makes it unstable on an irregular basis. Such instability dumps extra material onto the star & accretion rate & luminosity increase. 2/n
Indian astronomers from the @ARIESNainital as part of an international team, including from @TIFRScience and @IIABengaluru have discovered “Gaia 20eae”, the latest member of episodically accreting young stars, according to @IndiaDST . 3/n
Read 13 tweets
Apr 7
Here’s the first one. #Thread #Satellites #Debris

Exclusive: More than 10yrs after it was launched, #MeghaTropiques, @isro & @CNES joint weather modelling satellite that was studying water cycle & energy exchanges in the tropics has reached what’s called “end of mission”. 1/n
The satellite, which was launched in October 2011 and initially estimated to have a life of five years has worked for five-years-and-six-months more than initial estimations and sent in at least 5TB of raw data which has yielded around 30TB of data sitting on various servers. 2/n
A senior Isro scientist said: “As on date, the satellite still has 120kg of fuel and end of mission is also not because of failures in communication, solar panels or any other systems or because we lost communication. All of those are still working.” 3/n
Read 13 tweets

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