Chethan Kumar Profile picture
Feb 3 12 tweets 6 min read
More #Space Updates: @isro , which has a packed 2022 has made considerable progress on #Chandrayaan3. With many related hardware and special tests successfully completed, the team is moving closer to integrated testing. Launch targeted this year. Maybe August. #Thread
@isro chairman S Somanath told me late last month: “Chandrayaan-3 has been going through a series of reviews, improvements, and strengthening. Some of these are based on the issues we’ve seen earlier....
...But the issues we’ve learnt so far may not be the only ones. The questions are many and we need to foresee a lot of them which may further require corrections. The hardware is under realisation too.”
While Somanath is expected to conduct a formal review later this month, @DrJitendraSingh has said that based on learnings from Chandrayaan2 and suggestions made by national level experts, #Chandrayaan3 realisation is in progress. “The launch is scheduled for August 2022.”
According to more than one scientist associated with the project, testing and fabrication of the lander and other systems that will be part of #Chandrayaan3 is ongoing at various Isro centres while design changes have been nearly finalised.
@isro conceived #Chandrayaan3 after it failed to soft-land CY2's Vikram on Moon while it still has a fully operational orbiter going around. Initially planned for late 2020 or 2021, the department of space (DoS), owing to #COVID19 and other reasons is yet to launch it.
“...Because we need a specific launch window, we need to work towards a deadline, failing which it will have to move to the next year. But the top management is very clear that all steps in the process will be complete before we actually launch the mission,” a source said.
In his New Year message on January 3, then Isro chairman K Sivan had said: “Chandrayaan-3 design changes incorporating and testing has seen huge progress. The mission could be launched by the middle of the year.”
As reported first by me, #Chandrayaan3 will see major design changes compared to the previous mission, key among which is the decision to drop the fifth engine, which was added last minute on Vikram (Chandrayaan-2’s lander).
The lander for this mission will have only four engines, while the overseeing committee has also suggested a minor modification on the legs on the lander, inclusion of the laser doppler velocimeter (LDV) for better measurement of speed during landing, among other things.
The modifications being proposed on #Chandrayaan3 — which were indicators of shortcomings in #Chandrayaan2 — also include changes in software and algorithms, strengthening of the legs, and better power and communication systems.
That #Budget2022, among other things has listed one mission of #GSLVMk3 is also seen as reasons for optimism so far as #Chandrayaan3 is concerned.

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More from @Chethan_Dash

Feb 3
#JUSTIN | Indian Institute of Science @iiscbangalore says it has installed and commissioned Param Pravega, one of the most powerful supercomputers in the country, and the largest in an Indian academic institution as part of the National Supercomputing Mission (NSM). 1/n
The system, which is expected to power diverse research and educational pursuits, has a total supercomputing capacity of 3.3 petaflops (1 petaflop equals a quadrillion or 1,015 operations per second). 2/n
It has been designed by the @cdacindia. A majority of the components used have been manufactured and assembled within India, along with an indigenous software stack developed by C-DAC, a statement issued by IISc reads.
Read 11 tweets
Feb 3
Two #Gaganyaan crew abort tests & #Aditya top priority this yr. @isro will look to launch a relay sat too. Dept of Space, which got Rs 13.7k-cr in Budget has outcome targets for sat launches: 5 PSLV, 2 GSLV, 2 SSLV. #Thread

Story: toi.in/VHeJFZ48/a24gj
@isro working towards carrying out at least 2 test missions to establish crew abort and escape systems using the specially designed test vehicle this yr; 1st uncrewed mission expected early next year. Isro will also look to launch the 1st relay satellites for the mission
Somanath on special test vehicle: “Whenever a new agency develops a human-rated space capability, they go through various tests for building such capability. Before the human-rated vehicle flies we have to fly the critical aspects of this techn in a low-cost option..."
Read 15 tweets
Feb 1
Scientists from SAC and PRL recently demonstrated quantum entanglement based real time Quantum Key Distribution (QKD) over 300m atmospheric channel along with quantum-secure text, image transmission and quantum-assisted two-way video calling. @isro
The demonstration was conducted at SAC between 2 buildings 300m apart. This experiment & demonstration were repeated over several nights for repeatability and robustness of indigenously developed QKD system that can seamlessly generate, utilise secure keys for various apps.
@isro: Various images were encrypted using a generated quantum key and transmitted over a classical channel from one building to another building separated by 300m and decrypted at the receiving terminal in real time.
Read 9 tweets
Apr 28, 2021
1/n: While our colleagues have been reporting about families struggling and overwhelmed crematoria, forcing staff to work multiple shifts, I'd been trying to get numbers to see what this means. Here: For every Covid-19 death reported in B'luru, at least 2 bodies are cremated.
2/n: Long queues of ambulances and hearses outside crematoria, prima facie, appeared as a logistics issue but data from 12 dedicated crematoria collated between Mar 1&Apr 26 shows: For every Covid-19 death reported in Bengaluru, at least 2 bodies are being cremated.
3/n: Sample this: Crematoria staff from these places have cremated 3,104 bodies under Covid protocol in 57 days, while official number of deaths was only 1,422. The govt is yet to report deaths of 1,682 patients, which makes the gap in reporting and cremations more than double.
Read 12 tweets
May 23, 2020
1/n No amount of appreciation will be enough for the kind of work 3 fantastic photojournalists — Asif, Sunil and @chethan18 — have been doing for @TOIBengaluru. In this series of photos, I hope to celebrate their work. You are free to caption. I'm posting just 1 in each tweet.
2/n No amount of appreciation will be enough for the kind of work 3 fantastic photojournalists — Asif, Sunil and @chethan18 — have been doing for @TOIBengaluru. In this series of photos, I hope to celebrate their work. You are free to caption. I'm posting just 1 in each tweet.
3/n No amount of appreciation will be enough for the kind of work 3 fantastic photojournalists — Asif, Sunil and @chethan18 — have been doing for @TOIBengaluru. In this series of photos, I hope to celebrate their work. You are free to caption. I'm posting just 1 in each tweet.
Read 15 tweets

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