Chethan Kumar Profile picture
Jun 12 12 tweets 4 min read Twitter logo Read on Twitter
#Update #thread

The Isro Human Space Flight Centre — #HSFC — which is leading the implementation of #Gaganyaan has a new director, M Mohan, who has taken over ahead of a crucial test mission planned in mid-July or August. 1/n Image
Mohan took charge from Umamaheswaran R, who superannuated on May 31. Mohan’s appointment will not change the composition of #Gaganyaan team as the project director and other positions continue to remain with the same personnel. 2/n
Mohan, from the rocket side, had served as project director Space Capsule Recovery Experiment or #SRE, which Isro carried out in 2007 as a precursor to the human spaceflight mission, more than a decade before Prime Minister Modi announced #Gaganyaan. 3/n
Before becoming director-HSFC, Mohan was associate director at the Vikram Sarabhai Space Centre (VSSC), Isro’s rocket building unit, and before that he was also with liquid propulsion. 4/n
#Gaganyaan is the first of the human spaceflight missions, HSFC is spearheading the mission through co-ordinated efforts and focus all the activities that are carried out in other centres, research labs in India, academia & Industries towards accomplishing the mission. 5/n
According to Isro, as the lead centre for human space flight activities, HSFC will also be responsible for all future human missions Isro plans… 6/n
…To meet this, it will need to conform to high standards of reliability and human safety in undertaking R&D activities in new technology areas like life support systems, human factors engineering, bioastronautics, crew training and human rating & certification. 7/n
“These areas would constitute important components for future sustained human space flight activities like rendezvous and docking, space station building and interplanetary collaborative manned missions to Moon/Mars and near-earth asteroids,” according to Isro. 8/n
Upcoming Abort Mission: The change in HSFC comes at a time Isro is looking to carry out the first abort test using the special test vehicle (TV) designed for the purpose. 9/n
According to Somanath, while the space agency was looking to conduct the test in mid-July, it may now happen in early August, following which the second test will be done in the later part of the year. 10/n
As reported by TOI earlier, the first abort test using TV is expected to see the simulated crew module separate from the vehicle at a height of around 11km (from sea level), attain an altitude of around 15km before falling back to back in the Bay of Bengal. 11/n
The mission — TV technology demonstrator-1 (TV-TD1) mission — will be the first of several such tests Isro plans to conduct before the first uncrewed mission under Gaganyaan. n/n

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More from @Chethan_Dash

May 18
#Thread #Update 

In a key milestone, #Chandrayaan3 project team, which is burning the midnight oil to meet the mid-July window for the launch, has begun the process of final assembly of payloads at the UR Rao Satellite Centre (URSC) in Bengaluru. 1/n Image
@isro has adopted a cautious approach for the mission with chairman S Somanath having categorically directed scientists and engineers working on the project to ensure validation of all technologies, systems and subsystems. 2/n
“The mission progress is on the intended path with most major tests having been completed. Project team is confident of achieving the remaining progress... 3/n
Read 14 tweets
Apr 1
#Thread #Space

@isro, as part of plans to expand its ground station network, plans to build one in French Guiana. According to Isro, “technical discussion on establishing” the stn is on with CNES, ties with whom has expanded beyond EO to include human spaceflight & SSA. 1/n
A senior Isro scientist said: “This will be what we call a gateway station, which will be used to link the proposed Indian Data Relay Satellites (IDRS). We’ve made the proposal and the site has been identified by our partners in France… 2/n
…Acquisition of required permissions & other processes are ongoing. While the first major use case for the stn could be #Gaganyaan, this will have benefits for all future telemetry & tracking ops, monitoring of LV during launches, data downloading data from EO sats etc.” 3/n
Read 13 tweets
Feb 4
#Thread #Space #UPDATE 

@isro has officially said the NASA-Isro SAR (#NISAR), a LEO observatory being jointly developed with @NASA “shall be launched from Indian soil in Q1 of 2024”, and its science operations will begin 90 days after it reaches the intended orbit. 1/n

Pic: JPL
The synthetic aperture radar (SAR) payloads mounted on integrated radar instrument structure (IRIS) and the spacecraft bus are together called an observatory. 2/n
The observatory will map the entire globe in 12 days & provide spatially & temporally consistent data for understanding changes in Earth’s ecosystems, ice mass, vegetation biomass, sea-level rise, groundwater & natural hazards - earthquakes, tsunamis, volcanoes & landslides. 3/n
Read 19 tweets
Jan 27
#Update (2) #Space #Thread

@isro’s latest rocket, #SSLV, is geared for launch with the space agency aiming for an early Feb launch carrying three payloads. While the main payload will be #EOS7, the mission is also expected to launch #Janus1 from US' Antaris & an Indian sat. 1/n
The Earth observation satellite #SSLV is scheduled to carry will be in the small satellite class with its mass not exceeding 200kg, while the other two satellites sharing the ride will be smaller. 2/n
#SSLV can launch around 500kg sat in a 500km planar orbit and its key features — low cost, low turn-around time, flexibility to launch multiple sats, launch-on-demand, minimal infra requirements, etc,. — can make it a go-to LV for commercial launches in the future. 3/n
Read 10 tweets
Jan 26
#Updates #Space #Thread

Had to be away. But here are some developments. More to follow later this evening or early tomorrow.

First, the #RLVTDLEX date will be fixed after the lifting trial is done. Isro will use Chinook as opposed to Mi17 as planned earlier. 1/n Image courtesy: @isro
@isro, which has received a key payload #VELC for #AdityaL1 today, has completed survey and radiation studies at Fiji Islands for a temporary station being designed specifically for the Solar mission, while exploration of other sites is ongoing. 2/n
Fiji Islands is one of the options being explored to support the observatory-class space-based solar mission wherein the spacecraft will be placed in a halo orbit around L1. A final decision on location will be taken later based on the exact mission profile of the mission. 3/n
Read 12 tweets
Dec 9, 2022
#JUSTIN #UPDATE #Thread

@isro completed the first blow down test of the newly installed Trisonic Wind Tunnel at the Vikram Sarabhai Space Centre (VSSC), the space agency’s lead rocket-building agency, on Thursday. 1/n
Trisonic Wind Tunnel is a system to aid aerodynamic design of rockets and re-entry spacecrafts by characterising a scaled model by evaluating forces, moments, load distribution, unsteady pressures, acoustic levels etc. 2/n
Arguing that this is a major step towards India’s increasing self-reliance in the aerospace sector, Isro said: “The tunnel has an overall length of about 160m and has a maximum cross section of 5.4m… 3/n
Read 9 tweets

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