Chethan Kumar Profile picture
Jan 26 12 tweets 5 min read
#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
According to Isro, a satellite around L1 point has the major advantage of continuously viewing the Sun without occultation/eclipses as the position provides a greater advantage of observing solar activities continuously. 4/n
#AdityaL1 will carry 7 payloads to observe photosphere, chromosphere, & outermost layers of Sun (the corona) using electromagnetic & particle detectors. While 4 payloads directly view Sun from L1, the remaining carry out in-situ studies of particles and fields at L1. 5/n
Aside from the station for #AdityaL1, Isro is planning, as part of a larger plan, expansion of its tracking network. At present, aside from its own stations spread across India and other parts of the world, Isro uses transportable tracking terminals for key missions. 6/n
Usually, these are converted into ship-borne stations, but Isro had built a temporary station for one of its #Risat missions and the one for Aditya too will be on land. Also, a similar station will come up in Australia for #Gaganyaan as I’d reported earlier. 7/n
Isro has three transportable terminals at present and will be building more of these soon. #ISTRAC in Bengaluru, is responsible for this network of tracking stations. 8/n
Its director BN Ramakrishna told me: “Recommendations for a site in Fiji have come, a similar process for other sites will be carried out. For Gaganyaan, our team will visit and give a similar report before we decide on the location.” 9/n
As I’d reported earlier, the terminal in Aus is expected on Cocos (Keeling) Islands, as part of space co-operation. Ramakrishna added Isro may be looking at a permanent station too given its geographical advantage & necessity in that region for tracking and monitoring. 10/n
#Gaganyaan: Isro, which is indigenously developing #ECLSS has begun work on an exclusive facility in Devanahalli — near the Isro guest house — near Bengaluru, where work on the new technology will shift completely. 11/n
“On Jan 18, the ground-breaking for the new facility was done and it should be ready in the next 10 months or so or maybe by the end of the year. However, the work on ECLSS has been happening and will continue to happen,” an Isro official from the headquarters said. n/n

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More from @Chethan_Dash

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 Image
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
Dec 9, 2022

@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
Dec 7, 2022
#Thread #Space #India

In line with its renewed mandate to hand hold and encourage private industry, @isro and @SocialAlphaIN have launched a new innovation platform for the space sector: SpaceTech Innovation Network or #SpIN. 1/n Image
This is India’s first dedicated platform for innovation curation & venture development for space entrepreneurial ecosystem. 2/n
“A one-of-its-kind public-pvt collaboration for space startups, SMEs, #SpIN is a step in providing stimulus to India’s space reform policies & will work towards identifying & unleashing mkt potential of most promising space tech innovators & entrepreneurs,” Isro said. 3/n
Read 10 tweets
Nov 28, 2022
#Breaking #Stars #Galaxies #Thread

Today, @RRI_Bangalore (in pic) said in a first-of-its-kind work, using data from an Indian telescope, scientists have determined properties of radio luminous galaxies formed just 200-mn yrs after #BigBang — a period known as #CosmicDawn. 1/n
Pointing out that telescopes, both ground and space-based, are aiming to capture faint signals from the depths of the cosmos to better the understanding of our Universe, RRI said they used the Shaped Antenna measurement of the background RAdio Spectrum-3 (#SARAS3) telescope. 2/n
For the study, SARAS-3, indigenously designed and built at RRI, was deployed over Dandiganahalli Lake and Sharavathi backwaters, located in Karnataka, in early 2020 (see pic). 3/n
Read 23 tweets
Nov 28, 2022
#JUSTIN #Thread #Space

Space-tech start-up @AgnikulCosmos today said it has established India’s first launchpad designed and operated by a private player. The facility, situated at Sriharikota, was inaugurated by Isro chairman S Somanath on Nov 25. 1/n
The facility which was designed by Agnikul and executed with support from Isro and Indian National Space Promotion and Authorization Center (IN-SPACe) has two sections to it — the Agnikul launchpad (ALP) and the Agnikul mission control centre (AMCC). 2/n
“Critical systems connecting these two sections, which are 4km away from each other are redundant to ensure 100% operationality during countdown… 3/n
Read 14 tweets
Nov 25, 2022
#Update Been under the weather the last couple of days. Another weekend, another key launch. A 3-in-1 mission for @isro on Nov 26: #PSLVC54 to launch 7 commercial, one diplomatic & 1 main national satellites. 

#Thread to put things in one place, I may not be around tomorrow: 1/n
Last Friday, a private single-stage rocket became the first non-Isro launch vehicle to ever enter the space agency’s spaceport in Sriharikota, which already boasts of 620 launch missions, including sounding rockets (see image/doesn’t include #VikramS). 2/n
This Saturday, the main payload is a satellite for national objectives designed and developed for ocean studies, the Oceansat-3 or Earth observation Satellite-06 (EOS-06). This is part of a series of satellites from Isro dedicated to oceanography and atmospheric studies. 3/n
Read 10 tweets

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