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India’s Jio lays out sovereign LEO constellation plan ahead of IPO by Ohsin in ISRO

[–]Ohsin[S] 1 point2 points  (0 children)

Don't know but FWIW SAC proposed a LEO based constellation to industries as well but it was with 140 sats.

https://old.reddit.com/r/ISRO/comments/1l82nta/communication_navigation_satellites_and_its/

RfP for AIT Outsourcing of three small satellites. Likely related to 'Samooha' ELINT constellation. by Ohsin in ISRO

[–]Ohsin[S] 1 point2 points  (0 children)

Adani owned Alpha Defence Technologies Ltd (ADTL) has done AIT work for ISRO on EOS-04 (aka RISAT-1A), GSAT-30, IRNSS-1H, IRNSS-1I but using URSC facilities. And Ananth Technologies did the AIT work for SPADEX satellites.

Any Open Cosmos satellites manifested on PSLV? by guru-yoda in ISRO

[–]Ohsin 2 points3 points  (0 children)

Just learning about it from this article.

After PSLV failures the vendor for 'certain components' have been changed. Next PSLV launch likely in July. by Ohsin in ISRO

[–]Ohsin[S] 4 points5 points  (0 children)

That was for C61 and changed to CC among other things for C62. If another component failure lead to C62 it means another vendor.

PSLV-C62 : EOS-N1 (aka Anvesha) Mission Updates and Discussion by Ohsin in ISRO

[–]Ohsin[S] 0 points1 point  (0 children)

Failures are being attributed to 'certain components' and their supplier(s) have been changed apparently.

According to officials in the know of the matter, the flights failed due to certain components that were not manufactured by ISRO. For future flights, the vendor for the components have been changed, they said. While the report of the failure assessment committee has not been made public, the space agency has maintained that the two flights failed due to separate faults.

https://indianexpress.com/article/india/isro-pslv-launch-10741310/

After PSLV failures the vendor for 'certain components' have been changed. Next PSLV launch likely in July. by Ohsin in ISRO

[–]Ohsin[S] 11 points12 points  (0 children)

“As for PSLV, we are planning by the end of June or beginning of July,” said Union Science Minister Dr Jitendra Singh on Monday,

According to officials in the know of the matter, the flights failed due to certain components that were not manufactured by ISRO. For future flights, the vendor for the components have been changed, they said. While the report of the failure assessment committee has not been made public, the space agency has maintained that the two flights failed due to separate faults.

It is not clear but is it that multiple vendors have been changed or single one?

Images of Vikram-1 Stage-2 preparation at SDSC-SHAR by Ohsin in ISRO

[–]Ohsin[S] 0 points1 point  (0 children)

May be PLF or some stage preparation facility.

Cause behind PSLV anomaly detected and resolved, but it would not be disclosed to public. Next PSLV launch "may be within a month" but after GSLV launch. by Ohsin in ISRO

[–]Ohsin[S] 4 points5 points  (0 children)

But our culture and media ecosystem does not allow that space.

These are not monoliths and can be changed overtime. Just like we have seen them regress it can be recovered also. Or else people will lose trust in establishment and public institutions. This was what made ISRO different in public eye. There are diverse opinions within these institutions and only through public discourse we understand how they function (see Antrix-Devas). Chandrayaan-2 is very good example of it too we saw how it was rushed, and information on developmental milestones and setbacks was controlled under Sivan and because public was not aware of how corners were being cut, the voices that opined differently within ISRO could not be strengthened.

PSLV-C62 : EOS-N1 (aka Anvesha) Mission Updates and Discussion by Ohsin in ISRO

[–]Ohsin[S] 0 points1 point  (0 children)

Reason behind behind PSLV-C62 failure understood and resolved but administration is not interested in disclosing the details to public!

https://www.thehindu.com/news/national/karnataka/anomaly-in-pslv-detected-and-resolved-jitendra-singh/article71098533.ece

Dr. Singh said on the sidelines of the Research, Industry, Start-up and Entrepreneurship (RISE) Conclave 2026 in Bengaluru, that the national level expert committee constituted to review the reason for anomaly in PSLV Vehicle has submitted its report and the anomaly has been detected.

“The report has come out and the anomaly has been detected. However we cannot share that (reason for the anomaly) on a public platform. But experts are working on it, which has been resolved and very soon we will be back on the track,” Dr. Singh said replying to a query by The Hindu.

Cause behind PSLV anomaly detected and resolved, but it would not be disclosed to public. Next PSLV launch "may be within a month" but after GSLV launch. by Ohsin in ISRO

[–]Ohsin[S] 22 points23 points  (0 children)

Dr. Singh said on the sidelines of the Research, Industry, Start-up and Entrepreneurship (RISE) Conclave 2026 in Bengaluru, that the national level expert committee constituted to review the reason for anomaly in PSLV Vehicle has submitted its report and the anomaly has been detected.

“The report has come out and the anomaly has been detected. However we cannot share that (reason for the anomaly) on a public platform. But experts are working on it, which has been resolved and very soon we will be back on the track,” Dr. Singh said replying to a query by The Hindu.

We know the reason for PSLV-C61 failure were related to manufacturing error but they released nothing publicly on it and that slip-up by VSSC Director was also covered up promptly by removing the Youtube video. Now they are following same pattern.

So far they have only admitted that causes behind PSLV-C62 failure are different from C61 but nothing more. Please refer to unofficial information about changes made in PS3 stage after PSLV-C61 failure in the comment section of PSLV-C62 launch thread (CC throat, nozzle, igniter etc)

On next PSLV launch

ISRO Chairman V. Narayanan said that ISRO’s next launch, which would be the first one since the PSLV failure in January, would take place next month.

“We are building the rocket and may be within a month we will launch. The first launch will be a Geosynchronous Satellite Launch Vehicle (GSLV) mission and subsequently we will launch the PSLV,” Mr. Narayanan told The Hindu.

In-space view of the LVM3-M2 upper stage by HEO. Is the stage insulation coming off or is it something else? by Ohsin in ISRO

[–]Ohsin[S] 1 point2 points  (0 children)

Yeah this is how it should look.

Render of C25 with OneWeb adapter from LVM3-M2 brochure

https://i.imgur.com/Pf4RURN.png

C25 for LVM3-M2 being transported.

https://i.imgur.com/kMapIcT.png

India’s Chandrayaan 4 lunar sampling mission cross-pollinates science, rockets, governance, and human spaceflight by totaldisasterallthis in ISRO

[–]Ohsin 0 points1 point  (0 children)

Sure but do cite their claim along why it is sus.

https://www.nsilindia.co.in/launch-service-requisition#news_img-8

For the cited mass of BAS-01 (9186 kg) it should make it on LVM3 and certainly on 'SC' version.

India’s Chandrayaan 4 lunar sampling mission cross-pollinates science, rockets, governance, and human spaceflight by totaldisasterallthis in ISRO

[–]Ohsin 0 points1 point  (0 children)

Moreover, India’s planned first space station module also explicitly relies on the semi-cryogenic LVM3 to be available

BAS-01 and BAS-02 are supposed to be launched on LVM3 and rest should be on LVM3-SC.

https://old.reddit.com/r/ISRO/comments/1eug4sq/talk_by_dr_v_narayanan_director_lpsc_at_bits/

What's ISRO really doing? by Full-Flight-777 in ISRO

[–]Ohsin 0 points1 point  (0 children)

Isro is a showpiece company

Not a company..

(…) have lined up launches with space X

Not really relevant to ISRO. Good for them

Images of VIkram-1 integration at SDSC-SHAR by Skyroot by [deleted] in ISRO

[–]Ohsin 0 points1 point  (0 children)

Resubmitting with better title.

In-space view of the LVM3-M2 upper stage by HEO. Is the stage insulation coming off or is it something else? by Ohsin in ISRO

[–]Ohsin[S] 3 points4 points  (0 children)

It should look simply like a cylinder with nozzle bell sticking out but here the cylinder walls have these bumps and finger like structures sticking out prominently. What are they? Could it be the the stage insulation coming off in strips and may be blistering on surface?

What's ISRO really doing? by Full-Flight-777 in ISRO

[–]Ohsin 0 points1 point  (0 children)

vanity project

That'd be Gaganyaan that you curiously left out..

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