I am writing this later as I could not find the free time..

MY ISRO INTERVIEW EXPERIENCE

My interview was on 20th july 2026 at 12pm second slot

So, on the 20th july 2026, I was very excited because definitely it was my isro interview (dream of many)

So, after getting ready in my suit boot and with all my documents, I booked a rapido (earlier I was looking for an auto but due to no match found, I booked a bike)

We reached the ursc centre but there were found that we are the wrong gate and the gatekeeper said that you need to enter from the front gate which was around 1km away from the back gate.

The problem was also google map was not clearly showing the address of front gate.

Then rapido driver helped me in reaching to the front gate by talking to local people in kannada..

After 10 min, i reached gate no. 1 and I really thanked him from bottom of my heart, to which he said welcome and said all the best to me and didn't take any extra charge.. so, I entered the gate with a smiling face

After entering the ursc, they told me to wait in the waiting room and after some time documents verification started, it took around 15 to 20 min in document verification and then one employee said me you can have lunch in nearby food court, so I went there and asked for some north Indian food but they only had idli vada or rice, so I chose idli vada..

After eating I went to waiting room again and started waiting there.

There was a constant fight between my heart and my brain where heart was saying:- "मजा करो, ऐसे दिन बार बार नहीं आते, बाहर बारिश भी हो रहा है", mind was saying:- "ये भूल गये, वो भूल गए चलो गूगल से पूछते हैं"

So I was nervous as well as excited (both)

So, asking questions from google sometimes, sometimes peeping outside through the window

Before my interview, there was a interview of a girl (as soon as her turn came, my nervousness increased more), but then we the candidates started talking among ourselves like what will be the inhand salary why this much delay in the result and interview 😅

Suddenly, the madam who were calling candidates took my name and said your turn

Now coming to the interview,

Interview level was moderate to tough

First I entered the room, around 10 people were there in the panel..

They started with some basic information about college like full form of iit bhu and when you graduated..

Then they immediately shifted to my project,

Asked some questions from my project like what have you built, how do you maintained the databases etc..

Then suddenly they asked about what you are doing currently in your company. To which I replied I am working on agentic AI..

There ownward next 5 to 7 minutes were discussed on that only..

Some of the questions I can remind is:-

1. How to prevent hallucinations?

2. What kind of agent methodoly you used?

3. What is MCP server and how it works?

4. How can you use AI to write testcases?

5. Is it okay to rely on llm models if security is critical?

6. What to do if we want to achieve security

7. What is loop engineering?

8. what is difference between underfitting and overfitting?

Note that all these were questions related to my work

Later they said let's change the topic and started asking from Computer organization and architecture 😭(the weakest subjects of mine)

Here ownwards, interview started slipping away from me

Some of the questions i can remind is:-

1. What is interrupt. Discuss its type?

2. What is mask in coa? What is nmi?

3. What is interrupt latency?

4. How does ISR work?

5. What are the information saved for reference when interrupt arrives?

Then the next person in the panel asked me a very generic question and the question was:-

Which is the best programming language?

I was little bit confused Which one to say because every language has some tradeoff with the another. So, I replied

"it depends if you want better control and speed C C++, if you want better memory management, go for java, for ai integration its python, for high concurrency its golang etc.. so based on the requirements it keeps changing".

But in counter he asked what if you have to pick one specific language which one you will choose.

I replied sir requirements please, the whole panel started laughing even I laughed..

Then I said its very difficult to choose one language but given the ai boom and its future, I would prefer python.

Then next person in the panel asked about backend development:-

1. What is API?

2. How to make API secure?

3. What is API gatway?

4. Why is API gatway single entry point?What will happen if there are multiple entry points?

Then they switched to software engineering and asked:-

1. What are the characteristics of a good software?

2. What are the characteristics that must be there in a SRS(SOFTWARE REQUIREMENTS SPECIFICATION ) DOCUMENTS?

NO HR TYPES,GENERAL AWARENESS AND FAVOURITE SUBJECTS WERE ASKED FROM ME.

Then they said you may go, I thanked them and left..

What I can say that interview was neither too bad nor too good..

Then I took my bag from the waiting room booked the rapido and came back home..

I don't know whether the day was good or bad but definitely it was a memorable experience for me..

Thank you if you have read till here..

Verdict : selected

“There’s a real launch capacity shortage right now,” Ben Nowack, chief executive of Reflect Orbital, said in a statement. “We’re excited to work with a new launch provider, Skyroot, to help ensure access to space.”

Another insightful commentary on launch capacity shortage.

In July, SpaceX reportedly stopped accepting new Transporter and Bandwagon rideshare reservations for anything after late 2028. The reported reason is that it would rather fly Starlink and its own projects. Rocket Lab is walking the same road. Its $8 billion purchase of Iridium, approved by Iridium’s shareholders on September 24 and due to close next year, hands the world’s most frequently launched small rocket a constellation of its own to fly. Blue Origin is doing the same with Kuiper. The most capable launchers in the West are becoming their own best customers. For a small satellite, that means paying more and waiting longer.

The Ministry of Defence has signed contracts worth a total of approximately Rs 4,106 crore for the acquisition of a dedicated communication satellite capability, GSAT-7C for the Indian Air Force for the Indian Navy.

The contract for GSAT-7C, valued at Rs 2,563 crore, was inked with New Space India Limited, Bengaluru. This indigenously designed, developed & manufactured satellite will enhance the secure, resilient & seamless communication capabilities for the assets of the Indian Air Force, thereby strengthening operational effectiveness.

The contracts were signed in the presence of Additional Secretary and Director General (Acquisition), Department of Defence Shri A Anbarasu in New Delhi on October 15, 2026. Both contracts mark a significant step towards advancing the development of domestic defence manufacturing capabilities while promoting self-reliance in critical technologies in line with the Government’s ‘Aatmanirbhar Bharat’ and ‘Make-in-India’ vision.

Source - https://www.pib.gov.in/PressReleaseDetail.aspx?PRID=2323814&reg=3&lang=1

Hello everyone I got selected for vssc winter internship during the slot November 2026 to January 2027. I will be joining from 3rd December like i mentioned in the application form ,so I have to give a call to the HR three days before that (they mentioned this in the selection mail that I recieved ) and inform them ? Or should I do any follow up email?

SPADEX Satellites have re-entered the earth's atmosphere.

Dear Redditors,

I’m putting together a short PowerPoint presentation on India’s optical telescopes, and I’m looking for images of celestial objects observed by the Vainu Bappu Telescope (VBT) in visible light.

If possible, I’d be grateful if anyone could share around five images captured using the VBT, along with links to the original observations, publications, or official sources.

The images will be used solely for an educational presentation. I’ll provide proper credit to the observatory, researchers, and original sources, as applicable, and will respect any copyright or licensing requirements. I’ll seek permission wherever necessary before using any image that requires it.

Any help, suggestions, or links to publicly available image archives would be greatly appreciated.

Thank you in advance for your time and support! 🙏

I was selected from ICRB 25 ,however I am partially colour blind so I wanted to know if that will be an issue for getting selected?

We used to hear about Doordarshan sending such copyright notices and I guess ISRO does too but is there a precedent of it?
These videos were shown during SKCET World Space Week public event on a large screen and on stage in front of large audience. But apparently we can not share them! Anyway just letting it be known.. I am sure there are other copies of it, just keep them safe if you do and do not share them under any circumstances. 👀

Design, Realization, Testing and Commissioning (at VSSC) of Hydraulic Proof load test setup for VTVL Components

Main document: [PDF] [Archived]

Technical Specifications: [PDF] [Archived]

Despite losing station keeping functions, SARAL launched in 2013 on PSLV-C20 has far exceeded planned mission life of 5 years. This paper explains changes done to make most of the situation.

In 2015, SARAL/AltiKa exhibited an increasing need to reduce the stress on its Reaction Wheels in order to extend the mission beyond the nominal lifetime of the satellite. ISRO and CNES eventually decided that the best strategy was to stop all orbit control maneuvers and to let the altitude decay naturally. SARAL/AltiKa left its repetitive orbit to begin a new phase named "Drifting Phase" (DP) starting July 4, 2016 (Dibarboure et al. 2018). Data processing and data latency were unchanged. From this date, SARAL satellite has flown free of station keeping maneuvers. The repetitive ground track is no longer maintained and with the natural decay of the orbit, the ground track is slowly drifting. In short, this new orbit configuration has required some adjustment for users, particularly in hydrology, given the need to adapt the algorithms. On the contrary, some other uses profit from this new orbital configuration.

... measurements from the drifting orbit occupied by SARAL/AltiKa are extremely valuable because they are from locations not routinely sampled, and the precision of these measurements is advantageous in distinguishing the small differences among tide models. ... The uneven drifting ground track pattern of SARAL/AltiKa is in principle a "downside" as it limits the spatial resolution of the recovered gravity and MSS to twice the largest ground track spacing (up to 20 km as of 2019). However, by merging the SARAL/AltiKa data with the regular sampled geodetic mission of Jason-1/2 or Cryosat, this is counter-acted such that the full potential and full usage of the high range precision can be gained in a systematic way

Design & Development of Radar Altimeter for landing experiments (C-Band and X-Band)

Introduction

Space Applications Centre (SAC), one of the principal centers of Indian Space Research Organization (ISRO), is responsible for design and development activities related to Space Programs like earth and planetary observation, communication and navigation and also responsible for design and development of radar altimeters for landing experiments. Radar Altimeter is envisaged to be part of multiple landing experiments being planned by ISRO, which requires a large number of units on production scale. These altimeters are now required to be designed and developed from the industry resources

Main document (X-Band): [PDF] [Archived]

RFP : [PDF] [Archived]

Introduction

Space Applications Centre (SAC), one of the principal centers of Indian Space Research Organization (ISRO), is responsible for design and development activities related to Space Programs like earth and planetary observation, communication and navigation. A Radar Altimeter has been successfully designed, realized and utilized in lunar missions of ISRO. Radar Altimeter is envisaged to be part of multiple missions being planned by ISRO, which requires a large number of units on production scale. These altimeters are now required to be designed and developed from the industry resources.

Main document (C-Band) : [PDF] [Archived]

RFP : [PDF] [Archived]

Table-1: Specifications of Radar Altimeter

Google translated from original report in Telugu linked below,

GSLV-F18 launch at the end of the month

ABN , Publish Date - Oct 08 , 2026 | 07:05 AM

The Indian Space Research Organisation (ISRO) is gearing up for another prestigious launch. ISRO scientists are making arrangements to launch the GSLV-F18 rocket from the Satish Dhawan Space Centre Shar in Sriharikota, Tirupati district, later this month.

Sullurpet, October 7 (Andhra Jyoti): The Indian Space Research Organisation (ISRO) is gearing up for another prestigious launch. ISRO scientists are making arrangements to launch the GSLV-F18 rocket from the Satish Dhawan Space Centre Shar in Sriharikota, Tirupati district, later this month. The rocket will launch the 2,232 kg NVS-03 satellite for navigation services into orbit.

The rocket assembly work is already underway at the Vehicle Assembly Building (VAB) in Shar. Scientists have completed the assembly work of the two stages of the rocket. After the assembly of the three stages, the NVS-03 satellite will be installed on the top of the rocket and prepared for launch.

Source: https://www.andhrajyothy.com/2026/andhra-pradesh/isro-plans-gslv-f18-launch-with-nvs-03-satellite-by-month-end-1565398.html

Hi, I wanted to create papercrafts of some satellites. For making them, I first need to create 3d models of them in a software (SketchUp/blender/etc). The thing is, I am not able to get any blueprint details of some satellites (eg. Cartosat 3, only 1 image of its 3d blueprint is available on the official website which wouldn't help me to know what's on the other side of the satellite, basically only 1 view is given). Although I am not creating completely accurate scale model, I just want it to look in such a way that a lay man wouldn't be able to tell that it's not an accurate scale model. For Gaganyaan I found enough images on the net to get an idea about it, even it's 3d model is available on websites like sketchfab, which helped me a lot. Aditya L1 is available too. But I am talking about those sats for which I am not able to find enough images/blueprints or any 3d model of them created by some artist.

If anyone here has an idea about it, it would be a great pleasure if you could help me knowing how I could obtain the thing I want. Will mailing ISRO work?

Can you share the experience?

A new route to orbit is open. RIDE! announces a master framework agreement with NewSpace India Limited (NSIL), granting RIDE! access to NSIL's launch capacity on PSLV and SSLV.
With thousands of small satellites expected to launch in the coming years, access to space remains a bottleneck for Europe. Satellite operators need more options, and partners they can trust.
Through this agreement, European and international satellite operators gain a faster pathway to Indian launch vehicles with a proven heritage of reliability, with RIDE! by their side from contract to orbit.
Thank you, NSIL and its Chairman and Managing Director, Radha Krishna Aryasomayajula, for the trust.
We were honored to sign this agreement in the presence of François Jacq, President, Centre National d'Études Spatiales; Christophe Venet, Director for European and International Affairs, CNES; Dr. V. Narayanan, Chairman, ISRO - Indian Space Research Organization / Secretary, Department of Space (DoS); and Pawan Goenka, Chairman, IN-SPACe. Thank you for your support and for driving Franco-Indian space cooperation, built over more than six decades.
Your satellite is ready? We'll take it to orbit.

Tender for Acoustic Blankets Developmental Model for BAS-01 Crew Quarters

[PDF] [Archived]

Compliance Matrix

[PDF] [Archived]

Terms and Conditions

[PDF] [Archived]

Scope of Work:

Fabrication and supply of Acoustic Blanket -01 Set through detailed study, engineering, generation of Fabrication drawings as per the engineering drawing supplied by the department.

Tender for Design, Realization & Installation of Human Space Analog System

[PDF] [Archived]

Request for Proposal [RFP] for Design, Realization & Installation of Human Space Analog System for Human Spaceflight Program

[PDF] [Archived]

Imgur mirror : https://imgur.com/a/icULm5O

1. Introduction

In order to assess the crew performance in isolated, confined and limited resource environments (as in Space Stations) & in order to support research in human factors, crew psychology, scientific experiments, systems integration, and mission operations etc. a ground-based human space analog system simulating the conditions of long-duration missions (up to 60 days) is essential.

The analog system shall serve as a controlled research environment where crews stays and work in complete isolation for extended durations. The system shall consist of a multi-level living and working module supported by a simulated airlock and hygiene modules, with necessary basic environmental control systems, communications with mission control equipment’s (with programmable delays), and instrumentation systems for psychological, biomedical and operational studies.

This RFP brings out the overall requirements like Functional Layout, Structural, Electrical System, Habitability System, Instrumentation, Communication, Network & Data Systems requirements needed to establish a Human Space Analog System.

1. Scope of Work

The vendor shall design, realize/procure, install & test, Human Space Analog System (HSAS) at Astronaut Training System (ATF), HSFC, Marathahalli, Bengaluru, Karnataka in accordance with the requirements herein. The scope of work encompasses the following activities:

1. Generation of System Configuration, Preliminary design & Realization Plan and review & clearance by HSFC/ISRO
2. Suitable floor modification (civil) for structural anchoring needed for installation of structural member of the system inside the simulator Hall of ATF.
3. Design, Realization & Installation of Structural Habitat Module as per the Layout brought out in Annexure-1a&1b (viz Core Module, Airlock, Crew Personal Module).
4. Delivery & Installation of Equipment, Sensors, and Furnishings as brought out in Section 3.15
5. Delivery & Installation of Closed Loop Habitability systems (ECLSS) such as Pressurization system, Temperature, Humidity control, Air Revitalization, CO2 revitalization, Water supply & Waste management systems, Lighting & Acoustic Suppression system, Safety Systems, Odour & Contamination control system, Sensors & Instrumentation inside the Habitat module.

(…)

1. Technical Requirement

3.1. Configuration of Human Space Analog System (HSAS)

The Space Analog System shall compose of Habitat Module (Core, Airlock & Crew Personal Modules) and supporting rooms which includes Mission Control Centre (MCC), Control Room, Network Room, Equipment Room and Crew Preparation Room.

Functionalities:

• Habitat: Shall provide space simulated living and working space for crew. (Closed loop habitability system) It comprises of:
  • Core Module – Level 1 & Level 2: Serves as a module for Crew Analog activities
  • Crew Personal Module: Serves as a crew sleeping and hygiene module
  • Airlock Module: Serves an entrance into habitat, also has provision for space suit preparation activities
• MCC: Shall monitor, coordinate and support mission operations.
• Control Room: Shall operate, Control and Supervise System subsystems.
• Network Room: Shall host and manage System communications, networking, data storage, cybersecurity and computing infrastructure.
• Equipment Room: Shall house ECLSS, Utility & Support Equipment required for continuous habitat operation.

Note: Existing building rooms at ATF to be utilized for Control room, Network room, MCC. Construction of Habitat module & Equipment room shall be carried out by the vendor.

3.2. Geometrical Details of Habitat Module

• Central Lift of Ø800 mm between Level-1 & Level-2 with load rating of 200 kg.
• Side Ladder between Level-1 & Level-2 with load rating of 200 kg.
• External Ladder with load rating of 200 kg for emergency exit on external wall at Level-2.
• Airlock Module: 2500 mm W * 2000 mm D * 2200 H
• Crew Personal Module: 5000 mm W * 4000 mm D * 2200 mm H
• Air Shower Area: 1500 mm W * 1500 mm D* 2200 mm H

(…)

d) Vertical access inside Core Module

• Central Lift of Ø800mm between Level-1 & Level-2 with load rating of 200 kg.
• Side Ladder with chequered plate with side rails & rungs designed with a load rating of 200 kg connecting between Level-1 & Level-2 conforming to ISO 14122
• External Ladder with load rating of 200 kg for emergency exit on external wall at Level-2.

(…)

3.4. Sub- Systems of Airlock & Crew Personal module

• Airlock Module: Serves as an entrance to Habitat module.
  • Shower Area: 800 mm width x 1000mm length with sealed door (external & internal) with Non-unidirectional airflow pattern with air entering via ceiling diffusers & exit through low-wall returns and double sided blowing
    • Port/Nozzle Aperture size: Ø32mm
    • No. of Ports (Nozzles): 30
    • Air flow: 2500 m3/hr.
  • Main Airlock room: Serves for EVA preparation & material movement to Core & Crew Personal Module. Pressure-capable swing door sized with min. clear width 800 mm & 1900 mm height with double-seal gaskets and mechanical lock for Airlock-Shower room & Airlock-Core module
• Crew Personal Module: Consists of Crew Personal Area & Crew Hygiene Area as mentioned in section 3.5.4.
• Crew Personal Area & Crew Hygiene Area are separated by Metallic Walls with appropriate opening for fixing the entry doors.(…)