SolidBoosters2 🇮🇳

@gopal_lohar_0 @ispaceflight_in @Lokeshkr73 @isro Not a custom-trained model yet Currently using an off-the-shelf CNN-based OCR (EasyOCR)

@ispaceflight_in @SolidBoosters2 @Lokeshkr73 @isro Custom CNN?

We’re cooking something big for indianspaceflight.in The biggest hurdle? Syncing our dashboard with the official #ISRO countdown in real-time.

"Massive network of 1,500 AWS across India" Current status:- ❌ Inaccessible to the public ❌ Many not updated daily on resp. state websites ❌ Many faulty/not functioning ❌ "Real-time updates" - locked Might as well dust them daily & store them in museums.

ISRO scientists recovered PSLV debris found near Thondi Coast, Tamil Nadu On March 12, local fisherman spotted a rocket debris floating approximately six nautical miles off the Thiruppalaikudi coast. Marine Police identified the object and informed ISRO. A three-member ISRO team from Thiruvananthapuram, led by Scientist Saju, arrived at the spot. Later the part was recovered and sent to VSSC. The debris is the SITVC (Secondary Injection Thrust Vector Control) System, which is a used to control the pitch and yaw of the PSLV's first stage (S139 Booster). This system has 24 injection ports near throat of the S139 booster's nozzle and it works by injecting Strontium Perchlorate into the nozzle of the booster to create flow variations to achieve the pitch and yaw control. 📸Credit: @the_hindu

Vector Technics is launching a 𝗦𝘁𝘂𝗱𝗲𝗻𝘁 𝗧𝗲𝗮𝗺 𝗦𝘂𝗽𝗽𝗼𝗿𝘁 𝗣𝗿𝗼𝗴𝗿𝗮𝗺 for teams developing UAVs for drone competitions and research, under which propulsion components will be provided at discounted pricing. 𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲 𝗖𝗼𝗺𝗽𝗼𝗻𝗲𝗻𝘁𝘀 • 3115SL 900KV Motor [Datasheet - tinyurl.com/VT3115SL900KV] • 10-inch Tri-blade Propeller Set • 4-in-1 ESC 𝗗𝗶𝘀𝗰𝗼𝘂𝗻𝘁 𝗦𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 • Motor Only - 15% • Motor + Propeller Set - 20% • Motor + Propeller Set + 4-in-1 ESC - 25% Limited engineering support available for propulsion setup and troubleshooting. 𝗣𝗿𝗼𝗴𝗿𝗮𝗺 𝘃𝗮𝗹𝗶𝗱 𝘂𝗻𝘁𝗶𝗹 𝟯𝟭 𝗠𝗮𝗿𝗰𝗵 𝟮𝟬𝟮𝟲. Student teams can apply using their official student email ID by emailing: Team name, Institute name, Student IDs, Team POC, Competition proof, Drone platform info, Required quantity, Shipping location 𝗖𝗼𝗻𝘁𝗮𝗰𝘁: business@vectortechnics.com

What justifies calling it 'next-gen'? What does it bring to the table that current Shahed-like drones cannot ???

@astrobase_space is rapidly constructing their engine test facility in Andhra Pradesh. They are planning to test their 80t class LOX-Methane FFSC engine later this year, at this site.

Any update on this, @Defencematrix1? Or are they still waiting for @IAF_MCC to provide the aircraft for testing??

Why do atomic clocks fail in space? Let me tell you how an atomic clock works. Very recently India lost IRNSS-1F's atomic clocks. Not 1 clock, all redundant clocks stopped working. Today India has only 3 active positioning satellites in space. In-sufficient to trilaterate position on ground. Clocks are very important because, to put it simply, we use the speed of light to calculate our distance from multiple known satellites. Speed of light is 3*10^8 m/s , so if we need an accuracy of 1m we would need clocks of the accuracy 1/c seconds. Order of nano/pico seconds. Atomic clocks are no different from ordinary clocks. Any ordinary digital clock has a quartz crystal ( or a turning fork ) which oscillates at a specific frequency. Most watches have it at 32768 times/second. 32khz. Why? It's a power of 2. 2^15 to be precise. We use piezeo electric effect to turn this osscillation into a voltage signal and this signal of 2^15 hz when passed through a series of flip-flops can give us a 1hz signal. Very simple circut. This 1hz signal is used to drive the stepper motor and then gears and then hands. This is how a normal clock works. But the problem here is the oscillation is damped. Friction stops the oscillator and so we need active resonant feedback to oscillator to keep it's motion. That is where we use electronic feedback to keep the osciallations going. This is like a drummer...doing a continuous note and when he sleeps we zap him with electricity. Now in this process over time, the osciallator due to mechanical wear and tear, temperature, aging shows a drift. In general watches there is no absolute reference to correct this drift. Usually in hand held watches this may be 1sec a day. If we loose one second in GPS, it will put as 300,000 km way from where we are. This is where atomic clocks come into play. Atomic clock Feedback mechanism ================== => We still have a local oscillator (quartz or microwave). =>This oscillator drives atoms (e.g. cesium/rubidium =>These atoms inherently have specific states, which can be achieved through a specific frequency radiation. We generate that radiation using the osciallator frequency. =>You measure how well the oscillator frequency matches the atomic transition =>A feedback loop continuously corrects the oscillator to maximize atomic resonance. With drummer analogy, the drummer is now not alone. There is a specific metronome playing in the background and drummers beats are always synced to that. Dealing with drastic thermal cycles, radiation and extreme aging. This is where most of the potential issues arise. The rubidum lamps are extremely precise machines working hard every second to maintain osciallation & excitation of the entire system. When these fail, an entire satellite fails. India has been working on indegenious atomic clocks, that coupled with terrestrial /alternative PNT sources. A very focused effort is 100% needed in this area.

RTI:

An old unused us army barrack that was being used as a makeshift rehab center was bombed by the pakistanis. They are a shameless and morally bankrupt bunch of cowards. They preach about Kashmir's right to self-determination 24/7 yet commit all sorts of crimes against the baloch people for wanting the exact same thing. Furthermore they shout 24/7 about Palestine getting bombed, only to go and bomb defenseless Afghans.

Pakistani airstrikes on Addicts treatment hospital in Kabul kills 400.

@isro has issued a new #NOTAM for the Gaganyaan IADT-02 test starting March 21! An IAF Chinook will lift a 4.8-tonne Crew Module to 3 km to validate the critical 10-parachute recovery sequence before the first uncrewed G1 mission. Read the full technical breakdown and mission window details here: indianspaceflight.in/latest/iaf-chi…

@jaiswal_sh4296 🙃

@SolidBoosters2 What's the hurry? It will take 5-10 years for certification, until then enjoy the occasional glimpse. Private startups like Green Aero, DG Propulsion, Raghu Vamsi and Nabhdrishti will deliver production ready turbo jet engines before NAL babus develop the second prototype.

Fuel efficiency and thrust-to-weight ratio??

Update: A revised #NOTAM designated A0936/26 has been issued, replacing the previous alert (A0396/26) for the Integrated Air Drop Test (IADT-02). The updated enforcement window is now 06:00-10:30 IST (0030-0500 UTC) from 21 March to 04 April 2026. #ISRO #IADT02 #NOTAM Mapped here: indianspaceflight.in/notam?notamId=…

🔥🔥

@YoddhaGene @isro For Gen-1 sats we didn't had the tech so we sourced it from foreign supplier for Gen-2 sats we do make it indigenously.

@SolidBoosters2 @isro Why are we unable to make these atomic clocks?

#NavIC’s clock issues weren't an @isro engineering lapse, but a global supply chain crisis the same Swiss-made clocks crippled 🇪🇺 Galileo. But while the hardware failure was imported, the institutional response was a domestic failure. ​Read more here: indianspaceflight.in/latest/the-nav…

@Jha00Jha @isro For the Gen-2 series satellites, we have already developed our indigenous RAFS. In fact on NVS-01 our indigenous RAFS serves as the primary clock.

@SolidBoosters2 @isro India only assambly things

@parim @isro No there are some american supplier also but If you are building a system specifically to be independent of the U.S. GPS it makes little strategic sense to buy the heart of that system from a U.S. suppliers.

@SolidBoosters2 @isro Is the Swiss company the only source for these rubidium clocks. In hindsight it feels like we should have dual/triple sourced these clocks.