Kartik Ramakrishnan

yā matiḥ sā gatiḥ

[Kartik Ramakrishnan @kartikramakrish]

Possibly the best distillation of 'how to be happy'

[Josh Gessner @joshgessner]

Most people are unhappy.

So, I've spent 100 hours studying Naval Ravikant over 2 years .

What I found?

Naval's Happiness Theory:

[VishwaGuru_Ghantal @Vishwaguru2026]

Mess i 🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣

[Malay Krishna @Malay4Product]

Let me explain what just happened today because it deserves so much recognition.

GalaxEye is a Bengaluru startup founded in 2021 by IIT Madras engineers. Today they launched Mission Drishti on a SpaceX Falcon 9. It is India's largest privately built satellite at 190 kg. And it carries a technology that no commercial satellite has ever carried before.

Normal satellites take photos of the Earth using optical cameras. Like your phone camera, but from 500 km up. The problem is obvious. Clouds. Night. Fog. Smoke. If any of these are in the way, the photo is useless. India has monsoon cover for 4 months a year. That is 4 months where optical satellites are partially or fully blind over large parts of the country.

The alternative is SAR. Synthetic Aperture Radar. Instead of taking photos with light, it sends radar waves down and reads what bounces back. Radar goes through clouds, through darkness, through smoke. A SAR satellite can image a flooded village at 2 AM during a cyclone when no optical satellite can see anything.

The problem with SAR is that the images look nothing like photos. They look like grainy black-and-white radar maps. A military analyst or a trained geospatial engineer can read them. A farmer, a disaster response team, or a city planner cannot.

Until today, if you wanted both optical and SAR data for the same location, you needed two different satellites, passing over at different times, at different angles. Then someone had to manually align and fuse the two datasets. Expensive, slow, and the data never perfectly matched because the satellites saw the same spot minutes or hours apart.

GalaxEye put both sensors on one satellite. Optical and SAR, fused into what they call OptoSAR. Three times more information than a single sensor. Processed onboard by an NVIDIA AI chip at 1.8 metre resolution.

Now in practice, during the next cyclone hitting Odisha, one satellite pass gives you a clear image of which villages are flooded, which roads are cut, and which buildings are standing. Day or night. Cloud or clear. In near real-time.

For defence, it means you can monitor a border area 24/7 regardless of weather. For agriculture, it means tracking crop health across an entire monsoon season without a single cloud gap. For infrastructure, it means monitoring construction progress on highways and bridges without waiting for a clear day.

GalaxEye tested their SAR tech on ISRO's POEM orbital platform. The satellite was tested at ISRO facilities. IN-SPACe provided regulatory clearance. NSIL, ISRO's commercial arm, will distribute the imagery globally. And it launched on SpaceX because ISRO's PSLV doesn't have the right orbit slot for this mission.

Yes, four IIT Madras graduates built a world-first satellite in 4 years in Bengaluru.

Take a bow!

[Bharata itihasa @BharataItihasa]

1/10 The India story begins long before cities. Anatomically modern humans reached the subcontinent roughly 73,000 to 55,000 years ago, and settled life began much later, around 7000 BCE, on the western margins of the Indus alluvium #BharataItihasa #IndianHistory #HistoryFacts

[Ganesh Babu ⚙️ @theurbanismguy]

History of Tamils

Mostly from the book of the same name by Nilakanta Sastri, 1963

Part 1: The land and the people
A thread 🧵

[Sahil Bloom @SahilBloom]

Andy Weir's short story, The Egg, is one of the most mind-blowing things you will ever read.

Do yourself a favor and find 10 minutes to enjoy it.

[Heartfulness Gopichand Badminton Academy (HGBA) @HGBAcademy]

Hearty congratulations to Sachin & Neeraj from @heartfulness Gopichand Badminton Academy for winning the Singles and Doubles in Mixed Doubles at the Jharkhand State Championship and also for their well-deserved selection to the state team!

@PGopichand73

#badminton

[Kartik Ramakrishnan @kartikramakrish]

incredible comet picture..!

[Kartik Ramakrishnan @kartikramakrish]

What is a reasonable amount to be paying for your new @Toyota_India car’s second “Free” service? 😅

[NASA Webb Telescope @NASAWebb]

The world’s most powerful space telescope has done it again.

Webb has discovered what appears to be a new record-holder for the most distant known galaxy — shattering its own previous record. This galaxy existed only 290 million years after the big bang: https://t.co/6JN3L2CvRG

[Kartik Ramakrishnan @kartikramakrish]

The Matrix - 1950's Super Panavision 70 https://t.co/A8FqY84sSG via @YouTube

[Kartik Ramakrishnan @kartikramakrish]

Plastics are the biggest problem, and few are aware of the magnitude of this https://t.co/Tt6PxTxzLG

[Kartik Ramakrishnan @kartikramakrish]

Wonderful experience flying Air India after quite a while. Brand new A350, was on-time, staff were pleasant from the check-in counter onwards. Wife, who has fear of flying, loved it. Loving the all new @airindia #AirIndia #AIFans #ThisIsTata

[Historic Vids @historyinmemes]

Professor Brain Cox explaining how big our observable universe is.

[Tim Denning @Tim_Denning]

Keanu Reeves once said:

"I’m at the stage in life where I stay out of arguments. Even if you say 1+1=5, you’re right. Have fun."

Here are 9 things I learned from him:

[Kartik Ramakrishnan @kartikramakrish]

Interesting research.
Key insight: People using High pressure showers use less water than average

[Kartik Ramakrishnan @kartikramakrish]

"Toyota argues that the overall carbon reduction achieved by these 90 hybrids over their lifetime is 37 times greater than that of a single battery electric vehicle."

[Kartik Ramakrishnan @kartikramakrish]

"1:6:90 Rule essentially posits that the raw materials required to manufacture one battery electric vehicle could alternatively be used to produce six plug-in hybrids or a staggering 90 hybrid vehicles.

Read more at: https://t.co/tAH1ZkrCpO

[Latif Nasser @latifnasser]

Last January, I noticed something peculiar in my 2yo’s bedroom that - after a year of obsessive reporting - led me to a profound cosmic revelation about what’s even possible in our universe. A 🧵.

[Elon Musk @elonmusk]

Earth already receives about the same energy from the Sun in an hour than humanity consumes in a year.

Solar panels just need to catch a tiny amount of it to power our entire civilization!