Bharat Rakshak

Amber G.

The Invention of Zero: How Ancient Mesopotamia Created the Mathematical Concept of Nought and Ancient India Gave It Symbolic Form Saw this article today on my news feed. How valid is this article's thesis. Or is this another attempt to negate the origin of the concept of zero from India? This artic...

Amber G.

"If people like to know more about how these indigenous clocks differ from the imported ones I can put something here from what I know" Please if you could. Also, anything to say on Cesium clocks and their Indian development? From what I know : The "oddness" of the Rubidium (Rb)...

Amber G.

^<deleted by author>

Amber G.

Sachin, Prem, Tanji, and others: These type of questions are valid. Some comments: The Dept of Space, the PMO & ISRO all need a collective kick in the butt. They need to cancel all "pride" programs like Shukrayaan, Gaganyaan etc and focus entirely on military requirements for the next ...

Amber G.

Lisa - Thank you! These kind of questions are great. Allow me to give a detail reply - My take but things can be easily checked by reportable sources. It is a fascinating—and by all accounts frustrating—technical mystery that nearly grounded India's "Desi GPS." You aren't alone in noticing...

Amber G.

^^There are reports, Iran blowing up Terroristani Tanker (per Iran it was bound to go to US)

Amber G.

Okay - Another Challenge (Without (or with) googling can you guess who is this Legendary theoretical Physicist) https://pbs.twimg.com/media/HEbHzbcbEAAbaHv?format=jpg&name=medium Hint(s) : ( See how many you need) First Indian to Win Boltzmann Medal (Highest recognition in statistical physics) P...

Amber G.

Adding to above .. In case nobody as asked, would you care to speculate on how/why would so many Rubidium clocks fail. It just seems so odd. Lisaji - Good question, ( But in ISRO.scientists circle - everyone is asking it seriously and trying to solve this).. From my count (one can check Google): As ...

Amber G.

xposr: Recent months have seen a sharp global rise in GPS spoofing and jamming, especially in conflict zones like the Middle East and near Russia, where ships and aircraft are increasingly receiving false position data or losing navigation signals altogether. Thousands of vessels and hundreds of fli...

Amber G.

xposr: Recent months have seen a sharp global rise in GPS spoofing and jamming, especially in conflict zones like the Middle East and near Russia, where ships and aircraft are increasingly receiving false position data or losing navigation signals altogether. Thousands of vessels and hundreds of fli...

Amber G.

Trump’s New Announcement:

As per Iranian Government request, please let this statement serve to represent that I am pausing the period of Energy Plant destruction by 10 Days to Monday, April 6, 2026, at 8 PM, Eastern Time.”

Amber G.

Sharing Isro building Bharatiya Antariksh Station
The overall configuration of the Bharatiya Antariksh Station (BAS) has already been reviewed by a national-level committee, marking a key milestone in the country's human spaceflight ambitions.

Amber G.

https://indianexpress.com/article/technology/science/3-navigation-satellites-to-be-launched-by-2026-10147979 The first of the three, NVS-03, is scheduled to be launched by year-end. The other two, NVS-04 and NVS-05, will be launched after that “with a gap of six months,” as per data. The NavIC (Nav...

Amber G.

Sharing: Indian Express item How India’s nuclear energy programme transitions from uranium to thorium (IMO quick read: good - Gets the direction right not so good: Underplays time constants (30 -40 years) and neutron economics A more realistic framing would be: “Thorium is a multi-decade strategic h...

Amber G.

@Tanaji ( yours was a perfectly valid/serious question) and @Mukes - thanks - quoting and adding to my own: <snip> Managing and defending ~100 moving LEO satellites is far more complex than managing ~7 high-value GEO/IGSO assets. Lose even a fraction of a LEO constellation and local GDOP can degrade...

Amber G.

I’ll ignore the 'ivory tower' jabs and stick to the technical facts. First, I am not expanding the definition. I have clearly and consistently defined NavIC by its actual, documented mission parameters—which explicitly include sovereign timing and augmentation. You are the one arbitrarily shrinking ...

Amber G.

xpost: NVS-03 and 04 is planned to be launched in 2026. The failure of NVS-02 to the reach the intended orbit was studied, identified and fixed. So with these two launches, in 2026, the system will start gaining numbers. https://indianexpress.com/article/technology/science/3-navigation-satellites-to...

Amber G.

Instead of embarrassing yourself with 'roll on the floor' theatrics, let’s stick to the engineering reality you claim to champion. You are misapplying the NIST definition. In complex systems, 'Fit for Purpose' is defined by the specific mission objective: * Strategic Timing: NavIC is currently provi...

Amber G.

In engineering terms, it’s no longer “fit for purpose”. U may word smith it degraded, but engineers know it’s a failed system “In engineering terms”? :rotfl: Which engineering system are we talking about—standalone civilian SPS, or actual operational PNT stacks? Because unless we’re invoking Jihn’s...

Amber G.

@Mukesh.Kumar Thanks for kind words. **** Meanwhile, here is one more piece from Chindu (not that we need them to validate what we know): https://www.thehindu.com/news/national/another-satellite-in-navic-satellite-system-unable-to-function-limiting-its-security-capabilities-amid-concerns-of-reliance...

Amber G.

Nice try Amber G, trying to burn a strawman. ... But NavIC is currently dead/crippled. And its shameful that the PMO, Dept of Space & ISRO, due to their lack of funding/care/planning etc let it happen .. ... Your repeated assertions that "all is well" makes one wonder about your motiv...

Amber G.

NaviC system is NOT Dead. NavIC as a time distribution system Beyond positioning, NavIC is intended to act as a regional precise time dissemination network. In practice, this means: Broadcasting Indian Standard Time (IST)-traceable signals from space Allowing ground systems to synchronize to sub-mic...

Amber G.

viewtopic.php?p=2675941#p2675941

Please carry Navic related posts here ..

@Tanaji I responded to your post there.

Amber G.

xpost(s) for clarity: Is there an estimate on how many satellites in LEO orbit would be required to have at least 5 satellites overhead the Indian landmass at any given time? It would be interesting to see how the economics stacks up this way as opposed to geosats. Is there an estimate on how many s...

Amber G.

. Trump admin needs a face saver to get out, but communicating that seems to be a problem.

We had an attack. 100 missiles were shot by Iran at a very important thing that we had. I won't tell you what it was for certain reasons, says Trump <video>

Amber G.

@sridharji I responded to your post at viewtopic.php?p=2675950#p2675950

Amber G.

NavIC: India’s “jinxed” navigational program, or a cornerstone of India’s misplaced space priorities? - Ajay Lele, The Space Review India’s NavIC (Navigation with Indian Constellation) is a regional satellite navigation system developed to provide accurate positioning, navigation, and timing (PNT) ...

Amber G.

Sharing a piece which I wrote some time ago (my SM) See links for various newspaper articles (Economic Times, GPS World, Deccan Herald) and other resources in the end Big picture -India’s NavIC is facing a temporary capability drop mainly due to atomic clock failures on multiple satellites, most rec...

Amber G.

NavIC: Degraded, Not Dead — A Technical Look at India’s Navigation System Starting a new thread - Hopefully with Bradmin's Blessing. There’s been a lot of noise lately around “NavIC is dead.” That framing is neither technically accurate nor particularly useful. Let’s step back and look at what’s ac...

Amber G.

MY TAKE: On the "NavIC is Dead" Rhetoric (IMO, honest/blunt) Claiming NavIC is "DEAD" because of a replenishment delay is like channeling Rahul Gandhi (Really!) ' the Indian economy is dead " narrative—it’s loud rhetoric fueled by an ignorance of basic facts. A system under ...

Amber G.

A quick note to the broader audience: After 50 years in academia teaching and mentoring the next generation, my tolerance for bad math is low, but my enthusiasm for sharing actual knowledge is infinite. The math and physics I've outlined above are for anyone here who values rigorous education over r...

Amber G.

FWIW Summary of some items in media - centered on claims that Vice President JD Vance is traveling to Pakistan this weekend for peace talks. They argue that Iran has "veto power" over U.S. personnel, specifically rejecting negotiators like Steve Witkoff and Jared Kushner due to a "def...

Amber G.

xpost: ' Masterpiece use of word 'Dalal' by EAM! Jaishankar On Pakistan Brokering US Iran Deal: 'India Is Not A Dalal Country Like Pakistan' India has mocked Pakistan's attempt at mediation in the Middle East war, using the strongest of languages to refer to Islamabad as it seeks a role in global di...

Amber G.

I actually never had the chance to meet Sivaji Ganesan. In fact, I grew up knowing very little about film personalities, even in Hindi cinema before I met them (this family through my classmate). I only later learned what a truly legendary actor he was! What I found most remarkable was that, while t...

Amber G.

Meanwhile it is morning in Washington DC, & Trump posted first comments on Iran. Believes in 'great military achievement in Iran' https://pbs.twimg.com/media/HERGfb0a4AATSKT?format=jpg&name=small And " Resounding military triumph" , White House Spox Karoline Leavitt claims on US si...

Amber G.

Reports one hour old as I type this suggest most of the talk of negotiations, Pakistan, etc., are not correct. This includes for the US, London, Israel and Dubai. It could be the fog of war, intensified by the fog of Trump. This seems to be Trump suggestions and attempt by Trump. Iranians seems not...

Amber G.

Meanwhile checking on - Ernest Moniz (Former U.S. Energy Secretary) Moniz is currently serving as a frequent media analyst and advisor, focusing on the global energy crisis and nuclear escalation resulting from the 2026 strikes. In March 2026, Moniz has appeared on CNN, Bloomberg TV, and ABC News t...

Amber G.

Thanks for this informative post. Is Saleji still alive? Edited ; More info and links. Salehiji , while officially retired from the top nuclear post, has been vocal! (Slightly surprised) Was able to easily check - before the war intensified, Salehi shifted his focus to Quantum Technology, leading I...

Amber G.

x posting some items .. ^^^. Former UK Ambassador drops a massive truth bomb: Iran was observing the 2015 nuclear deal to the letter. Trump sabotaged it purely on Israeli advice, and the claims that Iran was cheating are absolute lies debunked by the International Atomic Energy Agency. <video> Gemin...

Amber G.

All — the situation is becoming increasingly serious from a nuclear perspective, given the involvement of the U.S., Israel, Iran, and now Pakistan. Not all actors here can be assumed to behave in strictly rational ways, which makes the risks harder to bound. I’d value thoughts from experts in this g...

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