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A new idea is insinuating in social networks and programming communities. It’s the proportionality between the money people give you for coding something, and the level of demand for quality they can claim to have about your work. As somebody said, the best code is written w...

Welcome to part 3 of my series on OSNMA, the proposed Galileo Navigation Message Authentication protocol. This part can be read independently from part 1 and part 2, but it might be useful to read the introduction to part 1. This post attempts to explain GPS (GNSS) jamming and spoofing, so it might be a useful read even if you don’t care about Galileo or its authentication. As usual, I’ve been helped tremendously by Daniel Estévez & many other researchers and Galileo professionals, and again I am very greatful for all the links, corrections, suggestions and knowledge you provided.

We horen veel over hoeveel mensen er nu besmet raken met COVID-19. Tegelijk viel het tot begin oktober erg mee met de ziekenhuisopnames en sterfgevallen. Ik kan ook niet verklaren hoe dat precies komt (het is niet alleen leeftijd), maar ik wil het in dit artikel wel hebben over “de zonlichtvitamine”, vitamine D. Want nu in september hebben we net een zomer lang zon gehad, en in maart kwamen we vers uit de winter.

Rust in 2021 should focus on discoverability

with an essay on sidenotes; links on human competence, efficient-computing/hardware-overhangs; no reviews.

Recapping from part 1: Galileo will soon add cryptographic signatures to the navigation messages. These cryptographic signatures are made with symmetric cryptography, which means clever techniques are required to prevent receivers from impersonating the network. The key to the technique is first signing messages, and only later disclosing the key used for the signatures, thus invalidating it for further use. Receivers can however verify that earlier signatures were indeed made with that key.

Links on the Uighurs, authoritarianism, negative emissions, AI overhang; 1 movie & 2 anime reviews

I hate to use a smartphone. Being able to view maps, look up info on the go and listen to music is great, but I always felt that smartphones are like plastic utensils. Very useful on the go, but temporary in nature. A compromise. Using a smartphone for more than a few minute...

Position, velocity and time (PVT) information can be a ’nice to have’, but in other circumstances knowing place and time has legal or military importance as well. Heavy vehicles for example are typically outfitted with tachographs that track driver speed and/or location. This has importance for rest regulations, but also to check if loads are actually from where they say they are. Our Global Navigation Satellite Systems so far are broadcasting unauthenticated data, at least to civilian users.

Reflections on 50 days of meditation

Toch weer een kleine Corona-update, vrij snel na de vorige van 1 juli. Want poeh, gaat het nou ineens weer mis in Nederland? Of valt het mee? Moeten we allemaal aan de maskers en komt het dan goed? En gaan de vaccins en medicijnen ons redden voor de winter? In tegenstelling tot vele roeptoeters heb ik daar ook allemaal geen zekere antwoorden op, maar hier toch een set updates over de meest recente ontwikkelingen.

At first I cycled up the hill with all my force trying to impress the world. My athletic sweat was the only thing that showed the effort. My face was trying to do the opposite, to convince the unseen viewer that the ascent is effortless, easy even. Then I started noticing it...

GPS, GLONASS, Galileo, BeiDou (Global Navigational Satellite Systems, GNSS) are miracles of engineering. And within any complex system hide surprises and unsuspected complications. In this post I go over how we resolved an odd observation: that everyone (including major institutions) reported that one of the Galileo satellites (E24) appeared to be off by 1.5 meters, while actual positioning equipment (like phones) showed no problems at all. Through the explanation, we’ll casually learn a thing or two about the cool concept of multi-frequency GNSS.

Come waste your time with me.

Hi everyone, Disclaimer: this is a review of a free sample I got sent by Uputronics. I recently spotted on Twitter that Uputronics had launched a GPS/RTS Raspberry Pi Expansion Board, and that they were looking for worthy projects to test it. I thought our Galileo/GPS/BeiDou/GLONASS monitoring project galmon.eu might be worthy and Uputronics agreed. Relevant for our purposes, this is an actual ’timing receiver’. Any GNSS chip will get you a location, but some of them go the extra mile to also deliver a very stable clock signal.

From the desk of Eric Migicovsky Edit : Interested in what you read below? Check out  Beeper , an app that we built to solve this problem…

I have a longer story brewing, but in this post I want to briefly announce the “Galmon.eu unofficial Weekly Performance Report”. This is a blog post version of an earlier Twitter thread. I’m very proud to present the first full Galmon.eu Weekly Galileo Report! And the good news is: it was a good week with very little to report. The email has just gone out, but you can also find it here.

June 2020 gwern.net newsletter with 3 new pages/essays, and links on CRISPR, population screening, AI scaling, politics, and technological unemployment.

Nu het RIVM gestopt is met dagelijkse updates vond ik dat het tijd was dat gat dan maar te vullen, al is het maar voor een dag. Een nieuwe Corona Update “hoe gaat het nu met”. De vorige was alweer van 21 april! De “Ik ben geen expert, maar toch”-factor Een boel dansleraren en opiniepeilers zijn inmiddels COVID-19 experts. In deze post heb ik erg mijn best gedaan alleen dingen te melden die we heel zeker weten.