C'était la bonne idée de mettre à jour mon #Fairphone Gen 6 alors que je suis au #Québec. J'ai le bug du redémarrage en boucle maintenant. Je dois couper mon #GPS pour qu'il soit un peu utilisable.

L’avion d’Ursula von der Leyen victime d’un "brouillage GPS" en Bulgarie, la Commission européenne soupçonne la Russie. Le pilote est parvenu à atterrir à l’aéroport de Plovdiv en utilisant une carte papier, selon le Financial Times. On se croirait dans un James Bond! https://www.ft.com/content/3c330f87-71c4-4db9-8259-f5c132c1f0d3

#Politique#GPS#Aviation#Russie#Europe#UE#Transport#AlloHouston

L’avion d’Ursula von der Leyen victime d’un "brouillage GPS" en Bulgarie, la Commission européenne soupçonne la Russie. Le pilote est parvenu à atterrir à l’aéroport de Plovdiv en utilisant une carte papier, selon le Financial Times. On se croirait dans un James Bond! https://www.ft.com/content/3c330f87-71c4-4db9-8259-f5c132c1f0d3

#Politique#GPS#Aviation#Russie#Europe#UE#Transport#AlloHouston

I built a more accurate Galactic GPS for aliens to find us!

In the 1970s, the Pioneer and Voyager spacecraft were launched into deep space - each carrying a message from Earth in the form of plaques and golden records. These included a now-famous diagram: the pulsar map, originally proposed by Carl Sagan, Linda Salzman Sagan, and Frank Drake.

It uses the positions and spin periods of 14 pulsars to show where we are in the galaxy, effectively a cosmic return address.

But there’s a catch: the original map used canonical pulsars, which we now know can glitch and show timing instabilities. Back then, millisecond pulsars hadn’t yet been discovered (they came in the early '80s), so they weren’t included.

As someone studying millisecond pulsars and their long-term timing stability for my PhD, I decided to write some code to rebuild this iconic map - with a little upgrade.

Enter: the Millisecond Pulsar Map.

This version features:

- A top-down view of the Galaxy, with a central measuring bar showing our distance (8 kiloparsecs) from the Galactic Centre.
- Radial lines showing the distance to each millisecond pulsar. These can be measured against the central measuring bar to work out this distance
- Binary encodings for each pulsar's spin period and spin-down rate. These parameters will remain much more stable over the long term.
- A decoding scale to interpret the binary inscriptions.

With 40+ years of high-precision timing data, millisecond pulsars are far more stable than their slower cousins - making them ideal for building a map that could stand the test of cosmic time.

This also highlights how millisecond pulsars could be used as an intergalactic GPS network (because these stable pulsars are like cosmic clocks distributed across the sky). This might be an application for future spacecraft to navigate around the Solar System. Have a read of this article for how we are already building this technology now: https://www.spaceaustralia.com/feature/breaking-free-shackles-terrestrial-time

So, if some distant civilisation stumbles upon this new pulsar map ... well, they’ll know exactly where to find us.

The question is: do we really want to leave our full galactic home address out there?!

#Pulsars#RadioAstronomy#Astrophysics#GPS #Astrodon

I built a more accurate Galactic GPS for aliens to find us!

In the 1970s, the Pioneer and Voyager spacecraft were launched into deep space - each carrying a message from Earth in the form of plaques and golden records. These included a now-famous diagram: the pulsar map, originally proposed by Carl Sagan, Linda Salzman Sagan, and Frank Drake.

It uses the positions and spin periods of 14 pulsars to show where we are in the galaxy, effectively a cosmic return address.

But there’s a catch: the original map used canonical pulsars, which we now know can glitch and show timing instabilities. Back then, millisecond pulsars hadn’t yet been discovered (they came in the early '80s), so they weren’t included.

As someone studying millisecond pulsars and their long-term timing stability for my PhD, I decided to write some code to rebuild this iconic map - with a little upgrade.

Enter: the Millisecond Pulsar Map.

This version features:

- A top-down view of the Galaxy, with a central measuring bar showing our distance (8 kiloparsecs) from the Galactic Centre.
- Radial lines showing the distance to each millisecond pulsar. These can be measured against the central measuring bar to work out this distance
- Binary encodings for each pulsar's spin period and spin-down rate. These parameters will remain much more stable over the long term.
- A decoding scale to interpret the binary inscriptions.

With 40+ years of high-precision timing data, millisecond pulsars are far more stable than their slower cousins - making them ideal for building a map that could stand the test of cosmic time.

This also highlights how millisecond pulsars could be used as an intergalactic GPS network (because these stable pulsars are like cosmic clocks distributed across the sky). This might be an application for future spacecraft to navigate around the Solar System. Have a read of this article for how we are already building this technology now: https://www.spaceaustralia.com/feature/breaking-free-shackles-terrestrial-time

So, if some distant civilisation stumbles upon this new pulsar map ... well, they’ll know exactly where to find us.

The question is: do we really want to leave our full galactic home address out there?!

#Pulsars#RadioAstronomy#Astrophysics#GPS #Astrodon

L’incroyable précision des horloges atomiques

Elles sont peu connues, et pourtant les horloges atomiques sont indispensables aussi bien à nos télécommunications qu’au #GPS. Elles servent aussi à tester des théories fondamentales de la physique. Et leurs prochaines applications sont encore plus impressionnantes.

Par Cécile Michaut › https://www.mediapart.fr/journal/culture-et-idees/030825/l-incroyable-precision-des-horloges-atomiques?at_medium=rs-cm&at_campaign=mastodon&at_account=mediapart

🌍 Volevo segnalare wanderer, una web app relativamente giovane che permette di caricare tracce #GPS registrate o crearne di nuove e aggiungere #metadati per costruire un catalogo facilmente ricercabile.

https://wanderer.to

E' hostabile in proprio, non c'è nessun tracciamento e supporta #ActivityPub per la sua integrazione nel #fediverso

@lealternative @opensource

🌍 Volevo segnalare wanderer, una web app relativamente giovane che permette di caricare tracce #GPS registrate o crearne di nuove e aggiungere #metadati per costruire un catalogo facilmente ricercabile.

https://wanderer.to

E' hostabile in proprio, non c'è nessun tracciamento e supporta #ActivityPub per la sua integrazione nel #fediverso

@lealternative @opensource

Un bar, et un service de vidéo 24h/24 à cet endroit ?
Mais y'a RIEN à cet endroit, c'est un CHEMIN DE TERRE ENTRE UN CHAMP ET UNE AUTOROUTE (!)
Mais d'où ils sortent ces données ? C'est bizarre.
Elles ne sont absolument pas dans OpenStreetMap.

Ou alors ils empoisonnent leurs cartes pour prouver les vols de données.

The subtitle icons themselves function as buttons, which re-direct to a note that is generated via a template containing a geomap widget, and the coordinates as the note title, stored when either of the two ViewToolbar buttons is pressed.

#tiddlywiki #digitalgarden #gps #geolocation #notetaking #personalwiki

Now the subtitle—in addition to showing the timestamps—contains a location pin icon for the origin GPS coordinates, and a globe icon for the last modified version GPS coordinates.

These are set manually, just to keep things more intentional and optimized, via two new ViewToolbar buttons: fetch current coordinates (for the most recent coordinates) … and set created coordinates, which will populate fields for a tiddler's origin coords.

#tiddlywiki #digitalgarden #gps #geolocation #notetaking

Planes are having their GPS hacked. Could new clocks keep them safe?

https://www.bbc.com/news/articles/cq6yg204pvmo

#news #tech #technology #security #privacy #gps