gps

This article details a DIY build of a Stratum 1 PTP Grandmaster clock using a Raspberry Pi CM4 and GPS module for nanosecond-accurate time synchronization in industrial infrastructure, comparing it to costly commercial solutions.

Artist Justin Blinder created 'Ground Truth,' a device that adjusts bike pedaling resistance based on housing affordability in neighborhoods using data from the American Community Survey to physically experience economic inequalities.

An art project called Ground Truth attaches to Citi Bikes and uses GPS and census data to add resistance when riding through rent-burdened neighborhoods, making the housing crisis tangible.

A Wired guide to the best personal safety alarms for 2026, including Garmin, Sabre, and She's Birdie, with testing methodology and recommendations.

Discusses the impact of CoCom regulations on GPS receivers used in balloons and cubesats, affecting export controls and technology deployment.

Evidence suggests the U.S. military has been using a hidden 176-bit slot in public GPS signals to broadcast encrypted cryptographic keys for nearly 20 years, effectively turning GPS satellites into global numbers stations.

Halter's AI-powered collars for cows enable virtual fencing and health monitoring, using GPS and sensors to manage herds remotely and detect illnesses early, now deployed on over 1 million cattle.

An article from Inside GNMS describing how GPS broadcasts a mysterious numbers station-like signal from what appeared to be an empty field.

A detailed write-up of an abandoned project to build a 'fake' GPS module that obtains time over WiFi using NTP and an ESP8266, aiming for sub-millisecond accuracy but ultimately falling short due to hardware limitations.

This paper introduces TransitLM, a large-scale dataset of over 13 million transit route planning records from Chinese cities, enabling map-free route generation via LLMs trained directly on planning data.

An interactive article breaks down how GPS works—from turning nanosecond signal delays into distance, to trilateration with satellites, and even Einstein’s relativistic corrections.