# Immaterials: Satellite Lamps

> Satellite Lamps reveals the invisible accuracy of GPS positioning across an urban landscape. Three lamps with built-in GPS receivers vary their brightness depending on signal accuracy.

- Page: https://www.elasticspace.com/2014/08/immaterials-satellite-lamps/
- Author: Timo Arnall (https://www.elasticspace.com/)
- Section: Films (https://www.elasticspace.com/films/)
- Published: 2014-08-20
- Updated: 2026-07-04
- Tags: GPS, Infrastructure, Light Painting, Long Exposure, Slow, AHO
- Site map for agents: https://www.elasticspace.com/llms.txt

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Video: [Immaterials: Satellite Lamps](https://vimeo.com/97054557)

Satellite Lamps reveals the invisible accuracy of GPS positioning across an urban landscape. Three lamps with built-in GPS receivers vary their brightness depending on signal accuracy, photographed over time to build a picture of how these signals behave in actual urban spaces.