Backwards sundial makes useful compass

• Autores: Jacob Aron
• Localización: New scientist, ISSN 0262-4079, Nº. 3033, 2015, pág. 13
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Existing solar compasses, based on 19th-century technology, aren't very accurate. So Daniele Murra of the Italian National Agency for New Technologies, Energy and Sustainable Economic Development in Rome and his team who built the compass, turned to a digital camera fitted with a slit lens to measure the angle of the sun in the sky. By combining this with a GPS sensor that provides the location and time, the compass can calculate the relative positions of the sun and Earth, and tell you which way is north.