Matosinhos Barranha Portugal
4460-432 Matosinhos Barranha
Avenida Vasco da Gama
Portugal
14 december 2007
| date | city | lat. (°’) | lat.(dec) | gnomon | shadow | angle (°’) | angle (dec) |
| 14 dec | Lafranç. | +44°08’ | +44,13° | 100 cm | 239 cm | +67°17’ | +67,28° |
| 14 dec | Barranha | +41°19′ | +41,32° | 27,3 cm | 55,7 cm | +63°54’ | +63,90° |
Lafrançaise-Barranha
| Angle difference | 67,28-63,90 = 3,38° |
| Distance | 313 km |
| Circumference of the Earth | 313x360/3,38 = 33337km |
perbosc
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