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DLR12 个月
G-sextant
Within the context of the Copernicus (former GMES) Initiative, the FP 7 project G-SEXTANT aims at consolidating a portfolio of Earth Observation products and services that support the geospatial ...
But how did our ancestors manage to navigate the high seas and discover new lands without modern technology? Discover some of ...
There's nothing mystical or complicated about a sextant. All it is is a device that measures the angle between two objects. The sextant makes use of two mirrors. With this sextant, one of the ...
There's no way around it: Celestial navigation using a sextant is a complex and involved process that involves a fair amount of calculating, correcting, referring to tables, knowledge of the ...
Polished brass sextant, diamond-pattern frame type, with polished brass limb wooden handle and threaded hole for stand with shaped mahogany case by Troughton and Simms, Fleet St., City of London, ...