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出典:Wikipedia
出典:『Wikipedia』 (2011/05/31 15:42 UTC 版)
Differential Global Positioning System (DGPS) is an enhancement to Global Positioning System that uses a network of fixed, ground-based reference stations to broadcast the difference between the positions indicated by the satellite systems and the known fixed positions. These stations broadcast the difference between the measured satellite pseudoranges and actual (internally computed) pseudoranges, and receiver stations may correct their pseudoranges by the same amount. The correction signal is typically broadcast over UHF radio modem.
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the agency
a balance
the degree of difference
The difference is big.
(家屋のは)a house-agent―(地所のは)―a land-agent
1区分