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南 京 工 程 學(xué) 院 畢業(yè)設(shè)計(jì)說明書 (論文 ) 作 者: * * * 學(xué) 號(hào): * * * 系 部:
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一. GPS 天線安裝位置選擇 * CUSTOMER SUPPLIED SKY A 2 m 90? PROTECTE DCIRCULAR CONE ANTENN A A * LIGHTNINGRO D * MAST 30? OBSTRUCTIO N(BUILDING orSITE RELIEF) 2m FROM METALLIC OBJECTGREATER THAN 20cm IN ANY DIMENSION * GROUNDING CONDUCTOR * HOUSING 1 EMP PROTECTOR PROTECTED AREA UNPROTECTED AREA(SHORT DISTANCE) 2 CABLE LENGTH = + 1 2 GPS RECEIVER UNIT * 1 - 1/2 " COPPER STRAP5m LONG * GROUND