pdx-sfo-sba_100.JPG : 無料・フリー素材/写真
pdx-sfo-sba_100.JPG / dsearls
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | KGO's three towers stand in algae-green salt evaporation ponds beside the causeway to the Dumbarton Bridge. Salt water has the highest ground conductivity on Earth, and the extra-high concentrations under KGO's towers give it perhaps the best ground system in AM broadcasting. Its 50,000-watt signal has a figure-eight pattern pointing up the bay toward San Francisco and down the bay toward San Jose. But the head start the signal gets by travelling across the world's most conductive ground in part accounts for the station's city-grade coverage from Chico to Big Sur. Bonus link. |
| 撮影日 | 2006-07-27 19:41:48 |
| 撮影者 | dsearls , Santa Barbara, USA |
| タグ | |
| 撮影地 | |
| カメラ | Canon EOS 30D , Canon |
| 露出 | 0.006 sec (1/160) |
| 開放F値 | f/6.3 |
| 焦点距離 | 119 mm |