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Two types of sub-bottom profiler are manufactured. These are “chirp” and active (pulsed) continuous wave systems. Chirp sub-bottom profilers offer greater bottom penetration than continuous wave systems and are superior to seismic systems in terms of range resolution and reduced ensonification. For example, a chirp SBP mounted on an AUV can typically provide seafloor penetration of 5-100 metres, depending on bottom type, and a 10 cm range resolution while ensonifying an area less than 18 metres in diameter from an altitude of 50 metres. |
金蟲(chóng) (著名寫(xiě)手)
| 生產(chǎn)兩種類(lèi)型海底地層剖面儀。 它們分屬“線性調(diào)頻脈沖”系統(tǒng)和主動(dòng)(脈沖)連續(xù)波系統(tǒng)。 線性調(diào)頻脈沖海底地層剖面儀比連續(xù)波系統(tǒng)提供更強(qiáng)的底部穿透并且從距離分辨率和減少聲透射角度優(yōu)于慣性系統(tǒng)。 例如,一般來(lái)說(shuō),依海底類(lèi)型而定,安裝于一種自動(dòng)水下載具上的線性調(diào)頻脈沖海底地層剖面儀在聲穿透50公尺高度,直徑小于18公尺的面積時(shí)能夠提供5- 100公尺的海底穿透和10厘米的距離分辨率。 |
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