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Bomb damage assessment (BDA), also known as battle damage assessment, is the practice of assessing damage inflicted on a target from a stand-off weapon, most typically a bomb or air launched missile. It is part of the larger discipline of combat assessment. Assessment is performed using many techniques including footage from in-weapon cameras, gun cameras, forces on the ground near the target, satellite imagery and follow-up visits to the target. Preventing information on battle damage reaching the enemy is a key objective of military censorship. For nuclear weapons special techniques may be required due to the extensive damage caused and difficulty in approaching the site. ==History of bomb damage assessment== Originally, BDA was required due to the disconnected nature of aerial bombardment during World War I. It became necessary to send ground forces to an area to determine whether the damage was effective, or to overfly the target again. Either situation was difficult to accomplish safely. Starting with this conflict, specialized equipment has been used specifically for BDA type missions. Originally these were aircraft which were converted fighters or bombers (which in the USAAF were given a new ''RQ'' designation). Photographic reconnaissance was used extensively in World War II. From the 1950s onwards satellites became available, as well as high altitude surveillance planes such as the Lockheed U-2 and the Lockheed SR-71. BDA may be performed using information released accidentally by the enemy. In World War II, United Press International transmitted a report on the damage caused by the Japanese raid on Pearl Harbor including details on the number of damaged warships and shore installations. In more recent conflicts, special operations forces (SOF) have taken part in BDA, both through physical presence, and conducting overflies with equipment such as the RQ-4 Global Hawk UAV. The Israeli Defence Force includes two teams dedicated to both target designation and BDA. BDA was used during the two Gulf Wars, both during the conflict and retrospectively. In the opening days of the air campaign of the 1991 Gulf War it was used to assess the damage to key Iraqi installations including its nuclear reactors. At the conclusion of the 2003 invasion of Iraq a joint team from the allied nations (including Britain, the United States and Australia) assessed the damage caused to almost 400 sites across the country to determine the effectiveness of weapon strikes.〔(【引用サイトリンク】title=Cultural pursuit inspires Fellowship: Assessing bomb damage in Iraq )〕 As the field has advanced and the quantity of available data has increased, statistical techniques have been introduced to improve the speed and quality of data analysis. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「bomb damage assessment」の詳細全文を読む スポンサード リンク
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