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    Yemen: US Bombs Used in Deadliest Market Strike | Human Rights Watch
    ►https://www.hrw.org/news/2016/04/07/yemen-us-bombs-used-deadliest-market-strike

    Saudi Arabia-led coalition airstrikes using United States-supplied bombs killed at least 97 civilians, including 25 children, in northwestern Yemen on March 15, 2016, Human Rights Watch said today. The two strikes, on a crowded market in the village of Mastaba that may have also killed about 10 Houthi fighters, caused indiscriminate or foreseeably disproportionate loss of civilian life, in violation of the laws of war. Such unlawful attacks when carried out deliberately or recklessly are war crimes.

    Human Rights Watch conducted on-site investigations on March 28, and found remnants at the market of a GBU-31 satellite-guided bomb, which consists of a US-supplied MK-84 2,000-pound bomb mated with a JDAM satellite guidance kit, also US-supplied. A team of journalists from ITV, a British news channel, visited the site on March 26, and found remnants of an MK-84 bomb paired with a Paveway laser guidance kit. Human Rights Watch reviewed the journalists’ photographs and footage of these fragments.

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      Simplicissimus

      Ces petits bijoux, pilotés par GPS ("satellite guided") ont une précision (erreur circulaire probable) de 13 mètres (30 mètres en mode dégradé quand le signal GPS n’est pas disponible).

      Joint Direct Attack Munition (JDAM) GBU-31 - Smart Weapons
      ▻http://fas.org/man/dod-101/sys/smart/jdam.htm

      Once released, the bomb’s INS/GPS will take over and guide the bomb to its target regardless of weather. Guidance is accomplished via the tight coupling of an accurate Global Positioning System (GPS) with a 3-axis Inertial Navigation System (INS). The Guidance Control Unit (GCU) provides accurate guidance in both GPS-aided INS modes of operation (13 meter (m) Circular Error Probable (CEP)) and INS-only modes of operation (30 m CEP). INS only is defined as GPS quality hand-off from the aircraft with GPS unavailable to the weapon (e.g. GPS jammed). In the event JDAM is unable to receive GPS signals after launch for any reason, jamming or otherwise, the INS will provide rate and acceleration measurements which the weapon software will develop into a navigation solution. The Guidance Control Unit provides accurate guidance in both GPS-aided INS modes of operation and INS-only modes of operation. This inherent JDAM capability will counter the threat from near-term technological advances in GPS jamming.

      Simplicissimus
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