We went into mission mode for 'Mission Shakti' 6 months ago: DRDO chairman
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The chairman of DRDO has said that A-SAT is not a derivative of Prithvi missile and this is a brand new missile developed by DRDO. He said the missile has technologies used in it that were developed for ballistic missile defence application and it has a range up to 1000 km, targeting all 'low-earth orbit' satellites. The development started a few years back, and we went into mission mode in the last six months.