IRS-1BRocket launchby RussiaLaunch time29 Aug 199106:48 UTCsuccessFinal flight of Vostok-2M 8A92M.MissionRocketPayloadsRocket Vostok2Mlaunched from Baikonur Cosmodrome, Pad 31/6KazakhstanPayloadsNamePurposeMassCommentIRS-1B---