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Line 168: On 16 May 2015, a [[Mexican Satellite System\|MEXSAT]] communications satellite failed to orbit due to another third stage malfunction, the eighth Proton failure since 2010. == Phase IV === Khrunichev has initiated development of a set of phase IV enhancements in order to keep pace with market demands and the mass growth trends of commercial satellites. The implementation of Phase IV Proton Briz-M enhancements were completed in 2016. The payload mass performance for phase IV has been increased to 6320 kg to a reference GTO orbit with 1500 m/s of residual [[delta V]] to GSO.<ref name="ilslaunch4">{{cite web\|url=http://www.ilslaunch.com/launch-services/ils-proton-breeze-m-launch-vehicle/proton-heritage\|title=Commercial Launch Heritage \| Proton Rocket \| International Launch Services\|publisher=ilslaunch.com\|access-date=13 September 2014}}</ref>

Proton (rocket family): Difference between revisions