On 21st September 2017 Thursday West coast time, is the United Launch Alliance of NROL-42- National Reconnaissance Office Satellite, launching from the West Coast Californian coast line from Launch Complex three from Vandenberg Air Force Base… The launch window of the Atlas V 541 opens at 2238 hours Pacific Date Time…in which the live stream of the event will be stream broadcast at Sept. 21 at 2218 Hours Pacific Date Time in which will be a night time launch due to the nature of the position of the payload need to be placed.
The client is the National Reconnaissance Office Launch Enterprise- Air Force, in which the NROL-42 is launch from an Atlas V 541 configuration, in which the primary stage is an Atlas V, with four core solid rocket boosters, in which the primary carrier stage is powered by a RD-180 Engine, with a secondary Centaur Stage is powered by a Areojet Rocketdyne RL10C-1 Engine..
The NROL-42- is a Data observationally data gathering communications assessment satellite in which one of many purposes is also assessments of weather observation also earth environmental sciences of data analysis natural disasters, earthquakes, tsunamis, flooding’s, and fires… also provides the provisions of communications of supporting peacekeeping and humanitarian relief operations