[Launch Alert] Launch Time Announced

[Launch Alert]

The following is a media update from the United Launch Alliance (ULA). Please direct all questions and comments regarding this update to the ULA.


Subject: Media Update: ULA Atlas V NROL-42 Launch Set for September 23
Date: Sep 22, 2017 4:27 PM

Good afternoon – the ULA Atlas V rocket carrying the NROL-42 mission for the National Reconnaissance Office is confirmed on the Western Range for Saturday, Sept. 23. The launch time is 10:30 p.m. Pacific. The battery replacement is on schedule and the ULA and customer teams are ready to support this new launch date. Today’s L-1 weather forecast continues to show 80% favorable conditions for launch.
 
Launch Day Forecast
Overall probability of violating weather constraints: 20%
Areas of concern: Launch Visibility
 
Overall probability of violating weather constraints for 24 Hour Delay: 10%
Areas of concern: Launch Visibility
 
Launch Broadcast Satellite Coordinates + Webcast
 
LAUNCH – SEPTEMBER 23, 2017                                     
BARS AND TONE – 9:39 P.M.
PROGRAM START – 10:10 P.M.
 
TRANSMISSION FOR DIGITAL HIGH DEFINITON
SATELLITE: SES 3
TRANSPONDER: 24
BAND: C-Band Digital
ORBITAL POSITION: 103 degrees west
HD BANDWIDTH: 18 MHz (Half Transponder ‘CD’)
UPLINK FREQ: 6,414.000 MHz (Horizontal)
DOWNLINK FREQ: 4,189.000 MHz (Vertical)
SYMBOL RATE: 13
FEC: ¾
DATA RATE: 17.9705
DVBS-QPSK
MPEG-2
AUDIO EMBEDDED
 
WEB CAST AVAILABLE AT: http://www.ulalaunch.com   and www.youtube.com/unitedlaunchalliance