Launch day overall probability of violating weather constraints: 20%Primary concern(s): Cumulus Clouds24-hour delay overall probability of violating weather constraints: 20%Primary concern(s): Cumulus Clouds
Quote from: Skyrocket on 10/20/2015 01:00 pmThe interesting thing is, that this time an Atlas-V(411) instead of the Atlas-V(401) was orderedSBIRS-GEO has either gained some additional mass or an different orbital injection profile will be used.https://govtribe.com/project/ja-15-37-for-space-based-infrared-systems-sbirs-geo-flight-4-launch-servicesIt's possible the extra SRB is for increased performance to allow the Centaur to fully de-orbit into the ocean.
The interesting thing is, that this time an Atlas-V(411) instead of the Atlas-V(401) was orderedSBIRS-GEO has either gained some additional mass or an different orbital injection profile will be used.https://govtribe.com/project/ja-15-37-for-space-based-infrared-systems-sbirs-geo-flight-4-launch-services
For prior missions, this customer preferred to place the expended Centaur in the designated disposal orbit (junkyard, from which stages slowly decay into reentry). On this flight, the SRB provides enough energy to allow Centaur to be immediately deorbited.
The U.S. Air Force is ready to launch the 4th SBIRS Geosynchronous Earth Orbit satellite on 18 January 2018 #spacestartshere
United Launch Alliance’s Atlas 5 rocket is on the move toward Cape Canaveral’s Complex 41 launch pad. The rocket is rolling out ahead of launch with a US Air Force satellite Thursday night. https://spaceflightnow.com/2018/01/17/av-076-mission-status-center/ …
They're adding the cost/complexity of an SRB just to be able to de-orbit the upper stage faster? What is the reason for that? Is this new policy, to be able to target specific disposal areas?
Quote from: Norm38 on 01/17/2018 02:09 pmThey're adding the cost/complexity of an SRB just to be able to de-orbit the upper stage faster? What is the reason for that? Is this new policy, to be able to target specific disposal areas?I’d turn the question around and ask what is wrong with taking the responsible course of action, especially if anyone knows about the growing clutter in orbit it’s the USAF.
The Atlas 5 rocket has arrived at its launch pad at Cape Canaveral ahead of liftoff Thursday evening with a US Air Force missile-warning satellite. There is a 90% chance of favorable weather for launch. spaceflightnow.com/2018/01/17/av-…
GEO Flight-4 has rolled out to the launch pad today at Cape Canaveral Air Force Station. The…https://www.instagram.com/p/BeD7aymHdYo/
Beautiful evening at @ulalaunch Space Launch Complex 41, where an Atlas V 411 rocket is poised to launch the @usairforce SBIRS GEO-4 satellite tomorrow night at 7:52pm. Photo: @johnkrausphotos / @AmericaSpace.