пятница, 20 декабря 2019 г.

Tune in for Launch Coverage of Boeing’s Orbital Flight Test

Boeing & NASA - Orbital Flight Test (OFT) patch.

December 19, 2019

Liftoff of Boeing’s CST-100 Starliner spacecraft atop a United Launch Alliance Atlas V rocket, is targeted for 6:36 a.m. EST Friday, Dec. 20 from Space Launch Complex 41 on Cape Canaveral Air Force Station in Florida. This uncrewed mission, known as Boeing’s Orbital Flight Test, is Starliner’s maiden flight to the International Space Station for NASA’s Commercial Crew Program. The main objective of the mission is an end-to-end demonstration of Boeing’s ability to launch astronauts to the orbiting laboratory and return them home. To learn more, read the prelaunch feature.

Meteorologists with the U.S. Air Force 45th Weather Squadron continue to predict an 80% chance of favorable weather for launch on Friday morning. Primary concerns for launch day are the Cumulus Cloud Rule and User Ground Winds violations during the instantaneous launch window.

Image above: The crew access arm is seen after being moved into position for Boeing’s CST-100 Starliner spacecraft atop a United Launch Alliance Atlas V rocket on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The Orbital Flight Test with be Starliner’s maiden mission to the International Space Station for NASA’s Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system’s capabilities. Photo Credits: NASA/Joel Kowsky.

Join us at 5:30 a.m. EST Friday, Dec. 20, for countdown coverage on the Commercial Crew blog and NASA TV.

NASA will host an Administrator Post-launch News Conference at 9 a.m. followed by a Launch Team News Conference at 9:30 a.m., both on NASA TV.

Mission Timeline (all times approximate)

Hour/Min/Sec           Events
-06:00:00              Atlas V fueling commences
-04:05:00              Atlas V fueling is complete
-04:04:00              T-4 minute built-in hold begins
-01:25:00              Hatch closure complete
-01:15:00              Prelaunch cabin leak checks
-01:05:00              Cabin pressurization complete
-00:20:00              Launch Conductor conducts terminal count briefing
-00:18:00              CST-100 poll for terminal count
-00:15:00              CST-100 to internal power
-00:10:00              Crew Access Arm retracted
-00:08:00              Launch vehicle poll for terminal count
-00:04:45              Starliner configured for terminal count
-00:04:00              T-4 minute built-in hold releases
-00:01:00              CST-100 is configured for launch
-00:00:03              RD-180 engine ignition

Launch, Landing and CST-100 Deployment (all times approximate)

Hour/Min/Sec          Events
+00:00:01             Liftoff
+00:00:06             Begin pitch/yaw maneuver
+00:00:41             Maximum dynamic pressure
+00:01:05             Mach 1
+00:02:22             SRB jettison
+00:04:29             Atlas booster engine cutoff (BECO)
+00:04:35             Atlas Centaur separation
+00:04:41             Ascent cover jettison
+00:04:45             Centaur first main engine start (MES-1)
+00:05:05             Aeroskirt jettison
+00:11:54             Centaur first main engine cutoff (MECO-1)

Related articles:

Astronauts “Train Like You Fly” in Boeing Starliner Simulations

Boeing Flight Test for Commercial Crew Program Will Pave the Way for Future Science

Boeing and NASA Approach Milestone Orbital Flight Test

Related links:

NASA TV: https://www.nasa.gov/nasalive

Atlas V rocket: https://blogs.nasa.gov/commercialcrew/tag/atlas-v-rocket/

Boeing: https://blogs.nasa.gov/commercialcrew/category/boeing/

Commercial Crew Program: https://www.nasa.gov/commercialcrew

International Space Station: https://www.nasa.gov/station

Commercial Crew blog (NASA): https://blogs.nasa.gov/commercialcrew/

Image (mentioned), Text, Credits: NASA/Linda Herridge.

Best regards, Orbiter.ch

* This article was originally published here

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