dimanche 2 août 2020

Astronauts Wake Up, Prep Crew Dragon For Splashdown Today













NASA & SpaceX - First Crewed Flight DM-2 patch.

August 2, 2020

Crew Dragon atmospheric reentry. Animation Credit: NASA

NASA astronauts Robert Behnken and Douglas Hurley are beginning their final day in orbit inside the Crew Dragon “Endeavour” spacecraft ahead of splashdown in the Gulf of Mexico at 2:48 p.m. EDT this afternoon.


Image above: SpaceX’s first Crew Dragon parachutes to a splashdown in the Atlantic Ocean during the uncrewed Demo-1 mission on March 8, 2019. Image Credit: NASA.

NASA’s live coverage of the return continues: http://www.nasa.gov/live

To wake them, Mission Control Hawthorne played the dads an audio message from  their sons.

Conditions remain “Go” at the primary targeted site, off the coast of Pensacola, and alternate site off the coast of Panama City in the Gulf of Mexico for splashdown and recovery.

Here’s the timeline for return activities (all times Eastern):

1:51 p.m. – Crew Dragon performs claw separation. The claw is located on Crew Dragon’s trunk, connecting thermal control, power, and avionics system components located on the trunk to the capsule.

    1:51 p.m. – Trunk separation
    1:56 p.m. – Deorbit burn begins
    2:08 p.m. – Deorbit burn complete
    2:11 p.m. – Nosecone deploys
    2:32 p.m. – Crew Dragon maneuvers to attitude for re-entry

    2:44 p.m. – Drogue parachutes deploy at about 18,000 feet in altitude while Crew Dragon is moving approximately 350 miles per hour.

    2:45 p.m. – Main parachutes deploy at about 6,000 feet in altitude while Crew Dragon is moving approximately 119 miles per hour.

    2:48 p.m. – Splashdown

Crew Dragon autonomously undocked from the International Space Station’s Harmony module at 7:35 p.m. Saturday, two very small engine burns separating Crew Dragon from the station, and the spacecraft slowly maneuvered away from the orbital laboratory. Once flying free, Dragon Endeavour autonomously executed four departure burns that moved the spaceship away from the space station and the crew began the flight home. A phasing burn overnight put it on its path toward Pensacola.

The duo arrived at the orbiting laboratory on May 31, following a successful launch on May 30 on a SpaceX Falcon 9 rocket from NASA’s Kennedy Space Center in Florida. During their 62 days aboard station, Behnken and Hurley contributed more than 100 hours of time to supporting the orbiting laboratory’s investigations, participated in public engagement events, and supported four spacewalks with Behnken and Cassidy to install new batteries in the station’s power grid and upgrade other station hardware.

Related articles:

Endeavour Spacecraft Undocked from Station
https://orbiterchspacenews.blogspot.com/2020/08/endeavour-spacecraft-undocked-from.html

NASA’s SpaceX Demo-2: Weather Remains ‘GO’ for Return, Live Coverage Today
https://orbiterchspacenews.blogspot.com/2020/08/nasas-spacex-demo-2-weather-remains-go.html

Astronauts Talk to Press on Friday Before Crew Dragon Departure
https://orbiterchspacenews.blogspot.com/2020/07/astronauts-talk-to-press-on-friday.html

NASA, SpaceX Preparing For Crew Return
https://orbiterchspacenews.blogspot.com/2020/07/nasa-spacex-preparing-for-crew-return.html

Top 10 Things to Know for NASA’s SpaceX Demo-2 Return
https://orbiterchspacenews.blogspot.com/2020/07/top-10-things-to-know-for-nasas-spacex.html

Related links:

Splashdown weather criteria fact sheet: https://www.nasa.gov/sites/default/files/atoms/files/ccp_splashdown.pdf

Commercial Crew Program: https://www.nasa.gov/exploration/commercial/crew/index.html

International Space Station (ISS): https://www.nasa.gov/mission_pages/station/main/index.html

Image (mentioned), Animation (mentioned), Text, Credits: NASA/Mark Garcia.

Greetings, Orbiter.ch