Featured Research

from universities, journals, and other organizations

Dragon cargo craft launch scrubbed; Station crew preps for spacewalk

Date:
April 15, 2014
Source:
NASA
Summary:
Monday's launch attempt of the SpaceX Dragon cargo craft, loaded with nearly 5,000 pounds of supplies for the International Space Station's Expedition 39 crew, was scrubbed due to a helium leak on the Falcon 9 first stage. The next launch opportunity would be Friday, April 18 at 3:25 p.m. EDT if the issue can be resolved.

The SpaceX Falcon 9 that will carry the Dragon cargo craft into orbit awaits its launch at Launch Complex 40 at the Cape Canaveral Air Force Station, Fla.
Credit: NASA TV

Monday's launch attempt of the SpaceX Dragon cargo craft, loaded with nearly 5,000 pounds of supplies for the International Space Station's Expedition 39 crew, was scrubbed due to a helium leak on the Falcon 9 first stage. The next launch opportunity would be Friday, April 18 at 3:25 p.m. EDT if the issue can be resolved.

The launch of the third SpaceX Dragon commercial resupply services mission from Cape Canaveral Air Force Station in Florida will send the vehicle on course to rendezvous with the station several days later. Commander Koichi Wakata and Flight Engineer Rick Mastracchio will capture the space freighter using the Canadarm2 robotic arm to set it up for its berthing to the Earth-facing port of the Harmony module.

Mission managers and SpaceX had agreed Sunday to proceed with Monday's launch attempt despite the loss Friday of a multiplexer demultiplexer (MDM) backup computer relay system in the S0 truss that assists in providing insight into truss systems, the operation of the external cooling loops, the operations of the Solar Alpha Rotary joints and the Mobile Transporter rail car.

The International Space Station Mission Management Team met throughout the weekend to assess the work of the teams of engineers analyzing the problem and determined that the station has enough redundancy to permit the SpaceX Dragon launch to proceed. A contingency spacewalk is now scheduled for no earlier than April 22 to replace the failed backup computer relay unit in the S0 truss.

On Sunday, the Mobile Transporter was moved to a worksite to provide spacewalking astronauts the access they will need to replace the MDM during the contingency spacewalk. The Solar Alpha Rotary joints will be placed at the correct angle following the launch of the Dragon cargo vehicle in advance of its arrival.

Aboard the station Monday, Mastracchio and Flight Engineer Steve Swanson spent most of the day inside the Quest airlock working on the replacement of a fan pump separator in one of the two spacesuits they will wear during the planned 2 hour contingency spacewalk. This will be the 179th spacewalk in support of station assembly and maintenance.

Mastracchio and Swanson also reviewed training materials for the Dragon spacecraft and studied the plan for unloading the cargo.

Wakata conducted another session of the Hybrid Training experiment. This Japan Aerospace Exploration Agency study takes a look the health benefits of applying electric stimulation to a muscle opposing the voluntary contraction of an active muscle. In addition to providing a backup to the traditional exercise devices aboard the station, Hybrid Training may be useful in keeping astronauts fit as they travel beyond low Earth orbit aboard smaller spacecraft.

The Japanese commander also began the first RaDI-N radiation detection session for Expedition 39. After Flight Engineer Mikhail Tyurin initialized the detectors, Wakata deployed the neutron monitors in the Columbus module. Results from RaDI-N will help researchers accurately measure the risk assessment of neutron radiation in space and reduce the astronauts' exposure to radiation on future missions.

Wakata rounded out his day flushing the cooling loops of the U.S. spacesuits.

On the Russian side of the complex, Flight Engineer Oleg Artemyev conducted the Relaxation experiment, which studies chemical luminescent reactions in the Earth's atmosphere.

Flight Engineer Alexander Skvortsov continued unloading cargo from the ISS Progress 55 cargo ship, which delivered nearly three tons of cargo to the orbital laboratory when it launched and docked with the station on April 9.

Tyurin participated in a routine hearing assessment and performed routine maintenance on the life-support system in the Zvezda service module.


Story Source:

The above story is based on materials provided by NASA. Note: Materials may be edited for content and length.


Cite This Page:

NASA. "Dragon cargo craft launch scrubbed; Station crew preps for spacewalk." ScienceDaily. ScienceDaily, 15 April 2014. <www.sciencedaily.com/releases/2014/04/140415083053.htm>.
NASA. (2014, April 15). Dragon cargo craft launch scrubbed; Station crew preps for spacewalk. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2014/04/140415083053.htm
NASA. "Dragon cargo craft launch scrubbed; Station crew preps for spacewalk." ScienceDaily. www.sciencedaily.com/releases/2014/04/140415083053.htm (accessed October 20, 2014).

Share This



More Space & Time News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Comet Siding Spring Grazes Mars' Atmosphere

Comet Siding Spring Grazes Mars' Atmosphere

Newsy (Oct. 19, 2014) A comet from the farthest reaches of the solar system passed extremely close to Mars this weekend, giving astronomers a rare opportunity to study it. Video provided by Newsy
Powered by NewsLook.com
Latin America Launches Communications Satellite

Latin America Launches Communications Satellite

AFP (Oct. 17, 2014) Argentina launches a home-built satellite, a first for Latin America. It will ride a French-made Ariane 5 rocket into orbit, and will provide cell phone, digital TV, Internet and data services to the lower half of South America. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
This Week @ NASA, October 17, 2014

This Week @ NASA, October 17, 2014

NASA (Oct. 17, 2014) Power spacewalk, MAVEN’s “First Light”, Hubble finds extremely distant galaxy and more... Video provided by NASA
Powered by NewsLook.com
Saturn's 'Death Star' Moon Might Have A Hidden Ocean

Saturn's 'Death Star' Moon Might Have A Hidden Ocean

Newsy (Oct. 17, 2014) The smallest of Saturn's main moons, Mimas, wobbles as it orbits. Research reveals it might be due to a global ocean underneath its icy surface. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins