space station astronauts cleared for third spacewalk - water absorption

by:Demi     2019-08-24
space station astronauts cleared for third spacewalk  -  water absorption
The international space station manager on Friday approved astronauts Barry Bouch Wilmore and Terry Willis for their third spacewalk on Sunday as planned, after ending Wednesday's EVA, having a small amount of water in virts's space helmet is an understandable condition that poses no threat to the safety of the crew.
The six-and-a-half-
The space walk starts around 7: 10. m.
On Sunday, US eastern time, when astronauts switched their space suits to battery power and pulled out of the gas gate of the space station.
Space walkers plan to install four antennas, laser reflector and cables in order to communicate with the approaching and departing commercial carrier cabins that Boeing and SpaceX are building.
"We will be laying cables over 400 feet kilometers," Virts told reporters on Thursday . ".
"These cables will be connected to some antennas that will be used for American vehicles that will be docked in the future, bringing the crew to the space station starting in a few years.
Trump awarded D-
"So we need to put these antennas and cables there for them and there are also some reflector so they can-
Vehicle navigation system using laser (to)
Know where the station is, what direction it is in, and be able to dock properly.
There is a lot of movement from one end to the other on the station, where we will bring a lot of equipment and hardware.
"During the spacewalk last Saturday and Wednesday, wilmore and Virts listed about 340 feet of the power and data lines needed for the two new docking mechanisms that will be installed later this year, and prepare for repositioning the storage module and docking port expansion.
Virts also lubricated the fighting mechanism at the end of the robot arm of the space station.
During Wednesday's airlock suppression, Virts noticed a small piece of water floating on the helmet and reported that the suction pad behind the helmet was damp, indicating that there was water seepage in the air pipe of the helmet.
During a space walk in July 2013, Italian astronaut Luca Parmitano experienced a potentially catastrophic leak that forced him to quickly retreat to the safety of the gas gate
This leak is caused by the blockage of the filter inside the suit water cooling system.
But in the case of the virus, the water intrusion occurs after the space suit is reconnected to the umbilical cord of the space station, and after the start of the airlock suppression.
It turns out that after seven spacewalks, the same spacesuit went through a similar event as a result of condensation of the spacesuit cooling system after the airlock suppression.
Alex Kanelakos said: "When you connect to the umbilical cord, you will have a lot of cold air going through the cooling system of the suit, which will often condense," NASA spacewalk officials said on Friday.
"When we are depressed, we have a lot
Density gas flows through this condensed water that can normally move water on the crew helmet.
A maximum of 57 ml, or about 4 tablespoons, of "sublimation water carry-over" is considered acceptable, well below Parmitano's experience.
In the case of a virus, only about 15 ml-
Three teaspoons-
There was water in the helmet.
"As we all know, this space suit has what we call carrying water," Kanelakos said . ".
"We had seven more similar incidents on the space suit. . . .
This is not expected every time, but it is a known feature.
That's why we monitor a lot of parameters on the ground.
We keep getting the data and we are looking at it to see if we have encountered this or what happened to Luca.
And they are very different.
"Unless we're sure it's a good suit, I'm completely confident I won't go out," Virts told reporters on Thursday . ".
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