Author Topic: ISS U.S. EVA-48 - February 16, 2018  (Read 9174 times)

Offline Targeteer

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ISS U.S. EVA-48 - February 16, 2018
« on: 01/27/2018 01:10 PM »
I don't see a thread yet for Monday's EVA so here it is.  With word in other threads that this EVA will return the degraded LEE to the arm because the replacement has only one functional command string, I'm wondering if there will be enough time to bring in the LEE planned for return on Dragon or will another EVA be required? ???
« Last Edit: 02/13/2018 08:14 PM by Targeteer »
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Online Olaf

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Re: ISS U.S. EVA-48 - January 29, 2018
« Reply #1 on: 01/27/2018 01:35 PM »
https://twitter.com/cbs_spacenews/status/956966161681403904
Quote
ISS EVA47/48: Assuming no surprises over the weekend -- the new LEE-B will be detached and mounted on a stowage deck; its camera will be removed and attached to the original LEE mechanism; the old unit then will be re-attached to the robot arm; no other LEE work is planned

Offline centaurinasa

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Re: ISS U.S. EVA-48 - January 29, 2018
« Reply #2 on: 01/27/2018 10:25 PM »
Quote
After extensive troubleshooting by teams from NASA and the Canadian Space Agency (CSA), the decision was made by space station managers to use the scheduled Jan. 29 spacewalk to reinstall the LEE removed on the Jan. 23 spacewalk to restore fully redundant capability to the robotic arm

But...

Quote
CSA and its robotics specialists are continuing diagnostics over the weekend to gain additional insight. If data is obtained that could be used to solve the issue, Mondayís spacewalk could be postponed

https://blogs.nasa.gov/spacestation/2018/01/26/spacewalkers-preparing-for-mondays-spacewalk-with-updated-plan/
« Last Edit: 01/27/2018 10:27 PM by centaurinasa »

Offline centaurinasa

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Online Olaf

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Re: ISS U.S. EVA-48 - January 29, 2018
« Reply #4 on: 01/28/2018 01:17 PM »
https://twitter.com/cbs_spacenews/status/957613464322760704
Quote
EVA47/48: A test Saturday night confirmed the patch worked and the arm is now deemed fully operational; a second spacewalk to move a faulty grapple fixture inside for return to Earth, and to relocate another outside the station, has been deferred to mid February

Offline centaurinasa

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Offline Rocket Science

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Re: ISS U.S. EVA-48 - February, 2018
« Reply #6 on: 01/29/2018 02:41 PM »
Great article on the LEE gentlemen and the opportunity to learn more on aging hardware on ISS...
« Last Edit: 01/29/2018 08:07 PM by Rocket Science »
"The laws of physics are unforgiving"
~Rob, Physics instructor, aviator, vintage auto racer

Offline centaurinasa

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Re: ISS U.S. EVA-48 - February, 2018
« Reply #7 on: 01/30/2018 06:06 PM »
Quote
Astronauts Mark Vande Hei and Norishige Kanai are planning to begin their spacewalk Feb. 15 at 7:10 a.m. EST...
Quote
NASA TV will begin its live broadcast of the spacewalk at 5:30 a.m.

https://blogs.nasa.gov/spacestation/2018/01/30/rescheduled-robotics-work-makes-two-spacewalks-in-february/

Offline deruch

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Re: ISS U.S. EVA-48 - February 15, 2018
« Reply #8 on: 01/30/2018 10:21 PM »
Quote
ISS Daily Summary Report Ė 1/29/2018

SSRMS LEE status:  During USOS EVA 47, LEE serial number 201 was removed from the SSRMS and replaced with the spare LEE, serial number 204.  After the installation, ground teams were unable to bring LEE 204 to an operational state on primary power.  Redundant power operated as expected.  Due to this anomaly, plans were put in place to swap the LEEs back and place LEE 201 on the SSRMS as it was before.  Over the weekend, ground teams were able to install diagnostic software that identified the root cause as a faulty initial force reading.  Ground and on orbit testing confirmed the root cause, and also confirmed the ability to operate the LEE on the prime power string if the LEE was already grappled to a fixture.  A software update is being developed to resolve the issue, and is targeted for uplink in two weeks, at which point it is expected that the LEE currently installed on the SSRMS (LEE 204) will be fully operational.

That explains the 2 week delay to EVA-48.  It lets MDA/CSA finish the fix and upload it.  If the fix doesn't end up working, they'll still be able to revert the LEEs to the preEVA-47 situation in a single spacewalk.  So, the delay is just however long it will take the software teams to get the fix worked out and through testing, plus maybe a few days for on-orbit testing of the patched LEE.  That's more fast work by all the ROBO teams after they already were able to hack together the diagnostic to find the fault in the first place.  They may not often get the spotlight like the astronauts do, but engineering support is awesome.  Keep up the great work guys/gals!
Shouldn't reality posts be in "Advanced concepts"?  --Nomadd

Offline Targeteer

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Re: ISS U.S. EVA-48 - February 15, 2018
« Reply #9 on: 02/08/2018 10:16 PM »
February 08, 2018
MEDIA ADVISORY M18-025
NASA TV to Air US Spacewalk at the International Space Station
 

Two astronauts will venture outside the International Space Station Thursday, Feb. 15, to move components for the stationís robotic system into long-term storage. Live coverage of the spacewalk will begin at 5:30 a.m. EST on NASA Television and the agencyís website.

Expedition 54 Flight Engineers Mark Vande Hei of NASA and Norishige Kanai of the Japan Aerospace Exploration Agency are scheduled to begin the spacewalk at 7:10 a.m. and finish about 1:40 p.m.

The two spacewalkers will move a Latching End Effector (LEE), or hand, for the Canadian-built robotic arm, Canadarm2, from a payload attachment on the stationís Mobile Base System rail car to the Quest airlock. This LEE was replaced during an Expedition 53 spacewalk in October 2017, and will be returned to Earth to be refurbished and returned to the orbiting laboratory as a spare.

They also will move an aging, but functional, LEE that was removed during a Jan. 23 spacewalk from its temporary storage outside the airlock to a long-term storage location where it will be available as a spare part for the Mobile Base System, which is used to move the arm and astronauts along the stationís truss structure.

The spacewalk originally was scheduled Jan. 29 but was postponed when a new LEE installed during the Jan. 23 spacewalk encountered startup issues. Those issues were resolved Jan. 27 through software updates written by Canadian Space Agency robotics specialists.

The spacewalk will be the 208th in support of space station assembly and maintenance and the third station spacewalk this year. The spacewalk will be the fourth spacewalk in Vande Heiís career and the first for Kanai, who will become the fourth Japanese astronaut to walk in space. Vande Hei will wear the suit bearing the red stripes and Kanaiís suit will have no stripes.

For more information about the International Space Station, its research and crews, visit:

https://www.nasa.gov/station
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Online Olaf

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Re: ISS U.S. EVA-48 - February 15, 2018
« Reply #10 on: 02/13/2018 07:31 AM »
Delayed to February, 16 due to Progress docking on February, 15.
https://www.nasa.gov/multimedia/nasatv/schedule.html
Quote
5:30 a.m., Friday, February 16 - ISS Expedition 54 U.S. Spacewalk # 48 Coverage (Vande Hei and Kanai; spacewalk expected to begin appx. 7:10 a.m. EST)

Offline Targeteer

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Re: ISS U.S. EVA-48 - February 16, 2018
« Reply #11 on: 02/13/2018 08:16 PM »
CAPCOM stated during the evening DPC that EVA prep was delayed from Wednesday to Thursday (to support the delayed EVA)
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline yoichi

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Re: ISS U.S. EVA-48 - February 16, 2018
« Reply #12 on: 02/14/2018 02:32 AM »
EVA 47/48 summary(Japanese)

Offline AnalogMan

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Re: ISS U.S. EVA-48 - February 16, 2018
« Reply #13 on: 02/14/2018 10:36 AM »
EVA 47/48 summary(Japanese)


Machine translation to English attached (more or less understandable!).
« Last Edit: 02/14/2018 10:37 AM by AnalogMan »

Online jacqmans

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Re: ISS U.S. EVA-48 - February 16, 2018
« Reply #14 on: 02/14/2018 04:01 PM »
February 14, 2018
MEDIA ADVISORY M18-030

NASA TV to Air US Spacewalk at the International Space Station
 
Two astronauts will venture outside the International Space Station on Friday, Feb. 16, to move components for the stationís robotic system into long-term storage. Live coverage of the spacewalk will begin at 5:30 a.m. EST on NASA Television and the agencyís website.

Expedition 54 Flight Engineers Mark Vande Hei of NASA and Norishige Kanai of the Japan Aerospace Exploration Agency are scheduled to begin the planned six-and-a-half-hour spacewalk at 7:10 a.m.

The two spacewalkers will move a Latching End Effector (LEE), or hand, for the Canadian-built robotic arm, Canadarm2, from a payload attachment on the stationís Mobile Base System rail car to the Quest airlock. This LEE was replaced during an Expedition 53 spacewalk in October 2017, and will be returned to Earth to be refurbished and relaunched to the orbiting laboratory as a spare.

They also will move an aging, but functional, LEE that was detached from the arm during a Jan. 23 spacewalk and move it from its temporary storage outside the airlock to a long-term storage location. That LEE will be available as a spare part on the Mobile Base System, which is used to move the arm and astronauts along the stationís truss structure.

The spacewalk originally was scheduled for Jan. 29, but was postponed when a new LEE, installed during the Jan. 23 spacewalk, encountered startup issues. Those issues were resolved Jan. 27 through software updates written by Canadian Space Agency  robotics specialists. The spacewalk was rescheduled again to accommodate the Feb. 15 docking of the Russian Progress 69 cargo spacecraft that launched Feb. 13.

The spacewalk will be the 208th in support of space station assembly and maintenance and the third this year. The spacewalk will be the fourth in Vande Heiís career and the first for Kanai, who will become the fourth Japanese astronaut to walk in space. Vande Hei will wear the suit bearing the red stripes and Kanaiís suit will have no stripes.

For more information about the International Space Station, its research and crews, visit:

https://www.nasa.gov/station

Online Chris Bergin

Re: ISS U.S. EVA-48 - February 16, 2018
« Reply #15 on: 02/15/2018 09:12 AM »
Live view of Mark at work.


Offline SMS

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Re: ISS U.S. EVA-48 - February 16, 2018
« Reply #17 on: 02/15/2018 08:09 PM »
Astronaut Norishige Kanai and astronaut Mark Vande Hei, astronaut Joseph Acaba / in Quest  / shooting date: which perform fit check of Extravehicular Mobility Unit (EMU) January 18, 2018  (iss 054e022288)
credit: JAXA / NASA
« Last Edit: 02/15/2018 08:23 PM by SMS »
---
SMS ;-).

Offline Targeteer

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Re: ISS U.S. EVA-48 - February 16, 2018
« Reply #18 on: 02/16/2018 06:41 AM »
EVA prep is underway.  Morning DPC was Russian only.
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline Targeteer

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Re: ISS U.S. EVA-48 - February 16, 2018
« Reply #19 on: 02/16/2018 06:59 AM »
60 minute pre-breathe complete
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

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