NASA astronauts Kayla Barron and Raja Chari concluded their spacewalk at 3:06 p.m. EDT after 6 hours and 54 minutes in preparation for upcoming solar array installation.
Barron and Chari completed their major objectives for today to prepare the space station for upcoming solar array upgrades by assembling and installing modification kits. The duo built a support bracket onto which a future ISS roll out solar array (iROSA) will be mounted. So far, two of six iROSAs have been deployed on station with four additional arrays to be delivered. The arrays will ultimately augment six of the station's eight power channels, increasing the station's total available power from 160 kilowatts to up to 215 kilowatts.
It was the 247th spacewalk in support of space station assembly, upgrades and maintenance, and was the first in Chari's career and the second for Barron. Chari and Barron are in the midst of a planned six-month science mission living and working aboard the microgravity laboratory to advance scientific knowledge and demonstrate new technologies for future human and robotic exploration missions as part of NASA's Moon and Mars exploration approach, including lunar missions through NASA's Artemis program.
Astronaut roles for the next spacewalk on March 23 will be confirmed soon. NASA TV coverage for the March 23 spacewalk will begin at 7:30 a.m. for a spacewalk expected to begin around 8:50am.
For the Wednesday, March 23, spacewalk, designated U.S. EVA 80, two astronauts will install hoses on a Radiator Beam Valve Module that routes ammonia through the station's heat-rejecting radiators to keep systems at the proper temperature. The crew members also will install a power and data cable on the Columbus module's Bartolomeo science platform, replace an external camera on the station's truss, and conduct other upgrades to station hardware.
On-Orbit Status Report
Nutrition Monitoring for the International Space Station (NutrISS): In support of the NutrISS investigation, an ESA Nutritional Assessment (ENA) was performed.In the NutrISS investigation, a periodic assessment of body composition (body weight, fat mass, and fat-free mass) during spaceflight aboard the ISS is carried out using a dedicated bio-impedance analysis device to allow for the measurement of long-term energy balance modification over time. It is hypothesized that an adjusted diet maintaining a near-neutral energy balance, and/or increasing protein, intake can limit microgravity-induced bone and muscle loss.
Standard Measures (SM):In support of the SM investigation, an Actiwatch Plus (AWP) was retrieved and donned, and a pre-sleep questionnaire was filled out.The aim of the investigation is to ensure consistent capture of an optimized, minimal set of measures from crewmembers until the end of the ISS Program in order to characterize the adaptive responses to and risks of living in space.Among other things, the ground teams perform analyses for metabolic and chemistry panels, immune function, microbiome, etc.These measures populate a data repository to enable high-level monitoring of countermeasure effectiveness and meaningful interpretation of health and performance outcomes and support future research on planetary missions.
Space Tango - CubeLab:The crew removed the two CubeLab satellites from their TangoLab facility location, activated them, and photo-documented the resulting operations.Following this they were re-installed in their TangoLab location to recharge and transfer data.Space Tango - CubeLab Satellite Demonstrator tests a new attitude-control technology for small satellites, which is an integral part of future space missions. Conventional attitude control systems for large satellites are not suited for small satellites. The new technology is energy efficient, lightweight, and not subject to friction wear and could enhance the attitude maneuvering capabilities of small satellites.
USOS EVA 79: 3A IROSA Prep EVA: Today, ISS crewmembers Kayla Barron and Raja Chari completed the 79th USOS Extravehicular Activity (EVA). The main goal of this EVA was to continue with the assembling and installation of modification kits required for the future solar array upgrades, called the ISS Roll-Out Solar Arrays (IROSA). The IROSA is a modification to the existing Solar Array Wings (SAWs). It provides additional power for the proposed commercial modules to be launched to station as well as MLM. During the 6-hour and 54-minute EVA, the EV crew completed the following objectives:
Install IPA Mod Kit on S4 3A Mast CanisterFold back S6 BCDU MLIS6 BCDU 1 H1 & H2 Break Torque & ResetS6 BCDU 2 H1 & H2 Break Torque & ResetAdditionally, the crew completed the following get-ahead procedures including robotic enhancements which reduce future EVA time by enabling robotic R&R capabilities:
BCDU 3A1 H1 and H2 break torque and resetBCDU 3A2 H1 release and H2 break torque and resetBCDU 3A3 H1 release and H2 break torque and resetDDCU 3A H1 and H2 break torque and resetDCSU 3A H1 and H2 break torque and resetPFCS 3A H3 and H4 break torque and resetAMS Patch Panel AccessTUS InspectionNetwork Monitoring Laptop Replace & Setup: The crew replaced an existing failed/degraded Network Monitoring System (NMS) Zbook Laptop with a stowed spare and connected the new laptop to the network and prepped for ground loading. The GigE to USB adapters were connected to the NMS and the failed laptop was stowed.
In-Flight Maintenance (IFM) Waste and Hygiene Compartment (WHC) Pre-Treat Tank Remove & Replace (R&R): The crew R&Red the Pre-Treat Tank as part of nominal WHC preventive maintenance. Each tank contains five liters of pre-treat solution, a mixture of acid, chromium oxide, and water, used for toiled flushing and required for nominal WHC operation. The installed WHC Dose Pump connectors and pump head were inspected for pre-treat leaks. The spare WHC Urine Filter Hose was also inspected and configured for stowage to minimize risk for hose kinking or damage.
Completed Task List Activities:
NoneToday's Ground Activities:All activities are complete unless otherwise noted.
3A IROSA Prep EVALook Ahead Plan
Wednesday, March 16 (GMT 75)Payloads:
Confocal Space MicroscopyEasyMotion/CEVISELT2 SetupFood AcceptabilityLSG OpsMyotonesNutrISSSpace Biofilms-2Standard MeasuresSQuAREUNIGLOVascular AgingSystems:
Columbus Bay Clean-up/RestowEMU Water RechargeReturn SSC 12WHC ЕДВ R&RPOC DOUG Software ReviewEVA QD Training ReviewHD EMU Camera Assembly TerminateEMU LLB/REBA RemovalEVA Battery OpsEVA DebriefThursday, March 17 (GMT 76)Payloads:
HRF PC Software UpdateISS HAM PassJ-SSOD-21 InstallLuminaNutrISSPG TideSQuAREStandard MeasuresSQuARETouching SurfacesUNIGLOVascular AgingWireless Compose-2Systems:
OGA Pump ORU FlushEVA Tool ConfigEMU ECWS OBTRobotics Procedure PrintEVA Procedure ReviewOBT ROBoT SetupIMS ConferenceWHC Manual FillOBT ROBoT SessionOGA Post Maintenance Flush/StowSSC 10 and 20 SwapEMU SwapEMU ResizeMETOX Regeneration TerminationFriday, March 18 (GMT 77)Payloads:
CAL MTL Leak CheckEasyMotion/T2FROST2 CheckoutJEM MicrobeLSG Hardware AuditRepositorySQuAREVascular AgingSystems:
PAM iPad DeployEVA Battery Operations Terminal TerminateUS EVA Ammonia OBTBrine Processor Bladder ChangeoutEVA Procedure ReviewEVA Procedure ConferenceREBA Powered Hardware CheckoutEMU LLB METOX InstallationISS Safety BriefingToday's Planned Activities:All activities are complete unless otherwise noted.
Assist with ISLE EVA PREP activitiesExtravehicular Activity (EVA) In-Suit Light Exercise (ISLE) PreparationComm configuration for USOS EVAExtravehicular Mobility Unit (EMU) PurgeActiwatch Plus Watch DonExtravehicular Mobility Unit (EMU) In-Suit Light Exercise (ISLE) PrebreatheTangoLab CubeLab Satellite Activation and CheckoutAirborne Particulate Monitor Status CheckCrewlock DepressNetwork Monitoring Laptop Replace & SetupCrewlock Post DepressCrewlock EgressWorksite Prep3A Center Pad To Mast CanisterInstall 3A Left StrutsIn Flight Maintenance (IFM) Waste and Hygiene Compartment (WHC) Pre-Treat Tank Remove & ReplaceInstall 3A Right Struts, MLI, and ClampsNutrISS - ESA Nutritional AssessmentMicrogravity Science Glovebox MSG Laptop ActivationSQuARE Flexible Daily ImageryWorksite CleanupWaste Hygiene Compartment Urine Filter Hose ConfigureS6 Battery Charge Discharge Unit Multi-Layer Insulation TiebackStowage Photo SurveyUS EVA 79 Get Ahead TasksLSG Work Volume DeployNetworK Monitoring Closeout and CleanupEVA Crew Lock IngressCrewlock Pre RepressCrewlock RepressReturn to nominal comm configuration after USOS EVAStandard Measures Pre-sleep QuestionnaireExtra Vehicular Activity (EVA) Post-EVA ActivitiesPhoto/TV Extravehicular Activity (EVA) Camera DisassemblyEVA Glove Photo Downlink
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