ISS Daily Summary Report – 2/28/2021

USOS Extravehicular Activity (EVA) #71 – ISS Roll Out Solar Array (IROSA) Prep: Today, EV1 Kate Rubins and EV2 Victor Glover performed a 7 hour 4 minute EVA and completed the following tasks in support of the IROSA Prep EVA:

  • Build the 2B Upper Bracket
  • Install the 2B Center Pad to Mast Canister
  • Install the 2B Left Struts
  • Install 2B Right Struts, MLIs, and Clamps
  • Build the 4B Upper Bracket

The EV Crew was unable to fully tighten the bolts on the 2B structure during the EVA. Ground teams determined that the 2B structure did not require a tie down, but the site will need to be revisited during a following EVA to complete the bolt tightening. Due to the overrun of the 2B installation operations, the installation of the 4B Center Pad to Mast Canister and the 4B Right Lower Strut were not completed and will need to be completed during a following EVA.


Combustion Integrated Rack (CIR) Fluids and Combustion Facility: The crew set the CIR Valve Timers on the front of the Optics Bench. The CIR includes an optics bench, combustion chamber, fuel and oxidizer control, and five different cameras for performing combustion investigations in microgravity.

Micro-16: The crew performed Micro-16 sample loading and video imaging using the BioServe Microscope. Loss of muscle mass and strength present a major challenge for astronauts on future long space voyages. Determining Muscle Strength in Space-flown Caenorhabditis elegans (Micro-16) uses this tiny worm to test whether decreased expression of muscle proteins is associated with decreased strength. The research team developed a new device to measure muscle strength in multiple generations of space-reared C. elegans worms and compare that strength to postflight muscle gene expression analyses.

Packed Bed Reactor Experiment (PBRE): The crew inspected the MSG Work Volume for any water release from the PBRE Vent Hose. The PBRE studies the behavior of gases and liquids when they flow simultaneously through a column filled with fixed porous media. The porous media or “packing” can be made of different shapes and materials and are used widely in chemical engineering as a means to enhance the contact between two immiscible fluid phases (e.g., liquid-gas, water-oil, etc.). Packed columns can serve as reactors, scrubbers, strippers, etc. in systems where efficient interphase contact is desired, both on Earth and in space.


Extravehicular Activity (EVA) Preparations: On Saturday, the crew performed several activities in preparation for the ISS Roll Out Solar Array (IROSA) EVA. The crew performed tool configurations, tool audits, and equipment lock preparations. The crew also reviewed the EVA procedures and participated in a conference with the ground.

Cygnus Cargo Operations: Both today and Saturday, the crew completed cargo transfer operations between the ISS and the Cygnus Northrup Grumman (NG)-15 vehicle.

Safety Video Survey: Today the crew completed a video of the ISS interior volume to allow ground teams to assess current vehicle configuration as well as identify any areas of concern related to ventilation blockage, flammability hazards, emergency egress paths, access to fire ports and safety equipment. This survey is performed approximately every six months.

Completed Task List Activities:

  • None

This Weekend’s Ground Activities:
All activities are complete unless otherwise noted.

  • IROSA Prep EVA Commanding and Support
  • Nominal Ground Commanding

Look Ahead Plan

Monday, March 1 (GMT 060)

  • ICF USB remove (NASA)
  • RTPCG2 card print (NASA)
  • SABL-3 tray insert (NASA)
  • AC Touch (NASA)
  • EKAM Node2 setup and act (Joint)
  • EPM ESEM4 switch on (ESA)


  • EVA Debrief Conference
  • EVA Procedure & DOUG Review
  • ROBO Procedure Conference
  • EVA QD Training Review
  • OGS H2 Sensor R&R

Tuesday, March 2 (GMT 061)

  • BioAnalyzer setup and stow (CSA)
  • Ribosome Proofing CBEF Humidifier Install (JAXA)
  • AWP HRF2 setup and data d/l (NASA)
  • RTPCG2 Plate loading (NASA)
  • PBRE Water Inspect (NASA)
  • AHOSS hardware setup (NASA)
  • BPA cable install (NASA)
  • SERFE sample process (NASA)
  • AC Photo (NASA)


  • Dragon Tablet Sync
  • Cygnus Cargo Ops
  • EVA Procedure Review & Conference
  • EVA Tool Configuration
  • EMU Resize
  • EMU H2O Recharge 

Wednesday, March 3 (GMT 062)

  • DOSIS DOSTEL-1 Install
  • Facet Cell installation into SCOF
  • BPA Install & Hose Route
  • Spaceborne Computer-2 Installation


  • EVA Ammonia OBT
  • EVA Procedure Conference
  • EVA Cuff Print
  • EVA Tool Configuration
  • WHC Piping R&R
  • IMV Flow Measure

This Weekend’s Planned Activities:
All activities are complete unless otherwise noted.

  • End of GoPro SM-AGAT-U55 charging and stowage
  • Relocate PBAs for upcoming EVA
  • Extravehicular Activity Pistol Grip Tool Battery Installation
  • Crew Dragon Hatch Seal Cleaning
  • PELLE. Download & placement before US EVA
  • Equipment Lock (E-LK) Preparation
  • Micro-16 MELFI Media Retrieve
  • Extravehicular Activity (EVA) Tool Configuring
  • Photo TV Extra Vehicular Activity (EVA) Camera Turnaround
  • Extravehicular Activity (EVA) Tool Audit
  • Microscope Reposition Preparation
  • Combustion Integrated Rack Valve Timer Set
  • PBRE/MSG Water Release Inspection/Cleanup
  • Extravehicular Activity (EVA) Procedure Review
  • Extravehicular Activity (EVA) Procedure Conference
  • Environmental Health System (EHS) Total Organic Carbon Analyzer (TOCA) Water Recovery System (WRS) Sample Analysis
  • Micro-16 Experiment Setup
  • Micro-16 Initiation and Loading Operations
  • Extravehicular Activity (EVA) iPad Preparation
  • Regenerative Environmental Control and Life Support System (ECLSS) Recycle Tank Drain
  • Regenerative Environmental Control and Life Support System (ECLSS) Recycle Tank Drain Part 2
  • Micro-16 Microscopy Operations
  • Transfer Cygnus Cargo Operations
  • Urine Transfer System Offload EDV Swap
  • Environmental Health System (EHS) Total Organic Carbon Analyzer (TOCA) Sample Data Record
  • ISS HAM Kenwood Radio Power Down in Columbus
  • ISS HAM Radio Power Down in Service Module
  • Micro-16 MELFI Culture Return Bag Insertion
  • Microscope Reposition Post Ops
  • Micro-16 SABL USB Drive Install
  • Regenerative Environmental Control and Life Support System (ECLSS) Recycle Tank Fill Part 3
  • USOS EVA Comm Config
  • Extravehicular Activity (EVA) In-Suit Light Exercise (ISLE) Preparation
  • Micro-16 SABL USB Drive Remove
  • Monitoring shutter closure on SM windows 6, 8, 9, 12, 13 and 14
  • Extravehicular Mobility Unit (EMU) Purge
  • Extravehicular Mobility Unit (EMU) In-Suit Light Exercise (ISLE) Prebreathe
  • Crewlock Depress
  • Crewlock Egress
  • IROSA Prep EVA Operations
  • Experiment Ops Video Recording
  • EVA Crew Lock Ingress
  • Crewlock Pre Repress
  • Crewlock Repress
  • Extra Vehicular Activity (EVA) Post-EVA Activities (IN WORK)
  • Comm reconfig for nominal ops after USOS EVA (IN WORK)