ISS Daily Summary Report – 5/11/2021


AC Touch: Per standard procedure, the crew touched both of the coated and uncoated coupons for this long-term investigation. Crew then took photos of the hardware.  Boeing Environment Responding Antimicrobial Coatings tests is an antimicrobial coating on several different materials that represent high-touch surfaces. Some microbes change characteristics in microgravity, which could create new risks to crew health and spacecraft systems as well as creating the possibility of contaminating other planetary bodies. The samples will remain in space for approximately six months then return to Earth for analysis.

Celestial Immunity: The crew set up the appropriate hardware, performed sample 3 operations for cell culture set beta, and initiated the cell culture experiment gamma ops.  With the exception of last week’s alpha set of operations, Celestial Immunity operations have been going well.  This project seeks to gain a broad understanding of how gravity affects overall human immune function and potentially uncover novel pathways of immune function that can be exploited to develop better vaccines and immunobiologics for human use. The project will build on earlier studies that evaluated lymphocyte (a type of white blood cell) function in microgravity. The project will also evaluate whether gravity-regulated immune pathways are affected by age by examining cells from both young adult and elderly donors in parallel.

ISS HAM pass: The crew participated in an ISS HAM pass with Collège Descartes, Antony, France.  The College Descartes is a public general school with 700 students aged from 10 to 15.  The ARISS (Amateur Radio on the International Space Station) project is supported by 30 students within the school, aged from 13 to 15.  ISS Ham Radio provides opportunities to engage and educate students, teachers, parents and other members of the community in science, technology, engineering and math by providing a means to communicate between astronauts and the ground HAM radio units.

Standard Measures:  The crew performed several sample collections and answered a questionnaire related to the Standard Measures experiment. 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.

EXPRESS Rack 1 AAA Fan Replacement and Repair: As a continuation of the AAA troubleshooting, the crew removed the back panel of the rack, and replaced the AAA (Avionics Air assembly) high-speed cooling fan with a spare unit. The AAA fan circulates cooled air in the internal rack volume which subrack payloads can use for cooling.  EXpedite the PRocessing of Experiments to Space Station (EXPRESS) Racks are multipurpose payload rack systems that store and support research aboard the ISS. The EXPRESS Racks support science experiments in any discipline by providing structural interfaces, power, data, cooling, water, and other items needed to operate science experiments in space.

Node 3 Endcone Stowage and NRAL Stowage Operations: Today crew returned hardware that was used in multiple systems and maintenance operations last week to the Node 3 Endcone. Crew also gathered hardware from the Nanorack Airlock in order to back fill long term spares of multiple pieces of hardware.

Node 3 Moderate Temperature Loop (MTL) Gas Trap Plug Replacement: Today, Crew performed a replacement of the Gas Trap Plug on the Node 3 Moderate Temperature Loop (MTL) Pump Package Assembly (PPA). The EMU Gas Trap removes particulate contamination from the water flow to the EMU Water Pump and concentrates and directs free gas in the coolant loop to the EMU Water Separator. The EMU Gas Trap is considered an ORU and can be changed out on-orbit. The EMU Gas Trap lifetime is limited by the number of hours it has run with the fan.

US Extravehicular Activity (EVA) Retractable Equipment Tether (RET) Inspection: Crew inspected for damaged cords on mounted and unmounted RETs. Each RET cord must be inspected prior to EVA use. Instructions are included to tape unmounted RETs if required. After inspection/taping of unmounted RETs, Crew places the RETs in protective Bag per Stowage Note to isolate RETs from potential damage until ready for EVA use.

Completed Task List Activities:

  • None

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

  • SSRMS Direct Drive Test
  • COL-CC Prime MPLS maintenance
  • PRO CHeCS Commanding

Look Ahead Plan:

Wednesday, May 12 (GMT 132)

  • AC Touch
  • AWP
  • Celestial Immunity
  • PCRF relocation
  • Repository
  • Standard Measures
  • STFS-8
  • T2AR


  • Extravehicular Activity (EVA) Extravehicular Mobility Unit (EMU) Gas Trap Remove and Replace (R&R)
  • JLP1A2 Audit
  • Dragon 22 Prepack
  • Treadmill 2 (T2) Augmented Reality Sidekick Charge

Thursday, May 13 (GMT 133)

  • Celestial Immunity
  • HRP blood setup
  • Ryutai IPU cable replacement


  • ISPR and IPU HRDL Adapter Cable Setting between Ryutai Rack and iAPS
  • Dragon 22 Prepack
  • Environmental Health System (EHS) Acoustic Monitor Setup

Friday, May 14 (GMT 134)

  • AC Touch
  • Astrobee/SoundSee
  • Celestial Immunity
  • Food Acceptability
  • Food Physiology
  • MISSE MSC pack
  • Repository
  • Standard Measures


  • In Flight Maintenance (IFM) Node 2 Smoke Detector Relocate
  • In-Flight Maintenance Node 2 Common Cabin Air Assembly (CCAA) Water Separator R&R
  • Treadmill 2 (T2) Yearly Maintenance

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

  • Antimicrobial Coatings Documentation Photos
  • Antimicrobial Coatings Touch
  • Cold Atom Lab Science Module Move
  • Cold Atom Lab Science Module Return
  • Celestial Immunity Thaw and Centrifuge
  • Celestial Immunity Crew Handover
  • Celestial Immunity LSG Staging
  • Celestial Immunity MELFI Sample Insertion
  • Celestial Immunity MELFI Sample Retrieve
  • Celestial Immunity Plate Third Sampling
  • Celestial Immunity Treatment and Sample
  • Acoustic Monitor Battery Swap
  • Acoustic Monitor Setup for Crew Worn Measurements
  • Emergency CTB Replacement
  • Discharge PBAs with low pressure
  • EXPRESS Rack AAA Fan Replacement
  • Express Rack 1 R&R Hardware Gather
  • US Extravehicular Activity (EVA) Retractable Equipment Tether (RET) Inspection
  • Health Maintenance System (HMS) Vision Questionnaire
  • Health Maintenance System (HMS) Vision Test
  • HRF Generic HRF Centrifuge Frozen Blood Collection Operator
  • HRF Generic HRF Centrifuge Setup and Frozen Blood Collection Subject
  • HRF Generic HRF Centrifuge Frozen Blood Collection Conclude and Stow
  • HRF Generic HRF Centrifuge Frozen Blood Collection Configuration
  • HRF Generic HRF Centrifuge Frozen Blood Collection Spin Conclude
  • HRF Generic Frozen Blood Collection Hardware Setup
  • HRF Generic MELFI Sample Insertion
  • HRF Generic MELFI Sample Insertion Operations
  • HRF Generic MELFI Sample Retrieval And Insertion Operations
  • HRF Generic Urine Collection Female
  • HRF Generic Urine Collection Male
  • ISS HAM Columbus Pass Kenwood
  • Lab ExPRESS-1 Rack Rotate Down
  • Lab ExPRESS-1 Rack Rotate Up
  • LSG Primary Crew Restraint Unfold
  • Node 3 Endcone Stowage Replace
  • Node 3 Low Temperature Loop (LTL) Gas Trap Plug Replacement
  • Node 3 Moderate Temperature Loop (MTL) Gas Trap Plug Replacement
  • Hatch Close
  • Hatch Open
  • Nanoracks Airlock Stowage Operations
  • CHeCS Emergency Health Maintenance System Contingency Drill Training
  • Photo T/V (P/TV) Advanced Resistive Exercise Device (ARED) Exercise Video Setup
  • Photo T/V (P/TV) Advanced Resistive Exercise Device (ARED) Exercise Video Stow
  • Public Affairs Office (PAO) Event in High Definition (HD) in Columbus
  • Public Affairs Office (PAO) High Definition (HD) Config Columbus Setup
  • Standard Measures Body Sampling Collection
  • Standard Measures Body Sampling Stow
  • Standard Measures Body Sampling Survey
  • Standard Measures Fecal Collection
  • Standard Measures Fecal Collection Stow
  • Standard Measures Pre-sleep Questionnaire
  • Transfer Cygnus Cargo Operations