ISS Daily Summary Report – 3/16/2021


Combustion Integrated Rack (CIR) / Advanced Combustion via Microgravity Experiments (ACME): The crew performed the steps necessary to lubricate the quick disconnect (QD) for the gas chromatograph argon gas bottle. They also replaced the N2/O2 gas bottle at manifold 2 and installed an ethane fuel bottle at the manifold 4 location. This was performed in support of the Cool Flames Investigation with Gases (CFI-G) experiment. Cool diffusion flames were discovered during droplet combustion experiments aboard the ISS in 2012, and this initiated a rapidly growing field of combustion research. A cool flame is one that burns at about 600 degrees Celsius. A typical candle is about three-and-a-half times hotter, burning at around 1,400 degrees Celsius. Most internal combustion engines are designed using computer models that neglect cool flame chemistry, but ignition and flame propagation in engines depend on cool flame chemistry. Cool flame chemistry also has a significant impact on fuel octane and cetane numbers, whose understanding has large economic consequences.

Human Research Facility (HRF)-1 improved Payload Ethernet Hub Gateway (iPEHG) Install: Following the resolution of the coolant line interference with the iPEHG power cable last week, the crew continued the activities to replace the Payload Ethernet Hub Bridge (PEHB) with an iPEHG. HRF-1 provides an on-orbit laboratory that enables scientists conducting human life science research to evaluate the physiological, behavioral, and chemical changes induced by space flight. Research performed using HRF-1 provides data to help scientists understand how the human body adapts to long-duration spaceflight.

Myotones: The crew marked the location of the seven muscles, two tendons and one area of fascia studied in the investigation and took measurements with the Myotones device. The Myotones investigation observes the biochemical properties of muscles during long-term exposure to the spaceflight environment. Results from this investigation are expected to provide insight into principles of human resting muscle tone, which could lead to the development of new strategies for alternative treatments for rehabilitation both on Earth and for future space missions.

Ribosome Profiling: Tuesday was planned to be day-1 of the experiment, but issues were encountered with a cable connection. This was resolved, but the experiment will need to be replanned to a later date. Since life on Earth emerged about 4 billion years ago, living species have evolutionally adjusted to Earth’s gravity. However, how cells utilize gravity for their gene expression has remained largely unknown. The Genome-wide Survey of Translational Control in Microgravity (Ribosome Profiling) investigation aims to provide insight into how gravity impacts gene expression, with a special focus on translation regulation utilizing a state-of-art technique called “ribosome profiling”.


Soyuz Relocation Preparations: The 63S crew completed an On-board Training (OBT) in preparation for the upcoming 63S Soyuz port relocation. The training session covered undocking and docking procedures as well as a walkthrough of associated relocation milestones. Additionally, the 63S Soyuz performed a thruster test to verify flight readiness. The 63S crew will board their Soyuz and relocate the vehicle from the MRM1 port to the MRM2 port on Friday March 19th in order to allow for 64S Soyuz docking at the MRM1 port planned on April 9th.

Catalytic Reactor Remove & Replace (R&R) Preparations: In preparation for the Catalytic Reactor R&R planned for tomorrow, the crew removed portions of Treadmill 2 (T2) in Node 3 and installed Active Rack Isolation System (ARIS) pivot fittings to the Water Recovery System (WRS) Rack. This activity allows access to rotate WRS-1 Rack. T2 will not be available for exercise until after the Catalytic Reactor R&R is completed.

Ultrasound Eye Exam: Today the crew used an ultrasound device to perform an eye scan, one of several routine ultrasound eye exams during their stay on ISS. Eye exams are performed regularly onboard in order to monitor crewmember’s eye health. Eyesight is one of many aspects of the human body affected by long-duration stays in a microgravity environment.

Completed Task List Activities:

  • HRF Veg Taste Test and Survey
  • PL Cntl Box SD Card Unit Removal and Stow
  • WHC Solid Waste Container [КТО] Replace
  • JEM Stowage Consolidation for SpX-22 Part 1 and Part 2

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

  • Thermal Amine Scrubber Activation for 2-bed Operations
  • Weekly Lab MCA Zero Calibration
  • UTS Offload EDV Swap
  • T2 Deactivation
  • Thruster and LS Inh/Ena for 63S Thruster Test
  • Salsa SSC Service Pack Deploy (IN WORK)

Look Ahead Plan

Wednesday, March 17 (GMT 076)

  • AC Touch
  • Astrobatics
  • AWP
  • CGBA4 Label
  • Micro-16, Repository
  • Ribosome Profiling
  • Standard Measures
  • Catalytic Reactor R&R


  • Dragon Tablet Sync
  • EVA Tool Stow
  • EMU Loop Scrub & Iodinate
  • LIDAL Uninstall

Thursday, March 18 (GMT 077)

  • Asian Herb
  • AWP
  • DOSIS LED Check
  • Food Acceptability
  • Hunch Tape Dispenser
  • ICF
  • J-SSOD-16 Removal
  • LSR Maintenance
  • Ribosome Profiling
  • Standard Measures


  • Cygnus Cargo Operations
  • EMU Loop Scrub & Iodinate
  • EVA Tool Stow
  • THC IMV Flow Measure
  • LIDAL Relocate

Friday, March 19 (GMT 078)

  • AC Touch
  • FIR Troubleshooting
  • Food Acceptability
  • Grape Microbiota
  • ISS HAM Pass
  • J-SSOD-M2 Install
  • Kermit
  • Repository
  • Ribosome Profiling
  • RTPCG-2


  • 63S Port Relocation
  • EVA Tool Stow
  • EVA HECA Install

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

  • Regenerative Environmental Control and Life Support System (ECLSS) Recycle Tank Drain
  • Micropurification Unit (БМП) Absorption Cartridge Ф1 Regeneration (Termination)
  • Micropurification Unit (БМП) Absorption Cartridge Ф2 Regeneration (Initiation)
  • WOOV8 R&R Big Picture Words reading
  • Station Support Computer (SSC) 6 Shell Swap
  • КСПЭ (COSS) Camcorder Preparation and Setup in the SM for the OBT Video Downlink in MPEG2. Note 10
  • Myotones Measurements
  • Soyuz 747 (63S) Relocation OBT
  • Environmental Health System (EHS) Total Organic Carbon Analyzer (TOCA) Water Recovery System (WRS) Sample Analysis
  • Ribosome Profiling Medium Exchange Part1 and Part 2 (DEFERRED)
  • Combustion Integrated Rack GC Argon Bottle Replace
  • Power Off Camcorder and [TBC] Television Subsystem. Close Applications
  • T2 System Shutdown
  • T2 SSC Relocate
  • USB Flash Drive to be removed from ICF
  • Public Affairs Office (PAO) Event in High Definition (HD) – JEM
  • Human Research Facility (HRF) Rack 1 PEHG Install 2
  • URISYS Hardware Setup
  • [АСУ] Activation in Soyuz 747 (63S) Prior to Relocation
  • Soyuz 747 (63S) СУДН Test Prior to Relocation
  • In-flight Maintenance (IFM) Pivot Fitting Scavenge
  • In-flight Maintenance (IFM) Treadmill 2 and Water Recovery System 1 Rack Prep
  • Micro-16 SABL USB Drive Install
  • Hardware Setup for БПИ НЧ Ops
  • In Flight Maintenance (IFM) Urine Transfer System (UTS) Removal and Install
  • VZAIMODEYSTVIYE-2. Experiment Ops
  • Health Maintenance System (HMS) – OCT2 Exam
  • Waste & Hygeine Compartment (WHC) Water Container (ЕДВ) Remove and Replace
  • Urine Transfer System Offload EDV Swap