ISS Daily Summary Report – 4/28/2021

Resilience Crew Undocking Delay: It has been decided, due to inclement weather at the landing zone, that the Resilience Crew Undocking that was scheduled today, Wednesday 4/28, will be postponed until no earlier than Friday 4/30.


ACME (Advanced Combustion via Microgravity Experiments):  Crew replaced an ACME controller. The crew opened the rack doors and the combustion chamber of the ACME and then replaced the Fuel Controller. The Advanced Combustion via Microgravity Experiments (ACME) project is a set of six independent studies of gaseous flames to be conducted in the Combustion Integrated Rack (CIR).  ACME’s primary and secondary goals are (1) improved fuel efficiency and reduced pollutant production in practical combustion on Earth and (2) spacecraft fire prevention through innovative research focused on materials flammability.

Antimicrobial Coatings (Boeing Environment Responding Antimicrobial Coatings):  Per standard procedure, the crew touched both the coated and uncoated coupons and took photos for this long-term investigation.            Boeing Environment Responding Antimicrobial Coatings tests have antimicrobial coatings 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 create the possibility of contaminating other planetary bodies. The samples will remain in space for approximately six months, then return to Earth for analysis.

GRIP:  A crewmember performed the 3rd part of GRIP in the supine position (3 out of 3). The GRIP experiment studies the long-duration spaceflight effects on the abilities of human subjects that regulate the grip force and upper limbs trajectories when manipulating objects during different kind of movements including: oscillatory movements, rapid discrete movements and tapping gestures.

MSRR-1 (Materials Science Research Rack-1) MSL Chamber Lid Inspection and Cleaning:  The crew opened the chamber lid and inspected the lid seal for any foreign debris. The Materials Science Laboratory (MSL) is used for basic materials research in the microgravity environment of the International Space Station (ISS). The MSL can accommodate and support diverse Experiment Modules. In this way, many material types, such as metals, alloys, polymers, semiconductors, ceramics, crystals, and glasses, can be studied to discover new applications for existing materials and new or improved materials.

Phospho-aging:  Crewmembers performed urine and blood collection and processing of samples in support of the Phospho-aging. Phospho-aging Mechanism of Accelerated Aging Under Microgravity (Phospho-aging) examines the molecular mechanism behind aging-like symptoms, such as bone loss and muscle atrophy, that occur more rapidly in microgravity.  Using analysis of human premature-aging syndromes (progeria) in mouse models, scientists identified calciprotein particles (CPPs) as a pro-aging factor in mammals.  CPPs behave like a pathogen, inducing chronic inflammation and systemic tissue damage that could be the mechanism behind accelerated aging in space.

Standard Measures:  Crewmembers completed questionnaires in support of the Standard Measures study. 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.

Story Time From Space-8 Heat Transfer Demo: Software installation incomplete. Ground Teams reviewing software. Story Time From Space combines science literacy outreach with simple demonstrations recorded aboard the International Space Station (ISS). Crew members read five science, technology, engineering and mathematics-related children’s books in orbit, and complete simple science concept experiments. Crew members videotape themselves reading the books and completing demonstrations. Video and data collected during the demonstrations are downlinked to the ground and posted in a video library with accompanying educational materials.


Portable Breathing Apparatus (PBA) Reducer-Cylinder Assembly (RCA) Elevated Leakage: Photo assessments of a routine Portable Emergency Provisions (PEPs) inspection showed that one Air and one Oxygen RCA are considered expired due to low pressure, which was unexpected. Ground teams are assessing on-orbit impacts.

Crew Alternate Sleep Accommodation (CASA) Airflow Measurement: Today the crew performed additional airflow measurements in the CASA volume with the CASA doors closed. The measurements were used to verify ground analysis.

Completed Task List Activities:

  • None

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

  • High Rate Data Downlink (HRDL) via Layer 2 Ethernet Hub and Multiplexer (LEHX) for EFU Adapter High Definition TV Camera System
  • ACME Images Downlink Commanding
  • HD-VCA Activation Setup & Deactivation for Analogue-Mode

Look Ahead Plan:

Thursday, April 29 (GMT 119)

  • GRASP Seated session (ESA)
  • Phospho Aging Blood and Urine collect (JAXA)
  • Combustion Integrated Rack Manifold #4 Bottle Replacement
  • Actiwatch Plus HRF Rack 1 Setup
  • Behavioral Core Measures ROBoT-r Testing
  • EXPRESS Rack 10 Payload MTL Flow Rate Adjust
  • Repository
  • Food Acceptability (NASA)
  • Food Physiology Diet Brief (NASA)
  • Spaceborne Computer-2 Installation


  • In Flight Maintenance (IFM) Waste and Hygiene Compartment (WHC) Pre-Treat Tank Remove & Replace
  • ACME Controller Replace 1
  • Regenerative Environmental Control and Life Support System (ECLSS) Recycle Tank Drain

Friday, April 30 (GMT 120)

  • Crew Off-Duty Day
  • Antimicrobial Coatings Touch
  • Food Acceptability Survey
  • Food Physiology


  • Crew Off-Duty Day

Saturday, May 1 (GMT 121)

  • Urine Setup (NASA)


  • In Flight Maintenance (IFM) KU Comm Unit Cable Swap
  • Crew Off-Duty Day

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

  • Actiwatch Plus Watch Doff
  • Air conditioner [СКВ1] compressor R&R, equipment gathering. Tag-up with specialists
  • Antimicrobial Coatings Touch
  • Bio-Monitor Hardware Stow
  • Campout Sleeping Bag Deploy and Stow
  • Comm reconfigure for nominal ops
  • Crew Alternate Sleep Accommodation (CASA) Duct Questionnaire
  • Crew Alternate Sleep Accommodation (CASA) Installation
  • Cygnus Air Duct Inspection
  • Environmental Health System (EHS) Total Organic Carbon Analyzer (TOCA) Sample Data Record
  • Environmental Health System (EHS) Total Organic Carbon Analyzer (TOCA) Water Recovery System (WRS) Sample Analysis
  • Handover of Increment 65 Crew
  • HRF Generic MELFI Sample Retrieval And Insertion Operations
  • HRF Generic Saliva Collection 10 Minutes
  • HRF Generic Saliva Collection Setup
  • HRF Generic Urine Collection Urine Containment Bag Stow and Retrieval
  • In Flight Maintenance (IFM) Lab FWD Port Intermodular Ventilation (IMV) Fan Cleaning
  • ISS Crew Adaptation
  • ISS Crew Orientation
  • ISS HAM Kenwood Radio Power Up
  • MRM1 comm config
  • MSL SCA Exchange
  • On Board Training (OBT) ROBoT T&C Self Study
  • PAO event, prep. TV report
  • Phospho-Aging Generic Frozen Blood Collection Setup
  • Phospho-Aging Generic MELFI Sample Insertion Operations
  • Phospho-Aging Generic MELFI Sample Retrieval and Insertion Operations
  • Phospho-Aging Generic Urine Collection Male
  • Phospho-Aging HRF Centrifuge Frozen Blood Collection – Operator
  • Photo/TV Module Imagery
  • Program Management/ISS Crew Conference
  • Roll Up and Stow Sleep Bag
  • Setup transfer from EDV to RST
  • Standard Measures Post-Sleep Questionnaire
  • Story Time 8 Thermal Balance Software Install
  • Terminate transfer from EDV to RST