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ISS On-Orbit Status Report

ISS Daily Summary Report – 4/21/2021

Crew-2 Launch Delay: Teams discussed the weather forecast for the Thursday April 22 Crew-2 launch attempt and all concurred with delaying the launch. Winds and wave heights along the ascent corridor, including at the pad and staging areas, are predicted to be unfavorable for Thursday. The new target launch date is Friday April 23 at 4:49AM CT. Docking would occur on Saturday, April 24 at 4:10AM CT.

Payloads

Micro-16: The crew prepared the final group of Micro-16 Session 4 Day 2 samples for microscopy observations. This was the last load and microscopy operations for this experiment. 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.

Myotones: The crew performed Myotones Ultrasound sessions and skin markings measurements. The investigation observes the biochemical properties of muscles (e.g. muscle tone, stiffness, elasticity) during long-term exposure spaceflight environment. Results from this investigation can provide a better understanding of the principles of human resting muscle tone. This could lead to the development of new strategies for alternative treatments for rehabilitation on Earth, as well as for future space missions.

Time Perception in Microgravity: The crew completed setup and experiment session for Time Perception in Microgravity. The accurate perception of objects in the environment is a prerequisite for spatial orientation and reliable performance of motor tasks. The experiment is also fundamental to motion perception, sound localization, speech, and fine motor coordination. It quantifies the subjective changes in time perception in humans during and after long-duration exposure to microgravity.

Systems

Toilet Stall Attachment Mechanism Repair: The crew replaced the tightening knob on two Toilet Stall attachment mechanisms on the starboard-top panel. The original hardware had become non-captive during use and a repair kit was flown on NG-15. One of the two mechanisms was successfully repaired, however, a fastener on the second mechanism failed during closeout of the activity. The Stall was replaced onto the Waste and Hygiene Compartment (WHC) rack and attached with the available hardware. Crew have been advised to avoid applying loads into the Stall while in this interim configuration. Teams are assessing a plan to recover the failed mechanism.

Completed Task List Activities:

  • None

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

  • Payloads ops support
  • MISSE robo ops
  • Crew-1 system checkout

Look Ahead Plan
Thursday, April 22 (GMT 112)

Crew off duty

Payloads:

  • Food Physiology Urine saliva collect (NASA)
  • Standard Measures Blood collect (NASA)

Systems

  • Dragon tablet sync
  • Weekly housekeeping

Friday, April 23 (GMT 113)
Payloads:

  • AC touch (NASA)
  • AWP watch don (NASA)
  • Standard Measures Blood collect (NASA)
  • MAND print removal (NASA)
  • Food Acceptability (NASA)
  • Food Physiology Saliva collect(NASA)

Systems

  • CASA install part 3
  • Crew-2 Dragon arrival
  • ISS Safety Briefing

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

  • HRF Generic MELFI Sample Retrieval And Insertion Operations
  • HRF Generic HRF Centrifuge Setup and Frozen Blood Collection Subject
  • HRF Generic HRF Centrifuge Frozen Blood Collection Operator
  • HRF Generic HRF Centrifuge Frozen Blood Collection Configuration
  • HRF Generic HRF Centrifuge Frozen Blood Collection Spin Conclude
  • iPad WiFi switch to CrewNet network to install Everywer App
  • HRF Generic MELFI Sample Insertion
  • Micro-16 MELFI Media Kit Retrieve
  • HRF Generic HRF Centrifuge Frozen Blood Collection Conclude And Stow
  • Micro-16 Checklist Print
  • Micro-16 Maintenance Work Area Preparation
  • HRF Generic Urine Collection Male
  • MRM1 Comm Config
  • Microscope Reposition Preparation
  • Echo Unit Setup for Myotones experiment
  • HRF Generic MELFI Sample Insertion Operations
  • Myotones Measurements
  • JPM THC b Water Separator R&R
  • Myotones Ultrasound scan using ECHO Unit
  • Comm reconfig for nominal ops
  • Myotones Device Data Transfer
  • XF305 Camcorder Setup [Deferred]
  • Solid Combustion Experiment Module (SCEM) Experiment LAN Cable Reconfiguration [Deferred]
  • Dragon Multi-Port Charger Relocate
  • Countermeasures Systems (CMS) Exercise Equipment Gather
  • Crew Departure Preparations for Return to Earth
  • Regenerative Environmental Control and Life Support System (ECLSS) Recycle Tank Drain
  • iWatch Charge for SpX CREW DRAGON
  • 63S Cargo Restow
  • Regenerative Environmental Control and Life Support System (ECLSS) Recycle Tank Drain Part 2
  • Health Maintenance System (HMS) ISS Food Intake Tracker (ISS FIT)
  • HRF Generic Urine Collection Male
  • Micro-16 Experiment Setup
  • Environmental Health System (EHS) Total Organic Carbon Analyzer (TOCA) Water Recovery System (WRS) Sample Analysis
  • HRF Generic MELFI Sample Retrieval And Insertion Operations
  • Micro-16 Final Loading Operations
  • EveryWear App Configuration
  • Micro-16 Microscopy Operations
  • Atmosphere Control and Supply (ACS) Nitrogen Oxygen Recharge System (NORS) Low Pressure Oxygen Supply
  • Crew Dragon Tablet Sync
  • Mouse Transfer Box Gather
  • Crew Dragon Tablet Stow
  • JPM THC b Water Separator Connector Demate
  • Antimicrobial Coatings Touch
  • Micro-16 Final Loading Operations
  • Time experiment science
  • HRF Generic Urine Collection Male
  • HRF Generic MELFI Sample Insertion Operations
  • JPM THC b Water Separator R&R Closeout
  • Food Physiology MELFI Sample Retrieval
  • Food Physiology Fecal Sample Processing
  • In Flight Maintenance Stall Knob Remove & Replace [Aborted]
  • Time experiment science
  • LIGHT INSTALLATION AT JPM1OF7
  • Food Physiology MELFI Sample Insertion 2
  • Food Physiology MELFI Sample Insertion 3
  • Food Physiology Fecal Sample Processing Hardware And Portable Glovebag Stow
  • Micro-16 MELFI Culture Return Bag Insertion
  • Microscope Reposition Post Ops
  • Micro-16 Experiment Stow
  • Regenerative Environmental Control and Life Support System (ECLSS) Recycle Tank Fill Part 3
  • Crew Departure Preparations for Return to Earth
  • HRF Generic Urine Collection Male
  • Echo Unit Stowage
  • Astrobee Off
  • HRF Generic MELFI Sample Retrieval And Insertion Operations
  • Crew Departure Preparations for Return to Earth
  • Remove SpX-CREW DRAGON iWatch from charger
  • Environmental Health System (EHS) Total Organic Carbon Analyzer (TOCA) Sample Data Record
  • Polar Desiccant Swap
  • Crew time for ISS adaptation and orientation