ISS Daily Summary Report – 4/27/2020


Space Fibers: The crew performed hardware gather and setup in the Microgravity Science Glovebox for the Space Fibers Reflight mission. Manufacturing Fiber Optic Cable in Microgravity (Space Fibers) evaluates a method for producing fiber optic cable from a blend of zirconium, barium, lanthanum, sodium and aluminum, called ZBLAN, in space. ZBLAN produces glass one hundred times more transparent than silica-based glass, exceptional for fiber optics. Microgravity suppresses two mechanisms that commonly degrade fiber, and previous studies showed improved properties in fiber drawn in microgravity compared to that fabricated on the ground.


Treadmill 2 (T2) Annual Maintenance: Today the crew completed the yearly T2 inspection. During this task, the crew inspected the isolators, motor belt, bottom snubbers, treadmill slats and screws, and the bungee shackle key mount witness marks.  They also cleaned the bearing house, the closeout panels, and vacuumed the filter screen as well as inside the rack and around the treadmill. This is nominal periodic corrective maintenance.  An unmanned activation and checkout was completed after the maintenance.

Acoustic Monitor Recording of T2 Audio: Today the crew also performed an Acoustic Monitor recording of the unmanned activation and checkout protocol that is performed prior to and immediately following the T2 yearly maintenance. Two Acoustic Monitors were used to record audio of the T2 at each tread speed.

Completed Task List Activities:

  • Columbus D1 Rack Bags filling
  • Extravehicular Activity (EVA) Alpha Magnetic Spectrometer (AMS) Cleanup
  • Cleaning up ECOKs and relocating outside of Airlock
  • Express Rack 6 Locker Removal
  • iPad FIT Update
  • IP Concatenation Box LAN Cable 2 Check
  • Payload MELFI Retrieve
  • Rodent Research MELFI Sample Locate
  • Space Automated Bioproduct Lab, CO2 Incubator Controller Valve Close
  • Unpack USOS items launched on 75P
  • Glacier 3 Desiccant Swap
  • Polar 4 Desiccant Swap
  • SSC2 Shell Swap
  • Warehouse CTB Locate
  • ESA AstroPi Blue SD Card Adapter Wanted Poster
  • Electrostatic Levitation Furnace (ELF) Saver Cable Removal
  • Mesh Cleaning on 120 TO 28 VDC Converter
  • EXPRESS Laptop Computer 4 Shell Change

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

  • Oxygen Generator Assembly (OGA) Pump Speed Adjustment
  • Ground Support for T2 Annual Maint
  • ATS PPL Load
  • JEM Robotics Ops

Look Ahead Plan

Tuesday, 4/28 (GMT 119)

  • J-SSOD-13 Deploy Obs (JAXA)
  • Slingshot Test (NASA)
  • CIR ACME controller replace (NASA)


  • CBM CPA Removal
  • Acoustic Monitor Setup 

Wednesday, 4/29 (GMT 120)

  • Astrobee Battery change (NASA)
  • VEGGIE PONDS Facility Clean (NASA)
  • RED-EYE temp Stow (NASA)


  • Acoustic Monitor Setup – Static Msrmts
  • EVA Loops Scrubs – 3004/3008
  • O-OHA Test 

Thursday, 4/30 (GMT 121)

  • Astrobee Localization and Mobility ops (NASA)
  • CBEF 2nd cleaning post MHU-5 (JAXA)
  • Space Fiber Stow (NASA)
  • Food Physiology (NASA)
  • VEGGIE PONDS Facility deact (NASA)
  • ISS HAM Pass (NASA)


  • JEM CTB Relocate
  • EHS TOCA Water Sample Analysis
  • Acoustic Monitor Data Transfer and Stow

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

  • Auxiliary Computer System [ВКС] Laptops Antivirus Update
  • JEM Temporary Stowage
  • Space Fibers Hardware Gather
  • Space Fibers Hardware Set Up in MSG Work Volume
  • Countermeasures System (CMS) Treadmill 2 System (T2) Monthly Inspection
  • Station Support Computer (SSC) 9 Laptop Relocate
  • Treadmill  2 (T2) Yearly Maintenance
  • Photo/TV Treadmill 2 (T2) Activation and Checkout (ACO) Video Setup & Teardown
  • Station Support Computer (SSC) Relocate
  • Acoustic Monitor Setup for Static Measurements
  • Countermeasures System (CMS) Treadmill 2 (T2) Unmanned Activation and Checkout (ACO)
  • Acoustic Monitor Data Transfer
  • Physical Exercise Data Downlink via ОСА
  • Auxiliary Computer System [ВКС] Laptops Antivirus Scan Preparation