ISS Daily Summary Report – 8/25/2020


Spacecraft Atmosphere Monitor (SCRAM): The crew removed the MCA (Major Constituent Analyzer) plug from the SCRAM and powered it up.  The MCA plug is used to protect the SCRAM’s sensor when the unit is powered off.  SCRAM demonstrates the capabilities of a small, reliable, portable gas chromatograph mass spectrometer instrument aboard the ISS to conduct major and minor elements of air measurement (Nitrogen, Oxygen, Carbon Dioxide, Methane, Water, etc). The instrument transmits data back to the ground research team every two seconds, providing a continuous analysis to the ground research team. It has a mass of less than 9.5 kg, and consumes less than 40 watts of power in its nominal configuration.


ISS Leak Isolation Ops: The crew ingressed the USOS segment today after spending an extended weekend in the Russian Segment to allow ground teams to monitor module pressures. The crew closed several module hatches on GMT 234 as part of a leak isolation test.  The Environmental Control and Life Support (ECLS) community has been tracking an increase in nominal atmosphere leakage since October 2019. The motivation for finding the leak is to reduce the amount of consumables required to maintain the ISS pressure. Following USOS ingress, the crew reactivated the Waste & Hygiene Compartment (WHC) for operations and restowed items that were transferred to the Russian segment during the USOS isolation period.

Completed Task List Activities:

  • None

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

  • Ground Support for USOS Ingress
  • MCC Swing to BCC Ops

Look Ahead Plan

Wednesday, 8/26 (GMT 239)

  • CIR-ACME Bottle Exchange


  • Crew Handover Conference 

Thursday, 8/27 (GMT 240)

  • CIR/ACME Configure for BRE
  • Food Physiology
  • GLACIER Desiccant Swap 


  • TOCA WRS Analysis/Data Record

Friday, 8/28 (GMT 241)

  • CIR-Hardware Return
  • MSRR/MSL SCA Exchange
  • Radi-N2 Deploy 


  • HMS AED Inspect 

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

  • ТБУ (Universal Bioengineering Thermostat). Checking ТБУ-В No.07 thermostat temperature and unobstructed area near ТБУ-В inlet/outlet vents
  • Combining RS and USOS volumes
  • Regeneration of Micropurification Unit (БМП) Ф1 and Ф2 cartridges
  • URAGAN. Earth imagery using still camera
  • USOS Ingress
  • DC1 + Progress 444 (76P) Hatch Opening
  • MRM1 Hatch Opening
  • PROFILAKTIKA-2. Health check of electro-pneumatic unit from [КОР-01-Н] set
  • Galley Reactivation
  • Potable Water Dispenser Ambient Water Line Flush
  • Waste & Hygiene Compartment (WHC) Reactivation
  • Introducing updates to the Descent ODF and on Soyuz 745 Samsung PC
  • SM Atmosphere analysis using Freon Leak Analyzer/Detector (ФИТ)
  • USOS Item Transfer
  • Comm Configuration from MRM2
  • Connecting SM РО-ПХО PEV valves and MRM2 Pressure Relief Valves (КСД) control circuits, and MRM2 pressure control circuits from SM
  • Testing pressure equalization valves (PEV) and pressure relief valves (КСД); measuring pressure in [РО] and SM ПхО from EVA Support Panels (ПОВ) in MRM2
  • Spacecraft Atmosphere Monitor Power On
  • USOS Isolation Restow
  • VIZIR. Session with Photo image coordinate referencing – smart drawers system (СКПФ-УМ)
  • Transfer of kits with tubes for FGB from Node 1 to RS
  • Countermeasures System (CMS) Cycle Ergometer w/Vibration Isolation & Stabilization (CEVIS) Isolator Inspection
  • Air sample collection using Draeger tube air sampler (ИПД) in SM for CO
  • Countermeasures System (CMS) Advanced Resistive Exercise Device (ARED) Cylinder Flywheel Evacuation
  • SM air sampling using АК-1М sampler
  • UF-ATMOSFERA. Hardware and electrical connections setup; PL Activation
  • Spacecraft Atmosphere Monitor MCA Plug Remove