Circadian Rhythms: A crewmember removed the Armband Monitor and the Thermolab Unit mounted to their belt, completing 36 hours of monitoring for the Circadian Rhythms investigation. Circadian Rhythms investigates the role of synchronized circadian rhythms, or the “biological clock,” and how it changes during long-duration spaceflight. Researchers hypothesize that a non-24-hour cycle of light and dark affects crew members’ circadian clocks. The investigation also addresses the effects of reduced physical activity, microgravity and an artificially controlled environment. Changes in body composition and body temperature, which also occur in microgravity, can affect crew members’ circadian rhythms as well. Understanding how these phenomena affect the biological clock will improve performance and health for future crew members.

Utilization Preparations for SpaceX-12 Arrival: In preparation for SpX-12 arrival scheduled for August 16th, crewmembers relocated all three Space Automated Bioproduct Lab (SABL) units and the Multi-Purpose Small Payload Rack (MSPR) Experiment Laptop Terminal. They also removed the Phase Change Heat eXchanger (PCHX) locker for return.

Rodent Research-5 (RR-5) Systemic Therapy of NELL-1 for Osteoporosis: The crew completed a final inventory audit for RR-5. They then stowed some items and trashed others.

Mobile Servicing System (MSS) Operations: Yesterday and overnight, Robotics Ground Controllers translated the Mobile Transporter (MT) from Worksite 7 (WS7) to WS3. The team then powered up the MSS and maneuvered the Space Station Remote Manipulator System (SSRMS) and the Special Purpose Dexterous Manipulator (SPDM) to use SPDM Arm2 to transfer the empty Main Bus Switching Unit (MBSU) Flight Releasable Attachment Mechanism (FRAM) from SPDM Enhanced Orbital Replacement Unit (ORU) Temporary Platform (EOTP) Side 2 to External Stowage Platform 2 (ESP2) Site 4. Finally, controllers stowed the SPDM on Mobile Base System (MBS) Power Data Grapple Fixture 2 (PDGF2).

Ku Band Contingency Command and Telemetry (CCT) Checkout: In response to the loss of S-Band redundancy due to the loss of power to the S-Band-2 transponder, ground teams completed a checkout of the Ku-Band CCT command and voice capability. During the test all control centers, including Sp-X Mission Control, successfully sent test commands to ISS via Ku-Band. Additionally, Ku-Band voice between ISS and MCC-Moscow was verified in the event this is needed during the upcoming Russian Extra-Vehicular Activity (EVA).

Today’s Planned Activities

All activities were completed unless otherwise noted.

Video recording for KOROLYOV TV channel

Greetings Video Recording

Test video recording for RT channel

Preparation of Reports for Roscosmos web site and social media

URAGAN. Observation and Photography

ECON-M. Observation and photography

Health Maintenance System (HMS) OCT Setup

Circadian Rhythms Deinstrumentation w. Armband

JEM Airlock Press

Space Automated Bioproduct Lab Unit Relocate

Photography of the БД-2 treadmill belt edge and screen form of Belt tab

Verification of ИП-1 Flow Sensor Position

Phase Change HX Circuit Breaker OFF

Measuring CO level in RS using US portable CSA-CP device

Fine Motor Skills Experiment Test – Subject

Fine Motor Skills Historical Documentation Photography

Filling (separation) of ЕДВ (КОВ) for Elektron or ЕДВ-СВ.

JEM Airlock Leak Check

EVA Medical Kit Configuration

Health Maintenance System (HMS) – OCT Exam

Preparing Orlan Comm and Telemetry Assets

Checkout of BETA-08 Data Output Device (УСИ) using Gamma-1M Equipment

Combustion Integrated Rack Alignment Guide Removal

Orlan and БСС Telemetry Check. Orlan comm check and medical parameter test

JEM TEPC Ethernet Cable Reconfiguration

Environmental Health System (EHS) – Coliform Water Sample Analysis 44 +/- 4 hours post processing

Node 2 Nadir Hatch Unlatch

CMS Max CEVIS with PPFS Power Up

Comm reconfig into initial after Orlan comm. check

Kazbek–УМ Fit Check in Soyuz 735

Robotics Work Station (RWS) Display and Control Panel (DCP) Powerup

Health Maintenance System (HMS) – OCT Exam

MSPR ELT Relocation

Max Cycle Ergometer w/Vibration Isolation & Stabilization (CEVIS) Portable PFS Subject

Atmosphere Control and Supply (ACS) Nitrogen Manual Valve Open/Close

Handover of Increment 52 Crew

Ku-band Contingency Command and Telemetry Checkout

Max Cycle Ergometer w/Vibration Isolation & Stabilization (CEVIS) Portable PFS Partial Stow

Circadian Rhythms Armband Stow

Health Maintenance System (HMS) – OCT Exam

Symbolic Activity

Environmental Health System (EHS) – Microbial Air Sampler (MAS) Kit Sample Collection

Handover of Increment 52 Crew

Phase Change HX Locker Remove

Payload NAS Hard Drive Swap

Environmental Health System (EHS) – Surface Sample Kit (SSK) Collection/Incubation

Health Maintenance System (HMS) OCT Stow

Environmental Health System (EHS) – Formaldehyde Monitoring Kit (FMK) Stow Operation

Health Maintenance System (HMS) Fundoscope Setup

Rodent Research MELFI Insert [ACTIVE]

Space Automated Bioproduct Lab 3, Unit Relocation

Inventory Management System (IMS) Conference

Health Maintenance System (HMS) Fundoscope Prep

ISS Crew Orientation

Health Maintenance System (HMS) CMO – Fundoscope

Health Maintenance System (HMS) Eye Exam – Fundoscope

Max Cycle Ergometer w/ Vibration Isolation & Stabilization (CEVIS) Portable PFS Partial Set Up

Health Maintenance System (HMS) Fundoscope Tear Down and Stow

Completed Task List Items

None

Ground Activities

All activities were completed unless otherwise noted.

50S EHDC Survey

SSRMS walkoff to N2 [ACTIVE]

Ku-Band Contingency Command and Telemetry Checkout

Three-Day Look Ahead:

Friday, 08/11: CMS MAX CEVIS, SPHERES ops, 51S unpack, mobiPV checkout

Saturday, 08/12: Crew off duty, housekeeping

Sunday, 08/13: Crew off duty

QUICK ISS Status – Environmental Control Group: