USOS Extra Vehicular Activity (EVA) #46: Randy Bresnik (as EV1) and Joe Acaba (as EV2) successfully performed US EVA #46 with a Phased Elapsed Time (PET) of 6 hrs 49 min. The primary goals of the EVA were to Remove and Replace (R&R) a fuse in the Special Purpose Dexterous Manipulator (SPDM) Enhanced ORU Temporary Platform (EOTP), install an External High Definition Camera (EHDC) at the Camera Port 3 (CP3) location, and install a new Camera/Light Assembly (CLA) on the Space Station Remote Manipulator System (SSRMS) Latching End Effector A (LEE A). The crew also removed Multi-Layer Insulation (MLI) from an Main Bus Switching Unit (MBSU) and tied down an MLI Skirt on a spare Direct Current Switching Unit (DCSU). The crew also performed the following get ahead tasks: Lubrication of the LEE A Linear Bearings, Prep of two Pump Modules (PMs) by removing the MLI straps and tape used for launch loads, and T-Handle installation on the Port Radiator Grapple Bar (RGB). Circadian Rhythms: The 51S crewmember removed and stowed the Double Sensors and Thermolab Unit equipment that was used to complete a 36 hour Circadian Rhythms session that began on Wednesday. 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 crewmembers’ 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 crewmembers’ circadian rhythms as well. Understanding how these phenomena affect the biological clock will improve performance and health for future crewmembers. Space Headaches: Today a 51S crewmember completed a weekly questionnaire for the ESA Space Headaches investigation. The Space Headaches investigation collects information that may help in the development of methods to alleviate associated symptoms and improvement in the well-being and performance of crewmembers in space. Headaches during space flight can negatively affect mental and physical capacities of crewmembers that can influence performance during a space mission. Today’s Planned Activities All activities were completed unless otherwise noted. Life On The Station Photo and Video Glisser GoPro HERO3 battery charge Roskosmos and social media features preparation URAGAN. Observation and photography ECON-M. Observation and photography Extravehicular Activity (EVA) Reminder for EVA In-Suit Light Exercise (ISLE) Preparation ISS HAM Radio Power Down in Columbus USOS Extravehicular Activity (EVA) Communication Configuration ISS HAM Radio Power Down in Service Module EVA COTS UHF Communication Unit (CUCU) Verify off USOS Window Shutter Close Extravehicular Activity (EVA) In-Suit Light Exercise (ISLE) Preparation Daily Planning Conference MORNING PREPARATION WORK PAO hardware setup. Audi/Video check with Glavny (Ku + S-band) Crew Prep for PAO Circadian Rhythms Deinstrumentation TV Conference with the participants of XXV International Space Olympiad (Ku + S-band) MICROVIR. Photography of Cassette-M No.3-3, No.3-4 upper cells. Squeezing out and photography of bottom cells. Tagup with specialists as necessary Extravehicular Mobility Unit (EMU) Purge MICROVIR. Glovebox-S Closeout Ops Extravehicular Mobility Unit (EMU) In-Suit Light Exercise (ISLE) Prebreathe Monitoring shutter closure on SM windows 6, 8, 9, 12, 13, 14. Note 5 COSMOCARD. Setup. Starting 24-hr ECG Recording COSMOCARD. Photography of the Experiment Session Portable Onboard Computers (POC) Dynamic Onboard Ubiquitous Graphics (DOUG) Setup Extra-Vehicular Mobility Unit (EMU) In-Suit Light Exercise Prebreathe BIOPLENKA. Removal of Cryogem-03 after Completion of the Experiment MICROVIR. Photography of bottom cells Crewlock Depress Tightening Fast-Removal Screw Clamps on SM Aft – Progress 436 Interface Photography of Plume Impingement and Deposit Monitoring Unit (БКДО) position on MRM2 through SM window No.13, preparation Crewlock Post Depress Crewlock Egress Photography of Plume Impingement and Deposit Monitoring Unit (БКДО) position on MRM2 through SM window No.13 Photography of Plume Impingement and Deposit Monitoring Unit (БКДО) position on MRM2 through SM window No.13, Closeout Ops Enhanced ORU Temporary Platform (EOTP) Fuse R&R SSRMS EVA Support SSRMS Setup for C9 Ops SSRMS EVA Support CP3 External High Definition Camera (EHDC) Install Main Bus Switching Unit (MBSU) Multi-Layer Insulation (MLI) Remove Draining Disinfectant into ЕДВ and SM Rodnik Water Tank 1 bladder compression MICROVIR. Photography of bottom cells Progress 437(DC1) priority and US cargo items transfers and IMS Ops Direct Current Switching Unit (DCSU) Skirt Tie down SSRMS Cleanup Camera Light Assembly (CLA) R&R СОЖ maintenance IMS Update SSRMS Powerup SM ПФ1-4 Dust Collector Filter Cartridge Changeout (ФГБ1ПГО_2_224_1, bag 436-26 (00071452R)). Discard the removed items. Reflect changes in IMS) MICROVIR. Photography of bottom cells Articulating Portable Foot Restraint (APFR) Cleanup Crewlock Ingress Evening Preparation Work EVA Glove Photo Setup Crewlock Pre Repress Crewlock Repress Extra Vehicular Activity (EVA) Post-EVA Activities MICROVIR. Photography of bottom cells Cupola Window Shutter 4 Close Space Headaches – Weekly Questionnaire Post Extravehicular Activity (EVA) Communication Deconfiguration SM Water Tank 1 Bladder Compression, Cleanup Ops EVA Glove Photo Downlink Extravehicular Activity (EVA) Camera Image Downlink Photo/TV Extravehicular Activity (EVA) GoPro Downlink Completed Task List Activities Wanted Poster: (20-100 in-oz) Trq Driver, 1/4 Drive ECG Device, ECG Lead Set Cable, and ECG USB Charge Cable Audit Ground Activities All activities were completed unless otherwise noted. SSRMS Powerup EVA Support Three-Day Look Ahead: Saturday, 10/21: EMU Water Charge, EVA Debrief, Airlock Reconfig Sunday, 10/22: Off duty Monday, 10/23: KE2M Installation on JEMAL Slide Table, World in 90 Minutes Photography, ENERGY, CQ Battery Replacement QUICK ISS Status – Environmental Control Group: Component Status Elektron On Vozdukh Manual [СКВ] 1 – SM Air Conditioner System (“SKV1”) Off [СКВ] 2 – SM Air Conditioner System (“SKV2”) Off Carbon Dioxide Removal Assembly (CDRA) Lab Standby Carbon Dioxide Removal Assembly (CDRA) Node 3 Operate Major Constituent Analyzer (MCA) Lab Idle Major Constituent Analyzer (MCA) Node 3 Operate Oxygen Generation Assembly (OGA) Process Urine Processing Assembly (UPA) Standby Trace Contaminant Control System (TCCS) Lab Full Up Trace Contaminant Control System (TCCS) Node 3 Off