External (EXT) Multiplexer/Demultiplexer (MDM)-1 R&R Extravehicular Activity (EVA): With IV support from Thomas Pesquet, today Peggy Whitson (EV1) and Jack Fischer (EV2) performed a 2 hour 46 minute EVA to Remove & Replace (R&R) the EXT MDM-1 that failed on Saturday, May 20th. While Whitson performed the EXT MDM R&R, Fischer installed the Lab Nadir External Wireless Communications (EWC) Antennas that were deferred from the last EVA.

Solar Array Battery 3A1 Temperatures – On 5/22/17, Battery 3A1 average temperatures peaked above 25°C for three concurrent orbits due to high solar beta, with a maximum average temperature peak of 25.6°C. Per Flight Rule, ground controllers terminated the use of the battery string by turning the Battery Charge Discharge Unit (BCDU) 3A1 converter off and commanding the Fault Isolator (FI) open. There is no impact to downstream loads in this configuration

Today’s Planned Activities

All activities were completed unless otherwise noted.

External Wireless EVA Inhibit

ISS HAM Radio Power Down

EVA COTS UHF Communication Unit (CUCU) Verify off

USOS Window Shutter Close

Extravehicular Activity (EVA) In-Suit Light Exercise (ISLE) Preparation

Comm configuration for EVA

Regeneration of Micropurification Unit (БМП) Ф2 Cartridge (start)

Recharging Soyuz 733 Samsung PC Battery

ISS Crew departure preparation

Update BRI Configuration File to Version 6.3

Recharging Soyuz 735 Samsung PC Battery

Extravehicular Mobility Unit (EMU) Purge

LBNP Training (PRELIMINARY)

Extravehicular Mobility Unit (EMU) In-Suit Light Exercise (ISLE) Prebreathe

Soyuz 733 IRIDIUM phone recharge, setup, start charge (ФГБ1ПГО_2_224_1, 0.5 СТВ 1017 (002857J), Soft Container (00044322R))

Soyuz 733 Recharging IRIDIUM Phone battery charge status

Prebreathe in EMU

БРП-М water sampling to drink bags

Soyuz 733 IRIDIUM phone recharge, terminate charge

Equipment Stowage under Soyuz 733 center seat Note 7

Sampling condensate water [КАВ] before СРВ-К2М Gas-liquid mixture filter (ФГС) to drink bags, end

Crewlock Depress

СВО-ЗВ water sampling to Russian drink bags

Crewlock Egress

Terminate Soyuz 735 Samsung PC Battery Charge (as necessary)

Replace Failed EXT MDM

Install Lab EWC Antennas

KORREKTSIYA. Logging Liquid and Food (Medicine) Intake

Collecting condensate water samples [КАВ] up to СРВ-К2М БКО, equipment setup, sampler installation

Crewlock Ingress

Crew Departure Prep

MORZE. Psycho-physiological Evaluation: Strelau Test

Crewlock Ingress

Soyuz 735 IRIDIUM phone charge

EVA Glove Photo Setup

Crewlock Pre Repress

Soyuz 735 IRIDIUM phone charge, terminate charge, teardown of the setup Stow: ФГБ1ПГО_2_224_1, 0.5 СТВ 1017 (002857J), Soft Container (00044322R)

Crewlock Repress

Extra Vehicular Activity (EVA) Post-EVA Activities

Collecting condensate water samples [КАВ] upstream of СРВ-К2М БКО, sampler replacement

Extravehicular Mobility Unit (EMU) Water Recharge

Extra Vehicular Activity (EVA) Post-EVA Activities

Return to nominal comm configuration after USOS EVA

EVA Glove Photo Downlink

Extravehicular Activity (EVA) Camera Image Downlink

Photo/TV Extravehicular Activity (EVA) GoPro Downlink

Photo/TV Extravehicular Activity (EVA) Camera Disassembly

External Wireless Instrumentation System (EWIS) Network Control Unit (NCU) Enable

MORZE. Closeout Ops

KORREKTSIYA. NEUROIMMUNITET. Experiment setup

Terminate Soyuz 733 Samsung PC Battery Charge (as necessary)

Sampling condensate water [КАВ] upstream of СРВК-2М БКО, removing sampler, equipment disassembly

OsteoOmics Saline Kit Relocate

Meteor Shutter Open

Completed Task List Items

Veg-03 Plant Water/Photo

iPad Certificate Verification

Grasp Big Picture [from tomorrow’s timeline]

Dragon Rendezvous CBT [from tomorrow’s timeline]

Dragon Robotics review [from tomorrow’s timeline]

Ground Activities

All activities were completed unless otherwise noted.

System commanding in support of EVA

High Beta monitoring

Three-Day Look Ahead:

Wednesday, 05/24: Dragon OBT Conf, OsteoOmics, Cubesat Deployer Swap, EVA Debrief, Airlock deconfig

Thursday, 05/25: Body Measures, OsteoOmics, GRASP, Dragon RoBOT OBT, OGS Sensor R&R

Friday, 05/26: OBT Dragon Offset Grapple, EVA loops scrub/conductivity tests, OBT Soyuz drill, GRASP

QUICK ISS Status – Environmental Control Group: