Solidification Using Baffles in Sealed Ampoules (SUBSA): Today the crew deactivated SUBSA, exchanged sample ampoules, and started SUBSA processing of the new sample. The objective of the SUBSA investigation is to advance understanding of the processes involved in semiconductor crystal growth. It offers a gradient freeze furnace for materials science investigations that can reach 850°C. Samples are contained in transparent quartz or ceramic ampoules with high definition video imaging available in real-time along with remote commanding of thermal control parameters.

Cold Atom Lab (CAL): The crew installed the CAL Science Instrument and Power Electronics (SIPE) into Express Rack 7, connected the SIPE to the Moderate Temperature Loop, and completed configuration of the SIPE for operations today. The CAL produces clouds of atoms that are chilled to about one ten billionth of a degree above absolute zero — much colder than the average temperature of deep space. At these low temperatures, atoms have almost no motion, allowing scientists to study fundamental behaviors and quantum characteristics that are difficult or impossible to probe at higher temperatures. In microgravity, researchers may be able to achieve even colder temperatures than what is possible on the ground, and observe these cold atom clouds for longer periods of time. CAL was activated from the ground and the CAL team is now starting a 6 week checkout of the payload.

Japanese Experiment Module (JEM) Camera Robot: The crew completed checkout of the JEM Camera Robot today in the JEM using varying light levels and a target marker on the JEM Airlock. The JEM Camera Robot is a free-flying camera robot that provides real time video downlink and photographs. It is expected to reduce the crew time requirements to support video recording of activities, especially in the blind spots of existing JEM internal cameras.

Lighting Effects: The crew obtained light meter readings in the Japanese Experiment Module (JEM) today. The Lighting Effects investigation studies the impact of the change from fluorescent light bulbs to solid-state light-emitting diodes (LEDs) with adjustable intensity and color and aims to determine if the new lights can improve crew circadian rhythms, sleep, and cognitive performance.

Correction: The entry in yesterday’s IMC Daily Summary misstated return/trashing of EMCS components in SpX-15 and OA-9. The correct entry is: European Modular Cultivation System (EMCS): The crew removed ESA’s EMCS from EXPRESS Rack 3 today and de-assembled the hardware. The EMCS Holding Structure will be trashed with the Cygnus vehicle and other EMCS parts will be returned in the SpaceX-15 vehicle.

External TV Camera Group (ETVCG) Video Camera Luminaire (VCL) Bulb R&R: Today the crew replaced the primary metal halide light bulb in the ETVCG light that is scheduled to be taken outside and installed during next week’s US EVA. Following the bulb change, crew utilized a newly flown VCL test cable to perform a functional test of the assembly; both the new bulb and the backup bulb performed nominally during this checkout.

Orbital ATK (OA)-9 Cargo Status: After completing 10 hours of cargo operations yesterday, and additional work today, the crew has completed a total of 34 hours of cargo operations since last Friday. Cargo specialist estimate approximately 1.0 hour of cargo operations remain to complete Cargo Message #1. Cargo Message #1 will unload the Cygnus vehicle and load about 1/3 of the trash scheduled for disposal on the vehicle.

Today’s Planned Activities:

All activities are complete unless otherwise noted.



HRF Generic Saliva Collection

IMS Update

Making a documentary about life onboard the ISS

R PAO event report preparation

Video Recording of Greetings

HRF Generic Sample MELFI Insertion Operations

Tropical Cyclone Untended Operations

JPM1OF6 Lamp Housing Assembly (LHA) Replacement

COSMOCARD. Preparing for and Starting 24-hr ECG Recording

Powerdown Deck Crew Quarters Laptop

Compound Specific Analyzer-Combustion (CSA-CP) Checkout

Clearing Psychological Support Files from Soyuz 737 Samsung tablet prior to undocking.

RADIOSKAF. Gathering and Assembly of Tanyusha-ЮЗГУ-3 and Tanyusha-ЮЗГУ-4 satellites.

RADIOSKAF. Photo/Video Ops

Powerdown Crew Quarters Laptop

Recycle Tank Drain Part 2

MERLIN1 Status Check

Powerdown Deck Crew Quarters Laptop

JEM OA9 Stowage Reconfiguration

STaARS Cryotube Kit MELFI Insertion #1

Tropical Cyclone Hardware Closeout

LBNP Training (PRELIMINARY).

VEGGIE Facility Removal From EXPRESS Rack

Cold Atom Lab Installation

SM Air Sampling for CO using ИПД Samplers

Soyuz 737 Return Hardware Stowage Ops

Collecting SM and FGB Air Samples Using АК-1М Sampler

Replacing СРВ-К2М (БКО) Multifiltration Unit. Install unit No.1702087 (00071356R), Pre-pack old БКО No.1612085 for disposal via Progress 438

Powerdown Deck Crew Quarters Laptop

Probiotics Item Gathering

Inspection and video recording of ВПТ, ВБП1, ВБП2 Fan Installation Location.

Temp Stowage of H/W for JEM Camera Robot Checkout

Wastewater Storage Tank Assembly (WSTA) Fill

Crew Departure Preparations for Return to Earth

DOSIS 3D Passive Detectors De-Installation from Columbus (10 PDPs and 1 TDP).

DOSIS 3D Passive Detector Pouch handover to Russian crew for download of dosimeters with Soyuz.

XF305 Camcorder Setup

JEM Camera Robot Checkout

CALCIUM. Bioekololgiya Cases No.№13-1 and No.№13-2; Photography, Processing, and Photo Downlink, Pre-pack for Return

External Television Camera Group (ETVCG) Bulb Remove and Replace

СОЖ maintenance

JEM Camera Robot Checkout Closeout

Lighting Effects Light Meter Setup Alternate

Replaces stowage in JEM that was removed before JEM Camera Robot Checkout

Lighting Effects Light Meter Readings

ISS Crew departure preparation

ISS Food Intake Tracker (ISS FIT)

Lighting Effects Light Meter Stow

VEGGIE1 Facility Removal From EXPRESS Rack

Cold Atom Lab Station Support Computer Relocate Part 2

Charging Soyuz 738 IRIDIUM Phone, start charge

Solidification Using Baffles in Sealed Ampoules Sample Exchange

ISS Medical Accessories Kit (IMAK) Unpack from OA-9

Soyuz 738 IRIDIUM phone charge, battery status check

Soyuz 738 IRIDIUM Phone Charge, Terminate Charge, Teardown

Completed Task List Activities:

None

Ground Activities:

All activities are complete unless otherwise noted.



Starboard FGB Solar Array and TRRJ Survey

CAL install support

Three-Day Look Ahead:

Thursday, 05/31: ER3 IPEHG Install, Soyuz Descent Drill, WRS Pump Roller R&R, PEPS Inspect, WRS transfer pump tubing R&R

Friday, 06/01: CQ Cleaning, RFID Tag Install, EHDC Locking Mechanism Adjust, Change of Command Ceremony

Saturday, 06/02: Weekly Housekeeping, Crew Off-Duty

QUICK ISS Status – Environmental Control Group: