Solidification Using Baffles in Sealed Ampoules (SUBSA): The crew set up the SUBSA hardware today and installed a calibration 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.

European Modular Cultivation System (EMCS): The crew decommissioned and removed ESA’s EMCS for return on the SpaceX-15 vehicle. The EMCS Holding Structure will be temporarily stowed in the Cygnus vehicle.

Microbial Tracking-2 (MT-2): Today the crew collected saliva and body samples and placed them inside a Minus Eighty Degree Celsius Laboratory Freezer for ISS (MELFI) in support of the Microbial Tracking-2 investigation. MT-2 monitors the different types of microbes that are present on ISS over a 1-year period. After the samples are returned to Earth, a molecular analysis of the RNA and DNA will be conducted to identify the specific microbes that are present on ISS in order to understand the microbial flora diversity on the ISS and how it changes over time.

Orbital ATK (OA)-9 cargo status: The crew is scheduled for ~8 hours of Cygnus Cargo operations today. The crew has completed 13.5 hours of cargo operations since last Friday. Cargo specialist estimate approximately 16 hours 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.

Mobile Servicing System (MSS) Operations: This evening ground robotics controllers will ungrapple the Space Station Remote Manipulator System (SSRMS) from the OA-9 Cygnus spacecraft. Once complete, the SSRMS will backaway from the vehicle, complete a walkoff to Mobile Base System (MBS)-1, and stow the Special Purpose Dexterous Manipulator (SPDM) in preparation for tomorrow‘s planned robotic surveys.

Today’s Planned Activities:

All activities are complete unless otherwise noted.



Microbial Tracking-2 Sample MELFI Retrieval Insert

C/o and Report Results of Virus Scan on Auxiliary Computer System [ВКС] Laptops

Treadmill 2 (T2) SD Card Recovery Pt 2

Transfer Cygnus Cargo Operations

Treadmill 2 (T2) Cable Secure

Microbial Tracking-2 Body Sample Questionnaire

Verification of SM Central Post Laptop connection to wireless SM Ethernet

Wastewater Storage Tank Assembly (WSTA) Fill

GoPro HERO3 Battery charging (6 pc) for Soyuz 737 – init

Microbial Tracking-2 Body Sample Collection

Stowage of Equipment for Disposal on Soyuz 737

Flushing СРВ-К2М Multi-Filtration Unit (БКО) Prior to R&R

STaARS Cryotube Kit removal

Place STaARS samples into Kynar Bag

ИП-1 Flow Sensor Positioning Check

Microbial Tracking-2 Sample MELFI Insert

Probiotics Fecal Sample Operations

URAGAN. Automatic exposure mode setting and testing

Probiotics Fecal Sample MELFI Insertion

VIZIR. Preparation Steps and СКПИ Science Hardware Calibration.

Public Affairs Office (PAO) High Definition (HD) Config JEM Setup

MERLIN 1 Status Check

PAO Preparation

Public Affairs Office (PAO) Event in High Definition (HD) – JEM

Changeout of Dust Filter ПФ1-4 Cartridges in SM (ФГБ1ПГО_4_419_1, bag 437-13 (00072389R)). Removed filters for disposal.

Total Organic Carbon Analyzer (TOCA) Water Recovery System (WRS) Sample Analysis

Food Acceptability Questionnaire Subject

Cold Atom Lab Procedure Review

СОЖ maintenance

Cold Atom Lab Fiber Optic Cable Cleaning Dry Run

ТК 737 Transfers Completion Report

Delta file prep

GoPro HERO3 Battery charging (6 pc) for Soyuz 737 – completion

Solidification Using Baffles in Sealed Ampoules Hardware Setup

IPEHG Installation Review

ISS Crew departure preparation

MPEG-2 TV Downlink Test via KU-band in preparation for Soyuz 739 Docking to the ISS

PEHG Hardware Install

Crew Departure Preparations for Return to Earth

European Modular Cultivation System Decommissioning Procedure Review

VIZIR. Closeout Ops

European Modular Cultivation System Facility Remove from EXPRESS Rack 3

HRF Generic Saliva Collection Setup

Transfer Cygnus Cargo Operations

Cold Atom Lab Hardware Gather

European Modular Cultivation System Facility Remove Assist

Total Organic Carbon Analyzer (TOCA) Sample Data Record

Health Maintenance System (HMS) Personal Medication Stow

Cygnus Cargo Operations Conference

HRF Generic Saliva Collection Setup

RADIOSKAF. Battery charge

STaRS Sample Stow

Completed Task List Activities:

None

Ground Activities:

All activities are complete unless otherwise noted.



Lab MCA Zero Calibration

SSRMS Ungrapple Cygnus

SSRMS Walkoff MBS1

Unstow SPDM

TRRJ Survey

Three-Day Look Ahead:

Wednesday, 05/30: Cold Atom Lab install, ETVCG Bulb R&R, JEM Camera Robot Checkout

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

Friday, 06/01: CQ Cleaning, RFID Tag Install, EHDC Locking Mechanism Adjust, WRS transfer pump tubing R&R, Change of Command Ceremony

QUICK ISS Status – Environmental Control Group: