Japanese Experiment Module (JEM) Moderate Temperature Loop (MTL) Leak Update: Express Rack (ER)5 was isolated yesterday as part of the on-going search for the JEM MTL leak. While Space Station Integration and Promotion Center (SSIPC) continues to monitor total JEM MTL fluid volume, the slow low leak rate takes approximately 24 hours to manifest in telemetry and additional time is needed to verify the impacts of the isolation.

Fluid Shifts: With operator assistance, a 55S crewmember performed their Fluid Shifts Baseline Imaging Measurements activities today. Fluid Shifts is a NASA investigation, divided into Dilution Measurements, Baseline Imaging, and Baseline Imaging with Chibis (Lower Body Negative Pressure). The Fluid Shifts experiment investigates the causes for severe and lasting physical changes to astronaut’s eyes. Because the head ward fluid shift is a hypothesized contributor to these changes, reversing this fluid shift with a lower body negative pressure device is being evaluated as a possible intervention. Results from this study may help to develop preventative measures against lasting changes in vision and to prevention of eye damage.

Cold Atom Lab (CAL): Today the crew inspected and reseated multiple fiber optic connections in order to troubleshoot poor signal quality on two of the CAL signal paths. The CAL contains two different systems in the instrument, one system observes Rubidium and the other observes Potassium. The troubleshooting activity was conducted to correct a poor signal on the Potassium side, and these issues have not been resolved. However, the Rubidium side is functional and investigators have already used it to produce Bose-Einstein Condensates (BEC)s from atoms of rubidium. Ground teams are assessing a forward plan to correct the CAL signal path issues. 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.

Sextant Navigation: The crew calibrated the sextant and then performed a session for the Sextant Navigation investigation. This session will emphasize position stabilization and sighting. Following data collection, the crew will record the results and stow the equipment. The Sextant Navigation investigation focuses on stability and star sighting opportunities in microgravity. Astronauts onboard the ISS test a hand-held sextant that is intended for use on future Orion exploration missions. The results from this investigation can aid in the development of emergency navigation methods for future manned spacecraft. Historically, Gemini missions in 1965-66 were the first to exercise sextant sightings from a spacecraft. A sextant was built into Apollo vehicles as a navigation backup in case of lost communications.

European Space Agency (ESA) Education Payloads Operations (EPO): Earlier today, Gerst recorded a message to promote the Überflieger competition where students at German universities design and build their own ISS experiment.

Center for the Advancement of Science in Space (CASIS) Protein Crystal Growth (PCG) 13: To support CASIS PCG 13 activities next week, the crew continued to prepare the Space Automated Bio-product Laboratory (SABL) by configuring the microscope and camera before performing checkout activities. CASIS PCG 13 seeks to enhance the way crystals are grown in a microgravity environment by allowing crewmembers to observe imperfections within a crystal and make real-time adjustments to follow-up experiments, rather than returning a sample to Earth and relaunching to try again. This dramatically reduces the time it takes to conduct an experiment aboard the space station and creates a timely, realistic and more cost-effective solution for prospective researchers.

HTV Rack Relocation Prep: This week the crew will execute a series of activities in order to prepare ISS for the installation of new racks arriving on HTV-7. After relocating and consolidating stowage from rack fronts yesterday, today the crew removed remaining hardware in PMM1O4 and PMM1D4 RSRs, completed the JLP stowage removal, and reconfigured the Muscle Atrophy Resistive Exercise System (MARES) rack for stowage by removing the VIF brackets on the front of the rack and a rear stowage plate from the rack.

Mobile Servicing System (MSS) Operations: Overnight, robotics ground controllers used the Space Station Remote Manipulator System (SSRMS) and Special Purpose Dexterous Manipulator (SPDM) to unfasten five H1 (secondary) fixtures and break torque on three H2 (primary) fixtures across five Channel 2A Integrated Equipment Assembly (IEA) batteries. Due to time constraints, controllers were unable to break torque on two of the H2 bolts. Later tonight, controllers will complete the same task on the six robotically accessible Channel 4A IEA batteries. These operations will reduce the ExtraVehicular Activity (EVA) time needed to install the new Lithium Ion (Li-Ion) batteries launching on HTV-7 in September. The two remaining 2A H2 bolts will be removed during nominal robotics operations during the HTV-7 mission.

Today’s Planned Activities:

All activities are complete unless otherwise noted.



Microbial Tracking-2 Reminder for Saliva Collection

Cold Atom Lab Fiber Cable Cover Removal

SPHERES Rechargeable Battery Install

Setup and configuration of КСПЭ camcorder Sony PMW-200 (СМ1РО_3_319) in SM for mpeg2 TV coverage Space Medicine while performing МО-5.

Stow JLP and PMM Config

Acoustic Monitor Setup for Static Measurements

Fluid Shifts OCT Baseline Setup

SEPARATSIYA. Filling Centrifugal Multi-Purpose Vacuum Distiller (ЦМВД) with pre-treat fluid to maintain efficiency.

Fluid Shifts Ultrasound 2 HRF Rack 1 Power On

Fluid Shifts CDL Holter Arterial BP Hardware Don – Subject

Preventive Maintenance of DC1 Docking Assembly hatch sealing mechanisms and Progress 439 (DC1) hatch before RS EVA

Fluid Shifts Ultrasound Baseline Scan

Study of cardiovascular system under measured physical CYCLE Ergometer load.

Cold Atom Lab Station Support Computer Relocate Setup

Deactivation of camcorder, TV System monitoring equipment and closing applications.

Cold Atom Lab Fiber Troubleshooting

Assessment of Cardiovascular Function on Cycle Ergometer

Study of cardiovascular system under measured physical CYCLE Ergometer load.

Fluid Shifts CCFP Baseline Test

Fluid Shifts USOS Operations Historical Documentation Photography

Fluid Shifts OCT Baseline Exam

Fluid Shifts DPOAE Baseline Test – Subject

Fluid Shifts Tonometry Baseline Setup

Microscope Hardware Setup via SABL Power

Fluid Shifts Tonometry Baseline Exam

Fluid Shifts CDL Holter Arterial BP Hardware Doff – Subject

Fluid Shifts Tonometry Baseline Stow

Fluid Shifts OCT Baseline Stow

Ultrasound 2 HRF Rack 1 Stow Alternate

EPO crew message recording

Microscope SABL Camera Checkout

Fluid Shifts CCFP Baseline Stow

EVA Medical Kit Configuration

Preparation for pressurized Orlan suits transfer from DC1 to ПхО Training

Cold Atom Lab Station Support Computer Relocate Setup

Dry Run with Two Pressurized Orlan Suits Transfer to ПХО.

Regenerative Environmental Control and Life Support System (ECLSS) Recycle Tank Fill

MARES Stowage Configuration

Sextant Navigation Session 2 Operations

SPHERES Rechargeable Battery Charge and Stow

In Flight Maintenance (IFM) MARES Rack Reconfiguration

Configuring ПхО to initial state after pressurized Orlan suits transfer training.

Installation of US EMU Lights, Video Camera, and REBA on Orlan No.5 and Orlan-MKS No.4.

Stow PMM1D4 Remove

Install light and video camera ORLAN suits

Cold Atom Lab Fiber Cover Replace

Food Acceptability Questionnaire

Tropical Cyclone Untended Operations

SPHERES Rechargeable Battery Charge and Stow

Completed Task List Activities:

ESA PAO Downlink Message

Ground Activities:

All activities are complete unless otherwise noted.



Lab CDRA Activation

N3 CDRA to Standby

SPCH untie 3A/2A

SPCH tie 1A/4A

BGA 4A latch

MSS Operations: Channel 4A Battery Bolt break torque

Three-Day Look Ahead:

Thursday, 08/09: Rack Transfers, SPHERES TSLOSH Run, MagVector Umbilical Disconnect

Rack Transfers, SPHERES TSLOSH Run, MagVector Umbilical Disconnect Friday, 08/10: SPHERES Zero Robotics, ACME Controller R&R, ACE Sample Swap, Hatch Seal Inspection, Rodent Research 7 Ops, JSSOD Satellite Deploy

SPHERES Zero Robotics, ACME Controller R&R, ACE Sample Swap, Hatch Seal Inspection, Rodent Research 7 Ops, JSSOD Satellite Deploy Saturday, 08/11: Housekeeping, Off Duty, Ku-Bd Cable Swap, Glacier Ice Brick/Cold Block Insert, HRF Urine Collection Setup

QUICK ISS Status – Environmental Control Group: