Fluid Shifts Baseline Imaging: The 49S and 50S crewmembers continued this week’s Fluid Shifts baseline imagery activities. With one crew member performing as an operator, ultrasound imaging was taken of arterial and venous measures at various body locations. Additional data from the Cerebral and Cochlear Fluid Pressure (CCFP), Optical Coherence Tomography (OCT), a Distortion Product Otoacoustic Emission (DPOAE) test, ESA’s Cardiolab (CDL) Holter Arterial Blood Pressure Device, and Intraocular Pressure (IOP) was collected as well. Fluid Shifts is a joint NASA-Russian experiment that investigates the causes for severe and lasting physical changes to astronaut’s eyes. Because the headward fluid shift is a hypothesized contributor to these changes, reversing this fluid shift with a lower body negative pressure device is investigated as a possible intervention. Results from this study may help to develop preventative measures against lasting changes in vision and eye damage.

Everywear Investigation: A 49S crew member completed a sleep questionnaire as part of his Flight Day (FD)140 sleep assessment session. The crew also removed a biometric patch they were wearing and transferred the data from it. Everywear makes use of wearable sensors connected to a iPad tablet computer which is wirelessly synchronized with computers on the ground. This system seeks to demonstrate the benefits of extensive physiology data collection for both science and medical followup purposes.

Extravehicular Activity (EVA) Preparations: The crew utilized Dynamic Onboard Ubiquitous Graphics (DOUG) Software to review the translation paths during the EXPRESS Pallet Controller Assembly (ExPCA) EVA currently scheduled for May 12.

ISS Reboost: Early this morning the ISS completed a reboost using the Service Module main engines. The reboost was to set up planned conditions for 49S landing on June 2 and 67P launch on June 14. Burn duration was 30 seconds.

Cygnus Cargo Operations: The crew has completed ~25.5 hours of cargo transfer. Approximately 12 hours of transfer time remains.

Cycle Ergometer with Vibration Isolation and Stabilization (CEVIS) Status: The crew replaced the CEVIS Ergometer as a result of the crew reporting a grinding noise. Ground teams reviewed video and audio and isolated the noise to a stepper motor in the CEVIS Ergometer. The crew will exercise on the CEVIS to veriify functionality and absence of noise.

Mobile Servicing System (MSS) Operations: Yesterday evening, Robotics Ground Controllers walked the Space Station Robotic Manipulator System (SSRMS) from Node 2 to Mobile Base System (MBS) Power Data Grapple Fixture 1 (PDGF1). They then maneuvered the SSRMS to unstow the Special Purpose Dexterous Manipulator (SPDM) from MBS PDGF2 and completed the Mobile Servicing System (MSS) setup for the Remote Power Control Module (RPCM) S11A-C swap with RPCM S14B-G scheduled for tomorrow, April 28th.

Today’s Planned Activities

All activities were completed unless otherwise noted.

Fast Neutron Spectrometer Troubleshoot

IPAD ODF updates

EKON-M. Observations and photography

Measuring Hematocrit Number.

Hematocrit Test

Measuring Hematocrit Number.

Soyuz 733 Automatic Phased Array Antenna (АФАР-M ) Power Bus Off/On

Fluid Shifts Ultrasound 2 HRF Rack 1 Power On

Hematocrit Equipment stowage

Health Maintenance System (HMS) Ultrasound 2 Scan

Recharging Soyuz 733 Samsung PC Battery (if charge level is below 80%)

ISS Crew Orientation

EveryWear sleep assessment questionnaire filling

Fluid Shifts OCT Baseline Setup

MERLIN 5 Desiccant Swap

Photo/TV 4K Teardown

ISS HAM Service Module Pass

Fluid Shifts CDL Holter Arterial BP Hardware Don – Subject

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

EveryWear Doffing of Biometric Patch and data transfer

CONSTANTA-2. Cassette Retrieval from ТБУ-В and Setup on a panel for a 1-hour warmup

Fluid Shifts Ultrasound Baseline Scan

Study of cardiovascular system under graded physical CYCLE load

ESA Weekly crew conference

CEVIS Ergometer R&R

CONSTANTA-2. Preparation and Execution 2

UDOD. Experiment Ops with DYKNANIYE-1 and SPRUT-2 Sets

Fluid Shifts CCFP Baseline Test – Subject

Recharging Soyuz 735 Samsung PC Battery (if charge level is below 80%)

EveryWear Biometric Patch close out activity

Fluid Shifts OCT Baseline Exam

Fluid Shifts DPOAE Baseline Test

Fluid Shifts OCT Baseline Stow

Fluid Shifts Tonometry Baseline Setup

Meteor Shutter Open

Fluid Shifts Tonometry Baseline Exam

Montreal PAO Event iPad Configuration

Fluid Shifts CDL Holter Arterial BP Hardware Doff – Subject

Portable Onboard Computers (POC) Dynamic Onboard Ubiquitous Graphics (DOUG) Software Review

CASKAD. Manual Mixing in Bioreactor

Fluid Shifts CCFP Baseline Stow

Fluid Shifts Tonometry Baseline Stow

Environmental Health System (EHS) Total Organic Carbon Analyzer (TOCA) Sample Data Record

Health Maintenance System (HMS) Ultrasound 2 Scan

Polar Desiccant Pack Swap

Terminate Soyuz 735 Samsung PC Battery Charge (as necessary)

Data Transmission Radio Link (RSPI) Clearing files from Onboard Memory Storage (БЗУ)

ISS Crew Orientation

Health Maintenance System (HMS) Ultrasound 2 Data Export

Handover of Increment 51 Crew

Activation check of Atmosphere Purification Filter Assembly A-2

Health Maintenance System (HMS) Ultrasound 2 Post Exam

Inventory Management System (IMS) Conference

Terminate Soyuz 733 Samsung PC Battery Charge (as necessary)

Evening Preparation Work

Health Maintenance System (HMS) Fundoscope Prep

Environmental Health System (EHS) – Coliform Water Sample Analysis 44 +/- 4 hours post processing

Health Maintenance System (HMS) Fundoscope Setup

Regenerative Environmental Control and Life Support System (RGN) Wastewater Storage Tank Assembly (WSTA) Fill

Health Maintenance System (HMS) CMO – Fundoscope

Health Maintenance System (HMS) Eye Exam – Fundoscope

Health Maintenance System (HMS) Fundoscope Tear Down and Stow

Completed Task List Items

None

Ground Activities

All activities were completed unless otherwise noted.

Fluid Shifts Support

Three-Day Look Ahead:

Friday, 04/28: EVA procedures review, BEAM ingress, Genes In Space hardware checkout, EHS RAM deploy

Saturday, 04/29: Crew off duty, housekeeping

Sunday, 04/30: Crew off duty

QUICK ISS Status – Environmental Control Group: