Payloads:
Actiwatch-Plus: Actiwatch devices were attached to the HRF-1 rack for data downlink and charging. The Actiwatch-Plus is a waterproof, non-intrusive, sleep-wake activity monitor worn on the wrist of a crewmember and contains a miniature uniaxial accelerometer that produces a signal as the subject moves. The data is stored in non-volatile memory within the Actiwatch until they are downloaded for analysis.
Advanced Nano Step: The Nano Step Cartridge with Nano Step Specimen Cell-5 and Nano Step Circuit Box was installed into the Solution Crystallization Observation Facility (SCOF). The Effects of Impurities on Perfection of Protein Crystals, Partition Functions, and Growth Mechanisms (Advanced Nano Step) experiment monitors and records how the incorporation of specific impurity molecules affect the development and quality of protein crystals, as they grow in a quartz cell aboard the ISS. The crystals grown on the ISS are returned to Earth and characterized using synchrotron X-ray diffraction. The protein crystal and impurity interactions are managed and monitored jointly by both scientists on the ground and the ISS crew.
Confocal Space Microscopy: The two checkout samples were removed from the Thermal Container on the Microscope and the Temp Logger was installed. The Confocal Space Microscope (Confocal Microscope) is a JAXA facility that provides fluorescence images of biological samples aboard the ISS. Confocal microscopy uses spatial filtering techniques to eliminate out-of-focus light or glare in specimens with thicknesses exceeding the immediate plane of focus. With the Confocal Microscope, data can be obtained on the fundamental nature of cellular and tissue structure and functions in real-time.
Human Research Facility-1 (HRF-1): An inventory of the HRF Supply Kit Purple, the HRF Supply Kit Green, and the Urine Collection Kits via Stow Track was performed. HRF-1 provides an on-orbit laboratory that enables scientists conducting human life science research to evaluate the physiological, behavioral, and chemical changes induced by space flight. Research performed using HRF-1 provides data to help scientists understand how the human body adapts to long-duration spaceflight.
Immunity Assay: Four Immunity Assay Reaction Tube Ziplock Bags, stowed into ICEBERG-2, were audited. Immunity Assay targets to investigate the impact of space-flight stressors on cellular immune functions ex vivo using a new in vitro Delayed Type Hypersensitivity assay set-up.
RadMap Telescope: The RadMap Telescope was installed in preparation for future operations. Understanding and overcoming the human risks from space radiation is one of the major challenges facing future space exploration. The Validating New Radiation-Sensing Technologies (RadMap Telescope) demonstrates new radiation-sensing technologies for applications in autonomous and crewed spacecraft. These technologies, which have just become sufficiently mature for large-scale applications, enable compact yet highly capable radiation monitors so future spacecraft can benefit from increased measurement capabilities with fewer sensors.
Snowcone Cloud Edge Compute Demonstration (Snowcone): The Ethernet Cable at the Integrated Station LAN (ISL) Interface Panel was disconnected following the conclusion of Snowcone operations. Snowcone demonstrates technology to screen astronaut images and identify those that may contain sensitive information not for public release. The technology includes reduction of large-scale data and processing of data near the source, known as edge computing, which are capabilities integral to future space exploration.
Veg-05: The Veggie facility was cleaned after operations and set up for dry out. The Pick-and-Eat Salad-Crop Productivity, Nutritional Value, and Acceptability to Supplement the ISS Food System (Veg-05) investigation is the next step in efforts to address the need for a continuous fresh-food production system in space.
Systems:
Extravehicular Activity (EVA) Tool Configuring: The crew retrieved and configured tools for the upcoming Radio Frequency Group (RFG) Retrieval EVA. This included hardware for the Articulating Portable Foot Restraint (APFR), Modular Mini Work Stations (MWSs), tethers, restraints, translation aids, and hand held tools. Additionally, the crew photographed final tool configuration buildups for the ground to review. The APFR is a very commonly used tool to restrain an EV crew member’s feet at a work site. The MWS is a hard-structure, mechanical device which mounts on the front of the Hard Upper Torso (HUT) on the EMU for tool stowage, restraint, and transport.
Temperature and Humidity Control (THC) Oxygen Generator System (OGS) Operations: The crew removed the Velcro from the OGS rack panel and adapter and installed new ones. Next, the crew used the Velocicalc device and a set of measurement aids to measure the air flow for the Oxygen Generation Assembly (OGA) Avionics Air Assembly (AAA) inlet. This activity supports monitoring of the health of the ISS InterModule Ventilation (IMV) system. The OGA is part of the Regen Environmental Control and Life Support System (ECLSS) System and produces oxygen via electrolysis using iodinated water from the Water Processor Assembly (WPA).
EVA Helmet Light Installation and Rechargeable EVA Battery Assembly (REBA) Powered Hardware Checkout: The crew installed the Helmet Light Restraint Straps on to the Helmet Light gimbals. Next, the crew installed the Helmet Light Bracket to the Helmet. The crew then installed the Extravehicular Mobility Unit (EMU) TV and EVA Helmet Interchangeable Portable (EHIP) Power Adapters. Finally, the crew performed a REBA Powered Hardware Checkout for the glove heaters and EMU TV. These activities were all performed in preparation for the upcoming RFG Retrieval EVA on April 28th.
Completed Task List Activities:
- None
Today’s Ground Activities:
All activities are complete unless otherwise noted.
- HRF Rack 1 Rack Commanding
- Crew Dragon System Checkout
- ARS Node 3 MCA Zero Calibration
- WSC SCP-8 CY21Q4-2 RHEL8 Step-up
- EMU Data Recorder Operations
Look Ahead Plan
Thursday, April 27 (GMT 117)
Payloads:
- Veg-05 Deactivation
Systems:
- EVA Procedure Review and Conference
- EVA Tool Configuring and Audit
- Equipment Lock Preparation
- ROBO Procedure Review and Conference
Friday, April 28 (GMT 118)
Payloads:
- Crew Off Duty
Systems:
- USOS RFG Retrieval EVA
Saturday, April 29 (GMT 119)
Payloads:
- Crew Off Duty
Systems:
- EVA Debrief Conference
- EMU Water Recharge
- EVA Glove Photos
- Photo/TV EVA Camera Disassembly
- EVA Battery Initiation
Today’s Planned Activities:
All activities are complete unless otherwise noted.
- Countermeasures System (CMS) Advanced Resistive Exercise Device (ARED) Quarterly Inspection and Tension Adjustment
- Actiwatch Plus HRF Rack 1 Setup, Swap, and Stow
- Glove Box Closeout
- EVA Tool Configuring
- Advanced Nano Step Cartridge and Cell5 Installation and Temp Logger Data Save
- Health Maintenance System (HMS) Periodic Health Status (PHS) Pre EVA Examination Setup, Exam, and Stow
- Waste and Hygiene Compartment (WHC) Manual Fill Initiate/Terminate
- Immunity Assay Audit Activity and Description Reading
- OGS Velocicalc Adapter Velcro Install
- THC OGS AAA Flow Measurement
- Photo/TV (P/TV) Battery Charge Deactivation
- IPU2 Video Cable Disconnection
- Confocal Space Microscopy Temp Logger Setup
- Portable Onboard Computers (POC) Dynamic Onboard Ubiquitous Graphics (DOUG) Setup
- EVA Depress Procedure and Cuff Checklist Printing
- In Flight Maintenance (IFM) RFG Bag Gather
- Russian EVA Tool Transfer
- Station Support Computer (SSC) Surface Pro 5 (SP5) Deploy
- Food Physiology Crew Diet Briefing
- Urine Transfer System Backup and Offload EDV Swap
- Onboard Training (OBT) Robotics On-board Trainer (ROBoT) Setup and T&C Self Study
- Environmental Health System (EHS) Total Organic Carbon Analyzer (TOCA) Calibration Check, Data Record, and Waste Water Bag (WWB) Change Out
- Express Failed Light Bulb Replacement
- WORF Laptop Reset
- RADMAP Hardware Gather and Install
- EHS – Formaldehyde Monitoring Kit (FMK) Deployment Operations
- [Deferred] EHS – Grab Sample Container (GSC) Sampling Operations
- US EVA Helmet Light Installation
- Snowcone Cable Disconnect
- VEG-05 Clean and Dry
- HRF Facility Inventory Stowage Track
- P/TV EVA Camera Configuration
- Contingency Water Container – Iodinated (CWC-I) Degas
- REBA Powered Hardware Checkout