Bone Densitometer (BD): The crew completed on-board Training for upcoming operations. Approximately the size of a consumer microwave oven, the Bone Densitometer uses X-rays to measure the bone mineral density (and the lean and fat tissue) of mice living aboard the ISS. As a result, researchers hope to develop medical technology that will combat bone density loss in space and on Earth, helping millions of senior citizens who suffer from osteoporosis.

Biomolecule Extraction and Sequencing Technology (BEST): The crew transferred three Cell kits into cold stowage for Dragon return. The BEST investigation studies the use of sequencing for identification of unknown microbial organisms living on the ISS, and how humans, plants and microbes adapt to living on the ISS.

The ISS Experience: The crew completed an Astronaut Log and recorded a portion of the Confined Combustion operations. The ISS Experience creates a virtual reality film documenting daily life aboard the ISS. The 8 to 10 minute videos created from footage taken during the six-month investigation cover different aspects of crew life, execution of science aboard the station, and the international partnerships involved. The ISS Experience uses a Z-CAM V1 Pro Cinematic Virtual Reality (VR) 360-degree camera with nine 190° fisheye lenses.

Confined Combustion: The crew performed Acrylic and Fabric sample ignitions with the black baffles installed in the system. This project aims to study flame spread in confined spaces—specifically the interactions between spreading flames and surrounding walls. Flame spread in confined spaces (such as buildings and vehicles) may pose a more serious fire hazard than flame spread in open spaces because of acceleration caused by radiative heat feedback from the surrounding walls and a tunnel flow acceleration effect. However, several aspects of flame spread are difficult to study in normal gravity conditions. Gravity-driven buoyancy flow complicates the fire growth process and prohibits a fundamental understanding of the underlying physics. However, in microgravity, buoyancy is eliminated, allowing scientists to better study the physics of flame spread.

SoundSee Mission: The crew completed unpack and inspection of the SoundSee hardware. Investigation of Deep Audio Analytics on the International Space Station (SoundSee Mission) tests monitoring of the acoustic environment using an audio sensor on Astrobee, a mobile robotic platform aboard the space station. Microphones collect acoustic information, and the Astrobee determines the sensor’s position. The system can detect anomalies in the sound of components inside a machine, providing autonomous monitoring of the health of infrastructure such as life support and exercise equipment.

Fluid Science Laboratory (FSL): The crew locked and released the Core Element inside the FSL rack in support of Multi-Boiling operations. The Fluid Science Laboratory (FSL) is a multiuser facility designed by the European Space Agency (ESA) for conducting fluid physics research in microgravity. It can be operated as a fully automatic or semiautomatic facility and can be controlled onboard by the International Space Station (ISS) crew or from the ground in telescience mode.

Global Ecosystem Dynamics Investigation (GEDI): The crew took still photos of the GEDI hardware from the JEM window. The Global Ecosystem Dynamics Investigation (GEDI) provides high-quality laser ranging observations of the Earth’s forests and topography required to advance the understanding of important carbon and water cycling processes, biodiversity, and habitat.

Systems:

Lab Port 6 (LAB1P6) Common Cabin Air Assembly (CCAA) Component Stow: Today, the crew secured the degraded LAB1P6 CCAA Heat Exchanger to the Flight Support Equipment (FSE) for return. This CCAA was replaced last week, and is the primarycomponent responsible for the control of temperature and humidity in the USOS segment and consists of a fan, a condensing heat exchanger, an air/water separator, temperature and liquid sensors, and electrical controlling hardware.

SpX-19 Cargo Operations: In preparation for the SpX-19 unberth and return to the ground, the ISS crew took the opportunity to work on Cargo transfer operations. The ISS crew, working off a Cargo Transfer list, packed and transferred a variety cargo items on the Dragon vehicle. SpX-19 is scheduled to depart ISS on Monday, January 6.

Completed Task List Activities:

Acoustics Audio Wanted Poster (found and stowed)

Taping Fluidics Tank 5

Ground Activities:

All activities are complete unless otherwise noted.



SPS Power Down/Up for OPM

PPS Array Operations for OPM

ACS H/O for OPM

SDMS Data Downlink

Tuesday, 12/31 (GMT 365)

Payloads:



NUTRISS ON and log (ESA)

RADI-N detectors deploy (8) Cupola Deploy (CSA)

Standard Measures Post Sleep (NASA)

CBEF-L Reconfiguration from config G to F (Large centrifuge) for Mouse ops (JAXA)

Confined Combustion Ops (NASA)

ISS Experience SLAMMD Bag Install (NASA)

Bone Densitometer Calibration (NASA)

Thermal Amine blower fan Header Scrubber Install (NASA)

SLAMMD Review (NASA)

Systems:

Thermal Amine Scrubber Blower Installation

Dragon Cargo Transfer

Dragon Release OBT

Wednesday, 1/1 (GMT 001) – Off Duty Day

Payloads:



NUTRISS ON and log (ESA)

Systems:

Crew Off Duty

Thursday, 1/2 (GMT 002)

Payloads:



NUTRISS ON and log (ESA)

TangoLab-2 Card 07 removal and telemetry check (NASA)

BioFabricator Media replace (NASA)

Food Acceptability (NASA)

Bone Dosimeter QC check (NASA)

CIR Manifold-4 H2 and CH4 Bottle Replace (Joint)

ISS Experience H/W Stow (NASA)

HERA H/W stow (NASA)

Rodent Bone Densitometer Scans (NASA)

ADSEP Historical Photo (NASA)

Systems:

WHC Urine Receptacle and Insert Filter R&R

Dragon Cargo Transfer

Today’s Planned Activities:

All activities are complete unless otherwise noted.