NASA ISS On-Orbit Status 15 April 2015

Today: The Effect of Long-Term Microgravity Exposure on Cardiac Autonomic Function (Biological Rhythms): Kelly set up and donned a Holter Electrocardiogram (ECG).
He will record his ECG data for 48 hours, synching and downlinking the data between 21 and 24 hours after starting. Biological Rhythms studies the effects of long-term microgravity exposure on heart function by analyzing an astronaut’s electrocardiogram for 48 hours. While ISS keeps Greenwich Mean Time (GMT), it remains unknown whether a separate biological rhythm is imposed on long-term flight crews. To study this, astronauts wear an Actiwatch sleep monitor for 96 hours and a Holter electrocardiograph for 48 hours in the middle of that sequence.

Circadian Rhythms: Cristoforetti configured the Circadian Rhythm Armband Monitor and donned the Thermolab sensors and belt. She will wear the Circadian Rhythm monitors for 36 hours then doff and download the data on Friday. The objective of the Circadian Rhythm experiment is to obtain a better understanding of any alterations in circadian rhythms in humans during long-duration spaceflight. Such knowledge will provide important insights into the adaptations of the human autonomic nervous system in space over time, and has significant practical implications by helping to improve physical exercise, rest- and work shifts as well as fostering adequate workplace illumination in the sense of occupational healthcare in future space missions. The Circadian Rhythms will be measured by monitoring the bodies core temperature. During the first, mid and last session, the armband system will also be used.

Node 3 (N3) Forward Midbay Intermodule Ventilation (IMV) Reconfiguration: Following yesterday’s procedure review and hardware gather, Cristoferetti removed existing IMV hardware from N3 Forward Midby and installed new ducting and an IMV Manual Valve in preparation for the PMM relocate to N3 Forward.

Extravehicular Activity (EVA) Hard Upper Torso (HUT) Swap: Yesterday the crew moved Extravehicular Mobility Unit (EMU) 3011 from the Forward EMU Don/Doff Assembly (EDDA) to the Crewlock and EMU 3005 from the Crewlock to the Forward EDDA. Today Virts and Kelly swapped HUTs between EMU 3005 (size XL) and EMU 3010. This results in EMUs 3003 (size L) and 3010 (size XL) as primary EMUs with 3005 as backup. Following the HUT swap the crew performed a successful EMU checkout of both 3005 and 3010

Today’s Planned Activities
All activities were completed unless otherwise noted.

Inspection of ???-4, ???-7 fuses in MRM1 based on LED indication
BLR48 – Preparing for and starting measurements
Water Transfer to EDV from ??? 424 (DC1) Rodnik tanks r/g 8530
Replacement of air filter in ???
CASKAD. Manual Mixing in Bioreactor / r/g 8358
Replacement of urine receptacle (??) and filter-insert (?-?) in ???
Verification of ??-1 Flow Sensor Position
???424 (DC1) Stowage and IMS Ops / r/g 8410, 8523
Node1 Stowage
Checking ??? connections to XP 704 and XP 711 r/g 8528
DATA TRANSMISSION RADIO LINK (????) r/g 8508
VIZIR. Experiment Ops / r/g 8527
Cleaning FGB Gas-Liquid Heat Exchanger (???) Detachable Screens 1, 2, 3
Node 3 – IMV Reconfiguration
MDCA – Preparation steps
URAGAN. Observations and Photography / r/g 8519
NAPOR-miniRSA. Cleaning ???-? vents / r/g 8518
???424 (DC1) Stowage and IMS Ops / r/g 8410, 8523
EMU – Hard Upper Torso (HUT) Swap
Isolation of LED metallic surface on ?? 716 ???? front panel / r/g 8525
TV Conference with Samara Region Representatives r/g 8529
DATA TRANSMISSION RADIO LINKr/g 8508
Node 3 – IMV Reconfiguration
IMS Delta File Prep
EMU checkout
EMU water dump, fill [Deferred]
??? 424 (DC1) Rodnik Tank 1 and 2 shell compression / r/g 8530
Measurements No.1 & 2 to Identify the Root Cause of unusual noise during SM SA ops r/g 8505, 8515
CASKAD. Manual Mixing in Bioreactor / r/g 8358
Thermolab – Instrumentation Ops for Circadian Rhythms
VIRU. Battery Charge (start) / r/g 6827
Self-Reaction Test Reaction Time Test (evening)
Completed Task List Items

Wearable Monitoring Vest part 2
Ground Activities
All activities were completed unless otherwise noted.

UHF2 powerup and down.
Three-Day Look Ahead:
Thursday, 04/16: OBT Dragon RoBOT session 2/attached phase ops review, CBCS install/checkout, SSK and MAS samples, N3 IMV restow
Friday, 04/17: Dragon capture/berthing
Saturday, 04/18: Dragon ingress, begin cargo transfer
QUICK ISS Status – Environmental Control Group:

Component – Status
Elektron – Off
Vozdukh – Manual
[???] 1 – SM Air Conditioner System (“SKV1”) – On
[???] 2 – SM Air Conditioner System (“SKV2”) – Off
Carbon Dioxide Removal Assembly (CDRA) Lab – Operate
Carbon Dioxide Removal Assembly (CDRA) Node 3 – Operate
Major Constituent Analyzer (MCA) Lab – Shutdown
Major Constituent Analyzer (MCA) Node 3 – Operate
Oxygen Generation Assembly (OGA) – Process
Urine Processing Assembly (UPA) – Standby
Trace Contaminant Control System (TCCS) Lab – Off
Trace Contaminant Control System (TCCS) Node 3 – Full Up