New Status: This afternoon the crew noticed white flakes floating outside on the port side of the vehicle. At the same time ground teams noticed a drop in the 2B Photovoltaic Thermal Control System (PVTCS) ammonia pressure, indicating an external ammonia leak. The 2B PVTCS has had a known slow leak for several months, but …
New Status: Node 3 Carbon Dioxide Removal Assembly (CDRA) Air Selector Valve (ASV) 102 Remove & Replace (R&R): On April 25 the Node 3 CDRA valve 102 failed to reach its commanded position. Over the following 24 hours the CDRA shut down 6 more times due to valve 102 not reaching position. Engineering teams reviewed the …
New Status: Robonaut Taskboard/Teleops: Following yesterday’s procedures review and camcorder setup, today Cassidy and Marshburn retrieved Robonaut and supporting hardware, installed Robonaut to a seat track and connected the cables for powered/commanded operations. Today and tomorrow will be the 3rd 2-day session of these activities. The Robonaut Tele-operation System is used to demonstrate the ability to …
New Status: Spinal: Hadfield and Marshburn conducted their 3rd and final session of this experiment with Cassidy as operator and remote guidance from ground teams. Spinal Ultrasound uses ground and space-based studies to characterize spinal changes during and after spaceflight. Ground based pre- and post-flight Magnetic Resonance Imaging (MRI) and high fidelity ultrasound, combined with in-flight …
New Status: improved Payload Ethernet Hub Gateway (iPEHG)-1 and -2 Installation: Commander (CDR) Hadfield upgraded PEHG-2 Wednesday and PEHG-1 today by removing the legacy PEHGs and installing two new iPEHGs. The new iPEHGs have enhanced configuration capabilities over the legacy PEHG, improved Gateway modes of operation and improved network protocols to support integration into Joint Station …
New Status: Burning and Suppression of Solids (BASS) Experiment (BASS): Cassidy conducted the 7th of 13 sessions planned for this experiment. BASS examines the burning and extinction characteristics of a wide variety of fuel samples in microgravity and will guide strategies for extinguishing fires in microgravity. BASS results contribute to the combustion computational models used …
New Status: In-Flight Maintenance (IFM) improved Payload Ethernet Hub Gateway (iPEHG) Installation: Commander (CDR) Hadfield upgraded PEHG-2 (in LAB1D2) by removing the legacy PEHG and installing the new iPEHG. IPEGH-1 installation is scheduled for this Friday, May 3. The new iPEHG will have enhanced configuration capabilities over the existing PEHG, improved Gateway modes of operation and …
New Status: Mobile Servicing System (MSS) Operations: Today Robotics Ground Controllers powered up the Mobile Servicing System (MSS) and translated the Mobile Transporter (MT) from Worksite (WS) 4 to WS2. They then maneuvered the Space Station Remote Manipulator System (SSRMS) into position, grappled the Special Purpose Dexterous Manipulator System (SPDM), and released it from Mobile Base …
New Status: 51 Progress (P) Reboost – Yesterday the International Space Station (ISS) performed a nominal 1.53 meters per second reboost using 51P thrusters. This reboost provided phasing for the upcoming 33 Soyuz landing and 35 Soyuz launch. Nutrition and Pro-K Experiment Sample Collections: Cassidy collected blood and urine samples and stowed them in the Minus Eighty …
51 Progress (51P) Docking: 51P successfully docked to the ISS Russian Segment Service Module (SM) aft port with this morning with contact and capture occurring at 7:26 am CDT. All Progress systems operated nominally with the exception of Kurs АСФ2 antenna which had still not deployed. A software patch was uplinked to the 51P vehicle which …
