The International Space Station (ISS) has been a cornerstone of human space exploration since its inception, serving as a microgravity and space environment research laboratory. On December 12, 2013, the ISS was in the midst of its 38th expedition, known as Expedition 38, which began on November 7, 2013, and concluded on March 10, 2014. This period was marked by significant scientific research, maintenance activities, and international collaboration.

Expedition 38 Overview

Expedition 38 was a collaborative mission involving astronauts from NASA, Roscosmos, the European Space Agency (ESA), and the Japan Aerospace Exploration Agency (JAXA). The crew members during this expedition included:

  • NASA Astronauts: Michael S. Hopkins (Commander), Richard Mastracchio, and Koichi Wakata (Flight Engineer)
  • Roscosmos Cosmonauts: Oleg Kotov (Commander) and Sergey Ryazansky (Flight Engineer)
  • ESA Astronaut: Samantha Cristoforetti (Flight Engineer)

These astronauts were responsible for conducting a variety of scientific experiments, performing maintenance tasks, and ensuring the overall health and safety of the ISS during this period.

Scientific Research and Experiments

During Expedition 38, the crew engaged in numerous scientific studies across various disciplines, including human physiology, biology, physics, and Earth sciences. Notable experiments and activities included:

  • Space Headaches Experiment: This study aimed to determine the incidence and characteristics of headaches occurring among astronauts in orbit. Crew members completed weekly questionnaires to monitor and analyze headache occurrences and their potential impact on mission performance.
  • Neurospat Experiment: Focused on understanding the effects of microgravity on spatial orientation and cognitive functions, this experiment involved the use of electroencephalography (EEG) to monitor brain activity during specific tasks.
  • Reversible Figures Experiment: This experiment investigated how astronauts perceive ambiguous visual stimuli in microgravity, providing insights into the effects of spaceflight on visual perception and cognitive processing.

These experiments contributed valuable data to our understanding of human health and performance in space, informing future long-duration missions. ([esa.int](

Maintenance and Upgrades

Maintenance of the ISS is crucial to ensure its continuous operation and the safety of its crew. During Expedition 38, several significant maintenance activities were undertaken:

  • Cooling System Repair: A critical repair was performed on the ISS's cooling system, which is essential for regulating the station's temperature. The crew replaced a faulty ammonia pump module, restoring the system's functionality and preventing potential overheating of onboard equipment. This repair was completed on December 24, 2013, and was considered a success, eliminating the need for an additional spacewalk that had been planned to address the issue. ([theguardian.com](
  • External Camera Installation: The crew attempted to install two high-definition cameras on the exterior of the Zvezda module to enhance Earth observation capabilities. However, the installation was unsuccessful due to one of the cameras failing to provide data during testing. Despite this setback, the crew proceeded with the installation and jettisoned experimental equipment outside the Russian segment. This spacewalk, conducted on December 27, 2013, was the longest Russian EVA in history. ([en.wikipedia.org](

International Collaboration and Operations

The ISS serves as a testament to international cooperation in space exploration. During Expedition 38, the crew worked seamlessly across national lines, conducting joint experiments and sharing responsibilities. The European Space Agency (ESA) played a significant role in supporting the mission, providing scientific expertise and operational assistance. ESA's Columbus laboratory, attached to the ISS, facilitated various experiments and served as a hub for European research activities. ([esa.int](

Conclusion

On December 12, 2013, the International Space Station was a hub of scientific discovery, maintenance, and international collaboration. The efforts of the Expedition 38 crew ensured the station's continued operation and contributed valuable knowledge to the field of space exploration. Their work exemplified the spirit of cooperation and dedication that defines the ISS's mission to advance human understanding of space and its effects on the human body.

Sources

  • European Space Agency — ESA ISS Science & System - Operations Status Report #138 Increment 34: 26 January – 8 February 2013 —
  • European Space Agency — ESA ISS Science & System - Operations Status Report #139 Increment 34: 9 - 22 February 2013 —
  • European Space Agency — ESA ISS Science & System - Operations Status Report #141 Increment 34: 9 – 22 March 2013 —
  • European Space Agency — ESA ISS Science & System - Operations Status Report #159 Increment 38: 30 November 2013 – 3 January 2014 —
  • NASA — NASA FY 2013 Budget Estimates--with revised Astrophysics section (as of 6/13/12) —