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The National Aeronautics and Space Administration (NASA) Johnson Space Center (JSC) Advanced Extravehicular Activity (AEVA) Team, during the last two weeks of October 2008, led the field test portion of the 2008 Desert Research and Technology Studies (D-RATS) near Flagstaff, AZ. The D-RATS field test activity is the year-long culmination of the technology and operations development efforts of various individual science and advanced engineering discipline areas into a coordinated field test demonstration under representative (analog) planetary surface terrain conditions. The 2008 D-RATS, which was the eleventh RATS field test, was the most focused and successful test to date. It hosted participants from six NASA field centers, three research organizations, one university, and one other government agency.

During the first two weeks of September 2007, the National Aeronautics and Space Administration (NASA) Johnson Space Center (JSC) Advanced Extravehicular Activity (AEVA) team led the field test portion of the 2007 Desert Research and Technology Studies (D-RATS) in the Flagstaff, AZ area. The Desert RATS field test activity is the year-long culmination of various individual science and advanced engineering discipline areas’ technology and operations development efforts into a coordinated field test demonstration. The field test is conducted under representative (analog) planetary surface terrain conditions. The 2007 Desert RATS was the tenth RATS field test and was the most focused test to date with participants from seven NASA field centers, a variety of NASA support contractors, and one other government agency. The main test objective was to demonstrate two operational concepts for lunar outpost activities/assembly to inform future Constellation Architecture Team (CAT) studies.

During the first two weeks of September, 2006, the National Aeronautics and Space Administration (NASA) Johnson Space Center (JSC) Advanced Extra Vehicular Activity (AEVA) team led the field test portion of the 2006 Desert Research and Technology Studies (D-RATS) in the Flagstaff, AZ area. The Desert RATS field test activity is the year-long culmination of various individual science and advanced engineering discipline areas’ technology and operations development efforts into a coordinated field test demonstration under representative (analog) planetary surface terrain conditions. The 2006 Desert RATS was the ninth RATS field test and was the largest, most systems-oriented, integrated field test to date with participants from seven NASA field centers, three industry partners, and two research organizations. Each week of the test, RATS addressed specific sets of objectives. The first week of field testing focused on Lunar surface science and in-situ resource utilization tasks.

Procedures for rapid microbiological analysis were performed during simulated surface extra-vehicular activity (EVA) at Meteor Crater, Arizona. The fully suited operator swabbed rock (‘unknown’ sample), spacesuit glove (contamination control) and air (negative control). Each swab sample was analyzed for lipopolysaccharide (LPS) and β-1, 3-glucan within 10 minutes by the handheld LOCAD PTS instrument, scheduled for flight to ISS on space shuttle STS-116. This simulated a rapid and preliminary ‘life detection’ test (with contamination control) that a human could perform on Mars. Eight techniques were also evaluated for their ability to clean and remove LPS and β-1, 3-glucan from five surface materials of the EVA Mobility Unit (EMU). While chemical/mechanical techniques were effective at cleaning smooth surfaces (e.g. RTV silicon), they were less so with porous fabrics (e.g. TMG gauntlet).

With a renewed focus on manned exploration, NASA is beginning to prepare for the challenges that lie ahead. Future manned missions will require a symbiosis of human and robotic infrastructure. As a step towards understanding the roles of humans and robots in future planetary exploration, NASA headquarters funded ILC Dover and the University of Maryland to perform research in the area of human and robotic interfaces. The research focused on development and testing of communication components, robotic command and control interfaces, electronic displays, EVA navigation software and hardware, and EVA lighting. The funded research was a 12-month effort culminating in a field test with NASA personnel.

Since the early 1980’s, the Shuttle Extra Vehicular Activity (EVA) glove design has evolved to meet the challenge of space based tasks. These tasks have typically been satellite retrieval and repair or EVA based flight experiments. With the start of the International Space Station (ISS) assembly, the number of EVA based missions is increasing far beyond what has been required in the past; this has commonly been referred to as the “Wall of EVA’s”. To meet this challenge, it was determined that the evolution of the current glove design would not meet future mission objectives. Instead, a revolution in glove design was needed to create a high performance tool that would effectively increase crewmember mission efficiency. The results of this effort have led to the design, certification and implementation of the Phase VI EVA glove into the Shuttle flight program.

The success of astronauts performing Extra-Vehicular Activity (EVA) is highly dependent on the performance capabilities of their spacesuit gloves. Thermal protection of crewmember's hands has always been a critical concern but has recently become more important because of the increasing role of the crewmember in the manipulation of objects in the environment of space. The utilization of EVA for challenging missions, such as the Hubble Space Telescope (HST) repair and Space Station assembly missions, has prompted the need for improved glove thermal protection. The increased manipulation of hot and cold objects is necessary to complete these complex missions. Thermal protection of the spacesuit glove is accomplished by the Thermal and Micrometeoroid Garment (TMG). The TMG is a multilayered cover that fits over the restraint layer of the spacesuit glove. The TMG is engineered to provide thermal protection for crewmember's hands as well as for the glove bladder and restraint.

The success of astronauts performing extravehicular activity (EVA) on orbit is highly dependent upon the performance of their spacesuit gloves. A study has recently been conducted to advance the development and manufacture of spacesuit gloves. The process replaces the manual techniques of spacesuit glove manufacture by utilizing emerging technologies such as laser scanning, Computer Aided Design (CAD), computer generated two-dimensional patterns from three-dimensional surfaces, rapid prototyping technology, and laser cutting of materials, to manufacture the new gloves. Results of the program indicate that the baseline process will not increase the cost of the gloves as compared to existing styles, and in production, may reduce the cost of the gloves. Perhaps the most important outcome of the Laserscan process is that greater accuracy and design control can be realized.

Based on recently revised space debris environment estimations for Low Earth Orbit (LEO) altitudes, the level of Micrometeoroid/Debris (M/D) protection afforded by the current Shuttle space suit layup may not be sufficient for application to the Space Station Freedom Program. Enhanced M/D protection could be incorporated through the use of a flexible multi-hull Thermal Micrometeoroid Garment (TMG) based on advanced fabric material layups. A lightweight, flexible TMG design for enhanced space suit M/D protection would potentially consist of an outer layer or “shield” comprised of Orthofabric, multi-layers of aluminized Mylar and a layer of silicone rubber loaded with micron sized particles of tungsten. The second layer or “backup sheet” would be comprised of a layer(s) of a fabric material such as Spectra (UHMWPE). The shield layers would fragment and/or vaporize the M/D projectile while the backup sheet would stop the resultant debris cloud.