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Workshop SummaryASTROBIOLOGY
ADVANCED MEASUREMENT SYSTEMS WORKSHOP
Goal: The goal of the Advanced Measurement Systems Workshop was to characterize the current and near-term projected state of measurement system technologies needed for Astrobiology research on terrestrial and space missions. Background: Astrobiology, the study of the living universe, requires the input from a variety of space missions and terrestrial field studies in order to answer fundamental questions about life: • How do habitable worlds form and how do they evolve? • How did living systems emerge? • How can other biospheres be recognized? • How have the Earth and its biosphere influenced each other over time? • How do rapid changes in the environment affect emergent ecosystem properties? • What is the potential for survival and biological evolution beyond the planet of origin? Taking advantage of the wide range of mission opportunities identified for Astrobiology requires unusual technologies (see Piggyback Missions for Astrobiology Workshop results). Because of limitations in spacecraft accommodations, scientific instruments must be very small, very robust, and have low power and bandwidth requirements. They may need to operate autonomously, allow teleoperation, or conduct complex sample analyses in situ. The instruments will have to operate in environments characterized by extremes of heat and cold, vacuum, long dormant periods in transit to other worlds, varying gravity, survive high-g impacts, vibration, or high radiation -- in some cases, all of the above. Summary: Major targets of Astrobiology interest include Mars, Europa, Titan, comets, Space Station and Earth. There are a number of missions to high priority astrobiology sites planned over the next decade. The instruments needed for astrobiology can be developed. Thousands of sensors ranging from fingernail size to matchbook size exist along with a wide array of miniaturized chemical laboratories that can fit on a compact disk, and a host of other analytical and imaging instruments that can fit within soda can volumes. However, relatively few are ready for flight. The state of the art of sample management -- sample acquisition, preparation, distribution, and preservation -- is seriously deficient and precludes the use of the vast array of capabilities available in miniaturized analytical instrumentation. This problem is shared by DARPA and the biotech industries as well as NASA and may provide the basis for collaborative development. Some astrobiology instruments have applications to several environments within a planet as well as several different planetary bodies. These should be identified, prioritized, and a selected few developed to a flight ready status and duplicated for multiple use. Such an approach would enable fast response to piggyback opportunities and would free up development funds for new products. All life that we know exists in ecologies. Measurements tracing a biotic or prebiotic signature are only meaningful within the context of other environmental characteristics. Consequently, future astrobiology space research should push towards the development of complementary suites of instruments. Embracing miniaturization will support this approach. Because of the importance and controversial nature of any definitive statements regarding extraterrestrial life, it is recommended that NASA adopt some of the philosophies and approaches used in forensics science. "Astroforensics" was introduced during this workshop to deal with issues of evidence management in astrobiology. Specific approaches to design, development and testing were suggested to ensure that the evidence collected during astrobiology missions is not contaminated or otherwise compromised by the methods of detection, collection, transportation, analysis, storage, or subsequent re-testing. Because of the capabilities in the state of the art and the benefits that miniaturization brings to optimizing science return and enabling definitive answers to Astrobiology questions, it is recommended that NASA adopt increasingly higher technology standards for peer review and selection of flight instruments in the future. In conclusion, the current and projected state of the art can provide an impressive arsenal of tools for astrobiology research on the remarkable set mission opportunities planned over the next decade. Executed correctly, these tools and techniques can help characterize the organic history and composition of other worlds, find sources of deeply buried liquid water, enable sophisticated searches for extant and extinct life in extreme environments throughout the solar system, and document the evolution of terrestrial life beyond Earth. Joint development and collaborations with industry, NSF, NIH, NOAA, DOE, DARPA as well as universities can provide cost effective solutions to common problems, reduce the development cost of new technologies and -- as was evidenced in all the multidisciplinary astrobiology forums -- provide fresh perspectives and practical synergistic solutions to complex problems. TARGETS OF INTEREST
• Technologies need to be developed for astrobiology research on the following targets of astrobiology interest: Mars, Europa, Titan, comets, Space Station, Earth Mars -- is the most Earth-like of any planetary body in the solar system and may be the site of past, present and/or future life. Astrobiology questions about Mars relate to the search for water (past or present), protected subsurface voids (caves) that may preserve life or fossils, its chemical evolution history, evidence of extant or extinct life, climate history, the cause of Mars' profound environmental change between 4.5 and 2 billion years ago, the relationship of impacts and climate or life (if any), and resource mapping for future human occupation. Related Links: Center for Mars Exploration and Mars Missions, Year 2000 and Beyond! Europa -- may contain liquid water, even a liquid ocean below its icy crust. Astrobiology goals for Europa are to determine if there is a liquid ocean beneath its surface, characterize its organic history, and if there is liquid water present, conduct a thorough search for extant -- or extinct -- life. Related link: Europa, a Continuing Story of Discovery Titan -- is the only moon with a thick atmosphere, composed primarily of nitrogen, just like Earth's. Titan may have a surface ocean made of methane and an exotic sophisticated prebiotic organic chemistry. Understanding this cold chemistry and what it implies for the origin of life is of strong interest to astrobiology. Related link: Titan Biologic Explorer Comets -- are one of the most enigmatic and potent forces in planetary and biological evolution and a primary target for Astrobiology study. Comets capture and preserve the initial conditions of the formation of the solar system, are responsible for delivering most of the water and life giving organics to planets, may have a mature prebiotic chemistry on the pathway to the origin of life, and are responsible for profoundly altering planetary environments and driving some forms of life to extinction. They have even played roles from time to time in human cultural evolution. Related link: Comet Introduction Space Station -- provides a diverse platform for astrobiology research including gas/grain simulation studies to determine possibilities and constraints of interstellar and comet chemistry, intact cosmic dust collection for organic analyses, probabilities and limits of panspermia, evolutionary biology, ecosystem studies. Related links: Space Station
• Earth Astrobiology -- Investigations of Earth provide high quality science return in their own right as well as analog environments for understanding life on other worlds and testbeds for technologies and mission concepts. Related links: Earth (Arizona) Antarctica and the Arctic for Mars and Europa (Lake Vostok, Lake Hoare, ice shelf), Connections to Mars and Clues to Life on Europa. Hydrothermal vents and Cold Seep Communities for Mars and Europa analogs as well as origin of life. Ocean Planet and Cold Seeps in Monterey Bay. Leonid Meteor Storm -- The Leonid airborne mission deals with the accretion of extraterrestrial materials and the production of molecules and debris particles by interaction of that matter with our atmosphere. These topics are relevant to understanding the role of comets in the origin of life as well as contemporary extraterrestrial/terrestrial atmospheric chemistry; Leonid Meteor Outburst Mission Subterranean environments and caves provide important analog environments for understanding life on Mars as well as earth, including ecology, climate history, novel life forms, and assisting in the search for extraterrestrial life. Life Underground and Alliance for Aerobiology Research (AFAR) Governing Board Meeting Missions to stratosphere are of interest for understanding the extremes of biology, extraterrestrial/terrestrial atmospheric chemistry, and evaluating natural mechanisms by which terrestrial life may be deposited into interplanetary space. AIMS and SCOPE Terrestrial Impact Sites. Comet impacts caused global mass extinctions. Their relation to biological evolution on this and other worlds is of particular interest to astrobiology. New techniques are needed for investigation of the KT event and to determine whether other geologically-recorded mass extinctions were caused by impacts. Determine how early heavy bombardment influenced (possibly repeated) origins of life and its evolution. Terrestrial Impact Craters TECHNOLOGIES: KEY FINDINGS • Thousands of sensors ranging from fingernail size to matchbook size exist that can support a wide range of measurements including pH, chemical composition and concentration, temperature, pressure, partial pressure, gravity, acceleration, elemental abundances, spectral characteristics, etc. Most have been developed for other applications, so they need to be tailored and adapted for Astrobiology. We must start now to enable utilization of these technologies in 2-3 year time frame. Also need to consider sensor arrays and groups, to obtain data from multiple parameters simultaneously. A critical problem is in getting the sample to the sensor, and all handling/management issues therein. Some examples include: Leading Technologies: Smaller Spacecraft and Miniaturized Environmental Sensors Chemical laboratories that
enable multiple analyses -- even sequential analyses -- of a single
sample can fit on a compact disk. There are also other techniques and
methods of doing the same that are at generally the same level of readiness
(pre-commercial product). Mass spectrometers, ion mobility spectrometers, gas chromatographs, imaging systems in wavelengths spanning gamma ray through infrared are available within a soda can to shoebox volume. These can be miniaturized further. Examples: Ion Mobility Spectra of Unresolved Gas Chromatographic Peaks Instrument suites can be developed to fit within the envelope of a soda can, but require further development to effectively realize this potential. Cell and microbial culture and preservation facilities suitable for early Space Station were identified that could fit within the volume of a hockey puck. Even spacecraft can be miniaturized. DS2 is an outstanding example of this philosophy. Mars Microprobe Project • Development of sample management systems is urgently needed. A critical finding is that the state of the art of sample management -- sample acquisition, preparation, distribution, and preservation -- is seriously deficient and precludes the use of the vast array of capabilities available in miniaturized analytical instrumentation. This is a common problem -- in DARPA and in the biotech community as well as in NASA. It is recommended that the next technology NRA specifically address this problem. • Autonomous or remotely operated biolabs in situ (AROBIS) are recommended for research in hydrothermal vents, subterranean systems, deep drilling, planetary bodies. These should combine intelligent mechanism, robotics, and measurement technologies to provide a powerful multidisciplinary attack on characterizing sites for habitability, chemical evolution, and life. Related Links: Intelligent Mechanisms Group and Antarctic to Become Laboratory for Future Mars Missions • Hyperspectral imaging and analysis systems for remote (midrange) and in situ studies of planetary bodies is recommended for development. Applications of these technologies would preserve spatial features with the chemical and environmental data to enable selections among in situ examination strategies based on real time analysis. Specific instrument and algorithm development is needed to coordinate imaging and environmental data; build in the capacity to analyze information per pixel; apply adaptive analytical techniques; and harden for planetary exploration. DARPA/industry partnership opportunities are excellent. Relate link: OPTO-KNOWLEDGE SYSTEMS, Inc • Technologies that enable evolutionary biology studies and organism/environment interface characterization are recommended for Space Station. These technologies would enable the first definitive qualitative and quantitative molecular biology examinations of a wide range of terrestrial species, characterization of terrestrial evolution beyond Earth, and examination of co-evolution of life and the environment issues. • Direct microscopic imaging capability is recommended. Remote or autonomous operation of imaging systems in wide range of spectra, resolution, and amplification would provide a powerful new tool for in situ examination of planetary bodies. Related systems would have broad applications to Space Station. These systems should include intelligent analysis for autonomous operation that meet low bandwidth constraints. • Gas/Grain Simulation capability is recommended for Space Station -- to investigate the role of gravity in prebiotic chemistry, comet chemistry, aerosol chemistry, low gravity chemistry (Mars, Europa), and chemistry of interstellar medium. • Technologies that enable evolutionary biology studies and organism/environment interface characterization are recommended for Space Station. These technologies would enable the first definitive qualitative and quantitative molecular biology examinations of a wide range of terrestrial species, characterization of terrestrial evolution beyond Earth, and examination of co-evolution of life and the environment issues. (See Astrobiology Life Sciences Hardware Database.) APPROACHES: KEY FINDINGS • Produce an inventory of flight ready payload components for astrobiology. Certain devices are important in Astrobiology and would be instruments of choice for many different missions (e.g. comets, Mars, Europa). A selected few of these should be identified, prioritized, developed to a flight ready status, and duplicated for multiple use so that development funds can be spent on new products. • Provide instrument suites for exploring the Astrobiology of planetary bodies. Examining an environment like Mars, Europa, or comets for life or life's precursors requires a suite of instruments. Specific chemical species of interest (e.g., chirality, long chain carbon molecules (N>7 carbons), polyanions, polycations, changes in gas species, nitrogenous compounds) are only meaningful when characterized against the background environment of elemental abundances, temperature, pH, changes in climate history as seen in core samples, etc. Identifying the highest priority instruments and suites of interest and developing them to flight readiness is strongly urged. · Establish Astroforensics as a component of astrobiology mission planning. Adherence to standard forensic chain of evidence procedures is critical to all studies addressing the origin, evolution, and distribution of life in the universe. Forensic procedures have been developed to search for unknown clues and reconstruct a history from them under high stakes conditions. Forensics involves the analysis of small irreplaceable samples and intense even adversarial peer review and media scrutiny of the results. Astroforensics then, can be defined as a field within astrobiology concerned with evidence management and ensures that the evidence collected during astrobiology missions is not contaminated or otherwise compromised by the methods of detection, collection, transportation, analysis, storage, or subsequent re-testing. It also ensures that all methods of evidence identification, collection and analysis are validated (i.e. approved by the scientific community) and that results are repeatable. • Establish technology standards for peer review and selection of flight instruments. It is evident that today's technology enables significantly higher science return from missions. However, competition based peer review process usually does not select on the basis of optimization of total science results, either in payload synergy or in instrument optimization. The result is a lower science value per mission than could be achieved. It is suggested that certain miniaturized technologies and products should made flight ready and established as benchmarks. Proposers should plan to use these technologies, or demonstrate that their proposed research requires different technologies. Again, even new instruments should be miniaturized in order to amplify the science return from the more frequent, but still rare, missions to other worlds. • Interdisciplinary science, technology, and mission teams are recommended for all subsequent astrobiology workshops. Astrobiology workshop splinter group discussions require a mix of participants that bring various areas of expertise to the table. Scientists, engineers, and mission planners are all valuable and provide synergistic insights in all areas of astrobiology. Lessons learned from this and the other astrobiology pre-workshops is that new products and new directions are achieved when the "gene pool" of talent is broadened. In addition, some solutions are arrived at very rapidly because a problem in one field has been solved in another field. CONCLUSION: The current and projected state of the art can provide an impressive arsenal of tools for Astrobiology research on the remarkable set mission opportunities planned over the next decade. Executed correctly, these tools and techniques can help characterize the organic history and composition of other worlds, find sources of liquid water, and enable sophisticated searches for extant and extinct life in extreme environments throughout the solar system. Joint development and collaborations with industry, NSF, NIH, NOAA, DOE, DARPA and others can provide cost effective solutions to common problems, reduce the development cost and provide fresh practical perspectives on interdisciplinary problems.
AGENDA Advanced Measurement Systems for Astrobiology Workshop Ames Research Center
Wednesday, June 17, 1998 8:00 Continental Breakfast 8:30 Welcome John Hines Goals of Workshop Michael Flynn Astrobiology Overview--Dr. Chris McKay Background--Lynn Harper 9:00 Plenary Session In-situ Technologies--Dr. David Agresti Remote Sensing--Dr. Jeff Moersch Life Sensing--Dr. Paula Grunthaner 10:30 Break 10:45 Plenary Session (continued) Chem/Bio Defense Technologies--Dr. Jerome Holton Advanced Microscopy--Dr. Robert Silver Astroforensics--Dr. Richard Evans 12:00 Lunch 1:15 Charge to Breakout Sessions--John Hines/Michael Flynn 1:30 Breakout Sessions 3:15 Break 3:30 Breakout Sessions 6:00 Adjourn 6:30 Working dinner Thursday, June 18, 1998 8:00 Continental Breakfast 8:30 Summary Progress Reports from Breakout Sessions 9:45 Plenary Session Discriminative Biosensor for Mammalian Neurotoxins--Dr. Alex Simonian Microsensors/Micromachining Technologies for Astrobiology--Dr. Marc Madou 10:30 Break 10:45 Breakout Sessions 12:15 Lunch 1:15 Breakout Sessions Generate Results 3:00 Break 3:15 Plenary Session Short Summary--Present Results of Breakout Sessions Panel Discussion--AstroForensics Follow-on Projections 5:00 Adjourn workshop
Breakout Sessions
(by type or sort by BIO / GEO / CHEM)
Astrobiology "Measurement" Workshop June 17 and 18, 1998 Participants
David Agresti University of Alabama, Birmingham Brad Bebout NASA Ames Research Center Warren A. Belisle Lockheed Martin Engineering Sciences – Ames Research Center David F. Blake NASA Ames Research Center Martin G. Buehler Jet Propulsion Laboratory Keith Cowing Reston Communications Stephen E. Dunagan NASA Ames Research Center Richard Evans Office of the Chief Medical Examiner Boston, MA 02118 Mark Fairbank Office of the Chief Medical Examiner Boston, MA 02118 Jack D. Farmer NASA Ames Research Center Michael Flynn NASA Ames Research Center Jenny E. Freeman HyperMed Imaging, Inc. Frank Grunthaner Jet Propulsion Laboratory Paula J. Grunthaner Jet Propulsion Laboratory Philip D. Hammer NASA Ames Research Center Lynn D. Harper NASA Ames Research Center Michael H. Hecht Jet Propulsion Laboratory John Hines NASA Ames Research Center Michael Hines NASA Ames Research Center Mitch Hobish Baltimore, MD 21209 J. Jerome Holton Defense Group, Inc. Lester Hutt University of California, Berkeley Harry W. Jones, Jr. NASA Ames Research Center Mark H. Kliss NASA Ames Research Center David Kring The Lunar and Planetary Laboratory University of Arizona James L. Lambert Jet Propulsion Laboratory Shoudan Liang SETI Institute/Ames Research Center Marc J. Madou Ohio State University Raymond P. Mariella Jr. Lawrence Livermore National Laboratory Gene D. McDonald Jet Propulsion Laboratory Gordon McFeters Microbiology Department Montana State University Christopher P. McKay NASA Ames Research Center Jeffrey E. Moersch NRC Ames Research Center Richard C. Quinn SETI Institute/Ames Research Center Gregory K. Schmidt NASA Ames Research Center Barbara Seiders Battelle, Pacific Northwest National Lab Seth Shostak SETI Institute Robert Silver Marine Biological Laboratory Aleksandr L. Simonian Texas A&M University Biochemistry & Biophysics Department K.R. Sridhar University of Arizona William P. Wiesmann BioSTAR, inc. Peter Wilding University of Pennsylvania Medical Center Robert R. Zimmerman Symbiotek
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