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    <logical_identifier>urn:nasa:pds:apollodoc:a15doc:a15a_hfe_overview</logical_identifier>
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    <title>Overview of the Apollo 15 Heat Flow Experiment (HFE)</title>
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      <author_list>Williams, D.R.</author_list>
      <editor_list>McLaughlin, S.A.</editor_list>
      <publication_year>2017</publication_year>
      <description>This document provides an overview of the Apollo 15 Heat Flow Experiment (HFE)
      which was part of the Apollo 15 Lunar Surface Experiments Package (ALSEP).</description>
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  <Reference_List>
    <External_Reference>
      <reference_text>Apollo 15 Preliminary Science Report, NASA SP-289, published by NASA,
      Washington, D.C., 1972.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Apollo Scientific Experiments Data Handbook, NASA Technical Memorandum
      X-58131, JSC-09166, published by NASA Johnson Space Center, Houston, Texas, Aug. 1974
      (revised Apr. 1976).</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Keihm, S.J., and M.G. Langseth, Jr., Surface brightness temperatures at the
      Apollo 15 heat flow site: Thermal conductivity of the upper 15 cm of regolith, Proceedings of
      the Lunar Science Conference, 4th, Volume 3, pages 2503-2513, 1973.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Keihm, S.J., J.L. Chute, K. Peters, and M.G. Langseth, Apollo 15 measurement
      of lunar surface brightness temperatures - thermal conductivity of the upper 1 1/2 meters of
      regolith, Earth Planetary Science Letters, 19, No. 3, pages 337-351, July
      1973.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Langseth, M.G., Jr., Lunar Heat-Flow Experiment: Final Technical Report: 6
      Jun. 1966 - 30 Jun. 1975, NASA-CR-151619, CU-4-77, 289p, Lamont-Doherty Geological
      Observatory of Columbia University, Palisades, New York, 1977.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Langseth, M.G., Jr., S.P. Clark Jr., J.L. Chute, Jr., S.J. Keihm, and A.E.
      Wechsler, The Apollo 15 Lunar Heat-Flow Measurement, In The Moon, Volume 4, Issue 3-4, pages
      390-410, 1972.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Langseth, M.G., Jr., S.J. Keihm, J.L. Chute, Jr., and A.E. Wechsler, Heat
      flow experiment, In Apollo 15 Preliminary Science Report, Section 11, NASA SP-289, published
      by NASA, Washington, D.C., 1972.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Langseth, M.G., Jr., S.J. Keihm, and J.L. Chute, Jr., Heat flow experiment,
      Apollo 15 Preliminary Science Report, NASA SP-330, 9-1, published by NASA, Washington, D.C.,
      1973.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Langseth, M.G., Jr., S.J. Keihm, and K. Peters, Revised lunar heat-flow
      values, Proceedings of the Lunar Science Conference, 7th, Volume 3, pages 3143-3171,
      1976.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Nagihara, M.G., Y. Saito, and P.T. Taylor, Reexamination Of the Apollo 15
      Heat Flow Data Toward Understanding Potential Causes Of The Long-Term Subsurface Warming
      Observed, In: Abstracts of Papers Submitted to the 41th Lunar and Planetary Science
      Conference, Volume 41, Abstract 1353, 2010.</reference_text>
    </External_Reference>
    <External_Reference>
      <doi>10.1029/2018JE005579</doi>
      <reference_text>Nagihara, S., W.S. Kiefer, P.T. Taylor, D.R. Williams, and Y. Nakamura,
      Examination of the long-term subsurface warming observed at the Apollo 15 and 17 sites
      utilizing the newly restored heat flow experiment data from 1975 to 1977, Journal of
      Geophysical Research: Planets, 123, 1125-1139, 2018.</reference_text>
    </External_Reference>
  </Reference_List>
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    <acknowledgement_text>Document provided by the NASA Space Science Data Coordinated Archive
    (NSSDCA, formerly NSSDC)</acknowledgement_text>
    <publication_date>2017</publication_date>
    <description>Overview of the Apollo 15 Heat Flow Experiment (HFE) which was part of the Apollo
    15 Lunar Surface Experiments Package (ALSEP).</description>
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