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Apollo12_SWS_1hr CDF, Solar Wind Spectrometer Hour Average (LDP)

NSSDCA ID: PSPA-00417

Availability: At NSSDC, Ready for Electronic Access

Description

This data set was reformatted from the original binary data set PSFP-00117 in December 2006 by NSSDC as part of the Lunar Data Restoration project. The data were put into CDF format for easier access and use. This data set contains hourly averaged plasma parameters (mainly of the solar wind) as observed on the moon at the Apollo 12 ALSEP site.

Four sets of hourly averaged parameters are computed, using as input data -- (1) all fine-time scale parameters (FTSP), (2) all FTSP computed from spectra with small rms error on curve fitting and thermal speeds less than one-half the bulk velocity, (3) all FTSP computed from spectra that satisfy the requirements of criterion 2 as well as having only one flow angle that can be directly measured, and (4) all FTSP computed from spectra that satisfy the requirements of criterion 2 as well as having both flow angles directly measureable. Contained in each of the 4 sets of averages are the proton density, alpha-to-proton ratio, bulk speed, angle of flow, number of spectra, and rms deviations of each average.

During the local lunar night there is no solar wind signal so there are data gaps of about 15 days each lunation.

The data set is available for user-selected plotting or data download at NSSDC's interactive CDAWeb site:

http://cdaweb.gsfc.nasa.gov/cdaweb/lunar/

under the source "Apollo". The data are also available as PDS data sets, see:

http://pds-geosciences.wustl.edu/missions/apollo/

Alternate Names

  • Apollo12_SWS_1hr SW Spectrom. CDF

Disciplines

  • Planetary Science: Atmospheres
  • Space Physics: Heliospheric Studies

Additional Information

Spacecraft

Experiments

Questions and comments about this data collection can be directed to: Dr. H. Kent Hills

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. Conway W. SnyderData ProviderNASA Jet Propulsion Laboratory
Dr. Marcia M. NeugebauerGeneral ContactNASA Jet Propulsion Laboratorymarcia.neugebauer@jpl.nasa.gov

Selected References

  • Neugebauer, M., et al., Solar wind observations on the lunar surface with the Apollo-12 ALSEP, Planet. Space Sci., 20, 1577-1591, doi:10.1016/0032-0633(72)90184-5, Oct. 1972.
  • Clay, D. R., et al., Lunar surface solar wind observations at the Apollo 12 and Apollo 15 sites, J. Geophys. Res., 80, No. 13, 1751-1760, doi:10.1029/JA080i013p01751, May 1975.
  • Bates, J. R., et al., ALSEP termination report, NASA, RP-1036, Wash., DC, Apr. 1979.
  • Snyder, C. W., et al., The solar-wind spectrometer experiment, in Apollo 12 Preliminary Science Report, NASA SP-235, 75-81, 1970.

Related Data/Information at NSSDCA

Apollo 12 Solar Wind Spectrometer Hour Average Data Record
Apollo 12 Solar Wind Spectrometer 28 s Average Data Record
Apollo 15 Solar Wind Spectrometer Hour Average Data Record
Apollo 15 Solar Wind Spectrometer 28s Average Data Record

Related Information at NSSDCA

Apollo landing sites and ALSEP and LRRR locations - and information on the modified DMA/603 control network

Lunar Data Project
Apollo Home Page

Solar Wind Spectrometer Available On-line

Solar Wind Spectrometer and other lunar data on CDAWeb
Solar Wind Spectrometer and other Apollo data at the Planetary Data System

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