Apollo 12 Solar Wind Measurements at the Lunar Surface 1-HR Data

This data set contains hourly averaged plasma parameters from the Apollo 12 Solar Wind Spectrometer. 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.

Data and Resources

Field Value
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier https://doi.org/10.48322/vars-pj10
landingPage https://doi.org/10.48322/vars-pj10
modified 2025-09-10
programCode {026:000}
publisher NASA Space Physics Data Facility (SPDF) Coordinated Data Analysis Web (CDAWeb) Data Services
resource-type Dataset
source_datajson_identifier true
source_hash e418f244781f09d1adc5469663cd6c6c3abe753076e2af8cb6d574351ba16dd0
source_schema_version 1.1
temporal 1969-11-19/1976-03-25
theme {Heliophysics}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • thermalplasma
isopen False
license_id notspecified
license_title License not specified
maintainer David R. Williams
maintainer_email NASA-SPDF-Support@nasa.onmicrosoft.com
metadata_created 2025-09-23T15:47:33.478072
metadata_modified 2025-09-23T15:47:33.478079
notes This data set contains hourly averaged plasma parameters from the Apollo 12 Solar Wind Spectrometer. 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.
num_resources 1
num_tags 9
title Apollo 12 Solar Wind Measurements at the Lunar Surface 1-HR Data