urn:nasa:pds:context:instrument:cplee.a14a 1.0 1.11.0.0 Product_Context Apollo 14 CPLEE 2019-02-27 1.0 Created by the NASA Space Science Data Coordinated Archive. urn:nasa:pds:context:instrument_host:spacecraft.a14a instrument_to_instrument_host urn:nasa:pds:apollodoc:a14doc:a14a_cplee_overview instrument_to_document Apollo 14 Preliminary Science Report, NASA SP-272, NASA, Washington, D.C., 1971. Apollo Scientific Experiments Data Handbook, JSC-09166, NASA TMX-58131, August 1974 (revised April 1976), in Johnson Space Center History Office. Apollo 14 Charged Particle Lunar Environment Experiment Particle Detector not applicable not applicable The Apollo 14 Charged Particle Lunar Environment Experiment (CPLEE) measured the energy spectra of low-energy charged particles striking the lunar surface by observing the fluxes of electrons and ions with energies from 40 eV to 20 keV in two directions: local vertical and 60 degrees from vertical toward lunar west. The primary purpose of the experiment was to examine plasma particles originating from the Sun and the low-energy particle flux in the magnetic tail of the Earth.