2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/NumericalData/ACE/SWEPAM/SWICS/PT12M NASA NumericalData ACE SWEPAM/SWICS Level 3 Merged Solar Wind Proton Data https://doi.org/10.48322/fba2-gy35 2025-12-04T13:28:25Z 2020-07-07T21:14:15Z Only known prior ReleaseDate of the metadata 2025-05-22T18:14:41 Removed spaces from description; added Naming Authority and resource type. TLK 2025-11-14T16:01:45Z Added PublicationInfo. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB 2025-12-04T13:28:25Z Added MetadataRightsList. Updated to 2.7.1. ZCB These data files contain 12-min resolution solar wind proton flow velocity (GSE, RTN and GSM components), scalar speed, density, and (radial component of) temperature, plus the alpha particle to proton density ratio. The data are typically from the SWEPAM instrument. But because SWEPAM has reduced sensitivity at the lowest energies, and at times underestimates the proton density, especially for very slow wind, proton density is sometimes culled from low-speed (.LT. ~350 km/s) intervals in the SWEPAM Level 2 data, and proton temperature may also be culled. More rarely, the solar wind velocity may also be culled, especially during periods of both high solar energetic particle background and high wind speeds. In these cases, SWICS-determined proton density and temperature, and possibly also flow speed (not velocity vectors), are included in the data records, with a flag to indicate whether, and which, SWICS parameters are in the records. As of July, 2012, data were available to the end of 2009. Please acknowledge the ACE/SWEPAM and SWICS instrument teams and the ACE Science Center McComas, David J.; Gloeckler, George 2025-11-14T16:01:45Z California Institute of Technology spase://SMWG/Person/Ruth.Skoug TechnicalContact spase://SMWG/Person/David.J.McComas PrincipalInvestigator spase://SMWG/Person/George.Gloeckler PrincipalInvestigator ACE SWEPAM Level 3 Data Home Page http://www.srl.caltech.edu/ACE/ASC/level2/sweswi_l3desc.html ACE Science Center site describing SWEPAM/SWICS merged solar wind proton data set spase://VSPO/NumericalData/ACE/SWEPAM/SWICS/PT12M spase://SMWG/Repository/ACE_SC Online Open ACE Science Center Interactive Interface http://www.srl.caltech.edu/ACE/ASC/DATA/level3/swepam/data/ Subset, plot, or list data Text Please acknowledge the ACE/SWEPAM and SWICS instrument teams and the ACE Science Center Level 3 spase://SMWG/Instrument/ACE/SWEPAM spase://SMWG/Instrument/ACE/SWICS ThermalPlasma 1998-01-28T00:00:12Z -P2Y PT12M Heliosphere.NearEarth