ACE Solar Wind Electron Proton Alpha Monitor (SWEPAM) 64-Second Level 2 Data

Solar Wind Ion parameters from ACE/SWEPAM. Level 2 data, 64-second averages. Parameters include proton density, temperature (radial component) and flow speed, flow velocity vector in GSE, GSM and RTN coordinates, and alpha to proton density ratio. ACE position vectors in GSE and GSM are included. The data are accessible via ftp in HDF and CDF from the ACE Science Center and CDAWeb, respectively, and in ASCII format from the value-added interfaces at those sites. Hourly averaged L2 plasma parameters are also available from these access paths. The "parameter keys" given below are as used by CDAWeb.

Data and Resources

Additional Info

Field	Value
Maintainer	NASA Space Physics Data Facility
Last Updated	March 23, 2026, 19:37 (UTC)
Created	August 21, 2025, 13:19 (UTC)
accessLevel	public
bureauCode	{026:00}
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harvest_source_id	b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title	Science Discovery Engine
identifier	https://doi.org/10.48322/tsfn-6v47
landingPage	https://doi.org/10.48322/tsfn-6v47
license	https://www.usa.gov/government-works
modified	2026-03-16T22:16:00Z
programCode	{026:000}
publisher	NASA Space Physics Data Facility (SPDF) Data Services;SRL ACE Science Center;ASC
resource-type	Dataset
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