Data Access
This data set contains 17 differential fluxes of protons (mainly), helium ions, Z.GE.6 ions, and electrons, plus one integral flux of protons and electrons, as averaged over polar cap passes of the SAMPEX spacecraft. A polar cap pass covers the time poleward of geomagnetic latitude 70 deg. (Not all orbits have two polar cap passes.). For any given species, the fluxes typically come from more than one of the sensors (LICA, HILT, MAST, PET). Hence the inclusion of all instruments' data in each single record. Differential fluxes are those for (mainly) protons (Z.GE.1 channels at 5-12 and 19-27 MeV/n), helium ions (0.50-6.6, 4-9, 8-15, 9-38 MeV/n), Z.GE.6 ions (0.49-8.3, 8-42, 19.3-22.8, 22.8-31.0, 31.0-51.7, 41-220, 51.7-76.2, 76.2-113, 113-156 MeV/n), and electrons (1.5-6.0 MeV from PET only). One LICA channel measured integral fluxes of ions .GT. 0.8 MeV/n plus electrons .GT. 0.6 MeV). Data available for each polar cap pass are time tags of the begin and end points of the averaging interval, the fluxes, statistical uncertainties in the fluxes, instrument-specific flags, and a flag indicating a north or south polar cap pass. Data are organized in two different ways. Monthly ~500-KB ASCII files with records organized by instrument are available from the SAMPEX Data Center at Caltech and from nssdcftp at GSFC/SPDF, while monthly ~260 KB CDF-formatted files with records organized by species are available from the ftp area underlying CDAWeb. The parameter level information given below in this descriptor corresponds to the CDAWeb organization of data. Format information for the ASCII version is given in the Information URL of this descriptor.
Version:2.6.0
This data set contains 17 differential fluxes of protons (mainly), helium ions, Z.GE.6 ions, and electrons, plus one integral flux of protons and electrons, as averaged over polar cap passes of the SAMPEX spacecraft. A polar cap pass covers the time poleward of geomagnetic latitude 70 deg. (Not all orbits have two polar cap passes.). For any given species, the fluxes typically come from more than one of the sensors (LICA, HILT, MAST, PET). Hence the inclusion of all instruments' data in each single record. Differential fluxes are those for (mainly) protons (Z.GE.1 channels at 5-12 and 19-27 MeV/n), helium ions (0.50-6.6, 4-9, 8-15, 9-38 MeV/n), Z.GE.6 ions (0.49-8.3, 8-42, 19.3-22.8, 22.8-31.0, 31.0-51.7, 41-220, 51.7-76.2, 76.2-113, 113-156 MeV/n), and electrons (1.5-6.0 MeV from PET only). One LICA channel measured integral fluxes of ions .GT. 0.8 MeV/n plus electrons .GT. 0.6 MeV). Data available for each polar cap pass are time tags of the begin and end points of the averaging interval, the fluxes, statistical uncertainties in the fluxes, instrument-specific flags, and a flag indicating a north or south polar cap pass. Data are organized in two different ways. Monthly ~500-KB ASCII files with records organized by instrument are available from the SAMPEX Data Center at Caltech and from nssdcftp at GSFC/SPDF, while monthly ~260 KB CDF-formatted files with records organized by species are available from the ftp area underlying CDAWeb. The parameter level information given below in this descriptor corresponds to the CDAWeb organization of data. Format information for the ASCII version is given in the Information URL of this descriptor.
| Role | Person | StartDate | StopDate | Note | |
|---|---|---|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/Glenn.M.Mason | |||
| 2. | GeneralContact | spase://SMWG/Person/Richard.A.Mewaldt | |||
| 3. | MetadataContact | spase://SMWG/Person/Lee.Frost.Bargatze |
Extensive PDF document prepared by M. Lennard, J. Mazur, and G. Mason originally in 1996 and most recently updated in 2007 to describe the many NSSDC-resident SAMPEX data sets, including the polar cap averaged fluxes. This document also identifies a series of mission and instrument papers at IEEE Transactions on Geoscience and Remote Sensing, Vol. 31, No. 3, May 1993
In CDF via HTTP from CDAWeb
Plots, lists and files from CDAWeb.Name of the data resource:SX_K0_POF
Web Service to this product using the HAPI interface.
In ASCII via ftp from SDC
Time of entry into polar cap and of start of averaging of fluxes, expressed in ISO time format (YYYY_MM_DDTHH:MM:SS.SZ)
Time of exit from polar cap and of end of averaging of fluxes, expressed in ISO time format (YYYY_MM_DDTHH:MM:SS.SZ)
Takes value 0 for south pole pass, 1 for north pole pass
Four flags associated with the LICA instrument. See Information URL given above for meanings of flags and their values.
The 4 LICA flags
Six flags associated with the HILT instrument. See Information URL given above for meanings of flags and their values.
The 6 HILT flags
Three flags associated with the MAST instrument. See Information URL given above for meanings of flags and their values.
The 3 MAST flags
Three flags associated with the PET instrument. See Information URL given above for meanings of flags and their values.
The 3 PET flags
Polar-cap-averaged fluxes of Z.GE.6 ions in 9 energy bins listed above, from LICA, HILT and MAST instruments. We note a discrepancy between CDAWeb's use of "Z.GT.2" and the Project's use of "Z.GE.6" for these fluxes. See Appendix 7 of the document at the above referenced Information URL.
The 9 Z.GE.6 fluxes
Polar-cap-averaged fluxes of helium ions in 4 energy bins listed above, from LICA, HILT and MAST instruments
The 4 Helium ion fluxes
Polar-cap-averaged fluxes of protons in 2 energy bins listed above, from MAST and PET instruments. These are actually Z.GE.1 measurements.
The 2 proton fluxes
Polar-cap-averaged fluxes of electrons in 2 energy bins listed above, from the PET instrument.
The 2 electron fluxes
Polar-cap-averaged integral fluxes, mainly of protons above 0.8 MeV and electrons above 0.6 MeV, from LICA
Statistical uncertainites in polar-cap-averaged fluxes of Z.GE.6 ions in 9 energy bins listed above, from LICA, HILT and MAST instruments
Uncertainties in the 9 Z.GE.6 fluxes
Statistical uncertainites in polar-cap-averaged fluxes of helium ions in 4 energy bins listed above, from LICA, HILT and MAST instruments
Uncertainties in the 4 helium fluxes
Statistical uncertainites in polar-cap-averaged fluxes of protons in 2 energy bins listed above, from MAST and PET instruments
Uncertainties in the 2 proton fluxes
Statistical uncertainites in polar-cap-averaged fluxes of electrons in 2 energy bins listed above, from PET instrument
Uncertainties in the 2 electron fluxes
Statistical uncertainties in polar-cap-averaged integral fluxes, mainly of protons above 0.8 MeV and electrons above 0.6 MeV, from LICA