This dataset contains high time resolution MEPA rate channel data. MEPA is a particle telescope with an ION head and a TOF head. The TOF head can measure species and energy, while the ION head only measures the energy of the ions, which are mostly protons. In fact, the counts in the ION head are all assumed to be protons up to 1830 keV. The ION head has 10 energy channels, and so the first 8 channels, that are all below 1830 keV, are assumed to be all protons, and the 2 channels above this are assumed to be all alphas. The TOF head has 9 energy channels that are generic, ions of any species are counted, and some species specific channels for protons, helium, oxygen, and iron. The AMPTE data was divided into records, with each record holding data from 4 spins. In any record, all the TOF species channels are always present, but only one of either a, the 10 ION head channels or b, 9 TOF generic channels are present. The majority of records have the ION head channels. The AMPTE spacecraft had a spin period of about 6 seconds. The exact spin period varies slightly and is included in the data. MEPA data is sectored into 32 directions per spin. Nearly all channels are reported as sectored values, but to conserve telemetry, many channels are only read out every other spin, or every fourth spin. In this data, all values are summed so that they are reported every fourth spin. Note that in the original AMPTE datesets, there was a timing problem which required that 19.75 seconds, one Major Frame of telemetry, be added to time values extracted from the processing system. This correction has already been made in the particle data in this dataset.
Version:2.2.9
This dataset contains high time resolution MEPA rate channel data. MEPA is a particle telescope with an ION head and a TOF head. The TOF head can measure species and energy, while the ION head only measures the energy of the ions, which are mostly protons. In fact, the counts in the ION head are all assumed to be protons up to 1830 keV. The ION head has 10 energy channels, and so the first 8 channels, that are all below 1830 keV, are assumed to be all protons, and the 2 channels above this are assumed to be all alphas. The TOF head has 9 energy channels that are generic, ions of any species are counted, and some species specific channels for protons, helium, oxygen, and iron. The AMPTE data was divided into records, with each record holding data from 4 spins. In any record, all the TOF species channels are always present, but only one of either a, the 10 ION head channels or b, 9 TOF generic channels are present. The majority of records have the ION head channels. The AMPTE spacecraft had a spin period of about 6 seconds. The exact spin period varies slightly and is included in the data. MEPA data is sectored into 32 directions per spin. Nearly all channels are reported as sectored values, but to conserve telemetry, many channels are only read out every other spin, or every fourth spin. In this data, all values are summed so that they are reported every fourth spin. Note that in the original AMPTE datesets, there was a timing problem which required that 19.75 seconds, one Major Frame of telemetry, be added to time values extracted from the processing system. This correction has already been made in the particle data in this dataset.
| Role | Person | |
|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/Richard.W.McEntire |
| 2. | MetadataContact | spase://SMWG/Person/Robert.E.McGuire |
| 3. | MetadataContact | spase://SMWG/Person/Lee.Frost.Bargatze |
AMPTE/CCE MEPA Information and Data
Access to Data in CDF Format via ftp from SPDF
Access to Data in CDF Format via http from SPDF
Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb
Epoch for Proton and Helium Counts
Spin Period, for Proton and Helium Counts
Sector, for Proton and Helium Counts
Gain, for Proton and Helium Counts
Protons, Counts per Sector, Spectrogram, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, Ion Records only
Protons, Counts Rate per Sector, Spectrogram
Protons, Differential Intensity per Sector, Spectrogram
Protons, Counts per Sector, Stack Plot, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, Ion Records only
Protons, Counts Rate per Sector, Stack Plot
Protons, Differential Intensity per Sector, Stack Plot
Protons, Channel Names
Protons, Lower Range Limit of Energy Channels
Protons, Upper Range Limit of Energy Channels
Protons, Actual Daily Values of the Channel Midpoint Energies at the Middle of the Day
Protons, Channel Numbers
Protons, Daily Values for the Actual Channel Energy Ranges, from the Low End to the Midpoint of each Channel at the Middle of the Day for the Channels in the corresponding Spectrum
Protons, Daily Values for the Actual Channel Energy Ranges, from the Midpoint to the High End of each Channel at the Middle of the Day for the Channels in the corresponding Spectrum
Helium, Counts per Sector, Spectrogram, with each Sector being a Sum from 4 Spins, the Time given is the Sector Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, Ion Records only
Helium, Counts Rate per Sector, Spectrogram
Helium, Differential Intensity per Sector, Spectrogram
Helium, Counts per Sector, Stack Plot, with each Sector being a Sum from 4 Spins, the Time given is the Sector Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, Ion Records only
Helium, Counts Rate per Sector, Stack Plot
Helium, Differential Intensity per Sector, Stack Plot
Helium, Channel Names
Helium, Lower Range Limit of Energy Channels
Helium, Upper Range Limit of Energy Channels
Helium, Actual Daily Values of the Channel Midpoint Energies at the Middle of the Day
Helium, Daily Values for the Actual Channel Energy Ranges, from the Low End to the Midpoint of each Channel at the Middle of the Day for the Channels in the corresponding Spectrum
Helium, Daily Values for the Actual Channel Energy Ranges, from the Midpoint to the High End of each Channel at the Middle of the Day for the Channels in the corresponding Spectrum
Epoch 1, for the Micro-Channel Plate, MCP, Solid State Detector, SSD, and Time of Flight, TOF, Data
Spin Period 1, for the Micro-Channel Plate, MCP, Solid State Detector, SSD, and Time of Flight, TOF, Data
Sector 1, for the Micro-Channel Plate, MCP, Solid State Detector, SSD, and Time of Flight, TOF, Data
Gain 1, for the Micro-Channel Plate, MCP, Solid State Detector, SSD, and Time of Flight, TOF, Data
Micro-Channel Plate, MCP, 1, Count Rate from Counts summed over 4 Spins
Micro-Channel Plate, MCP, 2, Count Rate from Counts summed over 4 Spins
Micro-Channel Plate, MCP, 3, Count Rate from Counts summed over 4 Spins
Solid State Detector, SSD, Count Rate from Counts summed over 4 Spins
Protons, TOF, Counts per Sector, Spectrogram, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_1 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, either Ion or TOF Records
Protons, TOF, Counts Rate per Sector, Spectrogram
Protons, TOF, Differential Intensity per Sector, Spectrogram
Protons, TOF, Counts per Sector, Stack Plot, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_1 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, either Ion or TOF Records
Protons, TOF, Counts Rate per Sector, Stack Plot
Protons, TOF, Differential Intensity per Sector, Stack Plot
Protons, TOF, Channel Names
Protons, TOF, Lower Range Limit of Energy Channels
Protons, TOF, Upper Range Limit of Energy Channels
Protons, TOF, Daily Values of the Channel Midpoint Energies
Protons, TOF, Daily Values for the Channel Energy Ranges, Low to Mid
Protons, TOF, Daily Values for the Channel Energy Ranges, Mid to High
Helium, TOF, Counts per Sector, Spectrogram, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_1 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, either Ion or TOF Records
Helium, TOF, Counts Rate per Sector, Spectrogram
Helium, TOF, Differential Intensity per Sector, Spectrogram
Helium, TOF, Counts per Sector, Stack Plot, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_1 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, either Ion or TOF Records
Helium, TOF, Counts Rate per Sector, Stack Plot
Helium, TOF, Differential Intensity per Sector, Stack Plot
Helium, TOF, Channel Names
Helium, TOF, Lower Range Limit of Energy Channels
Helium, TOF, Upper Range Limit of Energy Channels
Helium, TOF, Daily Values of the Channel Midpoint Energies
Helium, TOF, Daily Values for the Channel Energy Ranges, Low to Mid
Helium, TOF, Daily Values for the Channel Energy Ranges, Mid to High
Oxygen, TOF, Counts per Sector, Spectrogram, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_1 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, either Ion or TOF Records
Oxygen, TOF, Counts Rate per Sector, Spectrogram
Oxygen, TOF, Differential Intensity per Sector, Spectrogram
Oxygen, TOF, Counts per Sector, Stack Plot, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_1 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, either Ion or TOF Records
Oxygen, TOF, Counts Rate per Sector, Stack Plot
Oxygen, TOF, Differential Intensity per Sector, Stack Plot
Oxygen, TOF, Channel Names
Oxygen, TOF, Lower Range Limit of Energy Channels
Oxygen, TOF, Upper Range Limit of Energy Channels
Oxygen, TOF, Daily Values of the Channel Midpoint Energies
Oxygen, TOF, Daily Values for the Channel Energy Ranges, Low to Mid
Oxygen, TOF, Daily Values for the Channel Energy Ranges, Mid to High
Iron, TOF, Counts per Sector, Spectrogram, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_1 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, either Ion or TOF Records
Iron, TOF, Counts Rate per Sector, Spectrogram
Iron, TOF, Differential Intensity per Sector, Spectrogram
Iron, TOF, Counts per Sector, Stack Plot, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_1 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, either Ion or TOF Records
Iron, TOF, Counts Rate per Sector, Stack Plot
Iron, TOF, Differential Intensity per Sector, Stack Plot
Iron, TOF, Channel Names
Iron, TOF, Lower Range Limit of Energy Channels
Iron, TOF, Upper Range Limit of Energy Channels
Iron, TOF, Daily Values of the Channel Midpoint Energies
Iron, TOF, Daily Values for the Channel Energy Ranges, Low to Mid
Iron, TOF, Daily Values for the Channel Energy Ranges, Mid to High
Epoch 2, for all Ion Counts, Time of Flight, TOF
Spin Period 2, for all Ion Counts, Time of Flight, TOF
Sector 2, for all Ion Counts, Time of Flight, TOF
Gain 2, for all Ion Counts, Time of Flight, TOF
All Ions, TOF, Counts per Sector, Spectrogram, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_2 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, TOF Records only
All Ions, TOF, Counts Rate per Sector, Spectrogram
All Ions, TOF, Differential Intensity per Sector, Spectrogram
All Ions, TOF, Counts per Sector, Stack Plot, with each Sector being a Sum from 4 Spins, the Time given is the SECTOR_2 Midpoint in Spin 2 out of Spins 0, 1, 2, and 3, TOF Records only
All Ions, TOF, Counts Rate per Sector, Stack Plot
All Ions, TOF, Differential Intensity per Sector, Stack Plot
All Ions, TOF, Channel Names
All Ions, TOF, Lower Range Limit of Energy Channel Ranges
All Ions, TOF, Upper Range Limit of Energy Channel Ranges
Epoch 3, for High-Resolution Proton Counts
Spin Period 3, for High-Resolution Proton Counts
Sector 3, for High-Resolution Proton Counts
Gain 3, for High-Resolution Proton Counts
Protons, High-Resolution Counts for every Sector in every Spin, Spectrogram, the Time given is the Midpoint of SECTOR_3, Ion Records only
Protons, High-Resolution Counts Rate for every Sector in every Spin, Spectrogram
Protons, High-Resolution Differential Intensity for every Sector in every Spin, Spectrogram
Protons, High-Resolution Counts for every Sector in every Spin, Stack Plot, the Time given is the Midpoint of SECTOR_3, Ion Records only
Protons, High-Resolution Counts Rate for every Sector in every Spin, Stack Plot
Protons, High-Resolution Differential Intensity for every Sector in every Spin, Stack Plot
Protons, High-Resolution Channel Names
Protons, High-Resolution Lower Range Limit of Energy Channels
Protons, High-Resolution Upper Range Limit of Energy Channels
Protons, High-Resolution Daily Values of the Channel Midpoint Energies
Protons, High-Resolution Daily Values for the Channel Energy Ranges, Low to Mid
Protons, High-Resolution Daily Values for the Channel Energy Ranges, Mid to High
Epoch 4, for Spin Axis Direction and Magnetic Field Vector
Spacecraft Spin Axis Direction, Unit Vector, Geocentric Solar Ecliptic, GSE, Coordinates
Magnetic Field Vector, at Sector Midpoints, Geocentric Solar Ecliptic, GSE, Coordinates