Helios 2 E6 Hourly Particle Fluxes in CDF Format

2021-04-27 15:38:11Z

particle_flux>E6 - Merged proton, electron and alpha particle fluxes. Helios-A and Helios-B Spacecraft were a Pair of Deep Space Probes developed by the Federal Republic of Germany, FRG, in a Cooperative Program with NASA. The Purpose of the Mission was to make pioneering Measurements of the Interplanetary Medium from the Vicinity of the Earth Orbit to 0.3 AU. The Objective of Experiment, E6, was to study High-Energy, Charged, Cosmic Ray Particles of Solar, Planetary, and Galactic Origin in Interplanetary Space. Protons and Alpha Particles with Energies >1.3 MeV/n, and electrons >3.3 MeV were measured within Interplanetary Space over the Range from 0.3 to 1.0 A.U. The Instrument, a Particle Telescope with 55$#176; Field of View, consisted of five Semiconductor Detectors, one Sapphire Cherenkov Counter, and one Scintillation Counter, all enclosed by an Anticoincidence Cylinder. The Telescope was calibrated prior to Launch using Radioactive Sources, Particle Acceletors, and Ground-Level Muons. It measured Protons and Alpha particles in six Channels, 1.3 to 3.3, 3.3 to 13, 13 to 27, 27 to 37, 37 to 45, and >45 MeV/n, and Electrons in five Energy Channels, 0.3 to 0.8, 0.8 to 2, 2 to 3, 3 to 4, and >4 MeV. For more Detail See pages 253-257 of Raumfahrtforschung, Volume 19, Number 5, 1975. The Helios-A Cosmic Ray '.dat' and Helios-B Cosmic Ray '.dat' files contains hourly averaged Fluxes of Electrons, Protons and Alpha Particles in the MeV Ranges. The Files were written in ASCII-Codes. Each Record contains 10 hourly Averages. The Differential Fluxes, (m^2 s sr MeV)^-1, Cover, in several Bands, the Energy Range 0.3 to 2.0 MeV for Electrons, 4.0 to 51 MeV for Protons, and 2.0 to 48 MeV for Alpha Particles. Also provided are the Integral Fluxes of Alphas above 48 MeV, and Protons above 51 MeV. For some of the Energy Channels, the Standard Deviations of the Averages are also provided. Each File is preceded by a Header Record, providing the Start and Stop Times of the Data in the File. The Acronyms for the Rate Channels are composed of a Letter and an Indication of the Energy Range in MeV/n for Protons and Alpha Particles, respectively and MeV for Electrons. The counting Rates are given as (m^2 s sr MeV/n)^-1 except for the Integral Channels P>51 and A>48, which are given as (m^2 s sr)^-1. Note: 1. Negative Rates, -0.99999E+04, indicate Missing or Invalid Data. 2. The Energy Boundaries for the Electron Channels 0.2 to 0.8 and 0.8 to 2 are only rough Estimates.

H. Kunow

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H. Kunow. Please acknowledge the data providers and CDAWeb when using these data.

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PT1H

Epoch

Epoch

Default Time

PT1H

ms

1e-3>s

01-Jan-1000 00:00:00.000

01-Jan-3000 00:00:00.000

31-Dec-9999 23:59:59.999

Proton Flux

Time series defined by using: EPOCH

p_flux

Proton Flux, 5 Bands: 4 MeV/n to 51 MeV/n

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Proton Flux, Spectrogram

Time series defined by using: EPOCH

p_flux_s

Proton Flux, Spectrogram

This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: p_flux.

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Proton Flux Standard Deviation

Time series defined by using: EPOCH

p_flux_sd

Proton Flux Standard Deviation

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Proton Flux Standard Deviation, Spectrogram

Time series defined by using: EPOCH

p_flux_sd_s

Proton Flux Standard Deviation, Spectrogram

This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: p_flux_sd.

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Proton Flux Energy Channels, Y Axis Labels

Time series defined by using: EPOCH

p_flux_yaxis

Proton Flux Energy Channels, Y Axis Labels

PT1H

MeV

1.60218e-13>J

0.0

1.0e+31

-1.0e+31

Proton Flux Energy Channels

Time series defined by using: EPOCH

p_flux_energy

Proton Flux Energy Channels

PT1H

MeV

1.60218e-13>J

1.0

100.0

-1.0e+31

Electron Flux

Time series defined by using: EPOCH

e_flux

Electron Flux, 3 Bands: 0.3 MeV/n to 2 MeV/n

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Electron Flux

Time series defined by using: EPOCH

e_flux_s

Electron Flux, Spectrogram

This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: e_flux.

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Electron Flux Standard Deviation

Time series defined by using: EPOCH

e_flux_sd

Electron Flux Standard Deviation

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Electron Flux Standard Deviation, Spectrogram

Time series defined by using: EPOCH

e_flux_sd_s

Electron Flux Standard Deviation, Spectrogram

This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: e_flux_sd.

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Electron Flux Energy Channels, Y Axis Labels

Time series defined by using: EPOCH

e_flux_yaxis

Electron Flux Energy Channels, Y Axis Labels

PT1H

MeV

1.60218e-13>J

0.0

1.0e+31

-1.0e+31

Electron Flux Energy Channels

Time series defined by using: EPOCH

e_flux_energy

Electron Flux Energy Channels

PT1H

MeV

1.60218e-13>J

0.1

10.0

-1.0e+31

Helium Flux

Time series defined by using: EPOCH

He_flux

Helium Flux, 6 Bands: 2 MeV/n to 48 MeV/n

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Helium Flux

Time series defined by using: EPOCH

He_flux_s

Helium Flux, Spectrograms

This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: He_flux.

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Helium Flux Standard Deviation

Time series defined by using: EPOCH

He_flux_sd

Helium Flux Standard Deviation

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Helium Flux Standard Deviation

Time series defined by using: EPOCH

He_flux_sd_s

Helium Flux Standard Deviation, Spectrogram

This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: He_flux_sd.

PT1H

(m^2 s sr MeV/n)^-1

6.24161e18>(m^2 s sr J/n)^-1

0.0

1.0e+31

-1.0e+31

Helium Flux Energy Channels, Y Axis Labels

Time series defined by using: EPOCH

He_flux_yaxis

Helium Flux Energy Channels, Y Axis Labels

PT1H

MeV/n

1.60218e-13>J/n

0.0

1.0e+31

-1.0e+31

Helium Flux Energy Channels

Time series defined by using: EPOCH

He_flux_energy

Helium Flux Energy Channels

PT1H

MeV/n

1.60218e-13>J/n

1.0

100.0

-1.0e+31