Data Description

This page summarizes information about the selected resource and its origin based on SPASE metadata.

Table of Contents

  1. Product
  2. Repository
  3. Instrument
  4. ObservatoryObservatories
  5. Persons

SPASE version 2.2.0

Numerical Data Product: Helios 1 E8 (Keppler) Hourly Particle Fluxes

Resource ID
spase://VEPO/NumericalData/Helios1/E8/PT1H Get XML
Name
Helios 1 E8 (Keppler) Hourly Particle Fluxes
Description

Data set records contain hourly count rates of protons and electrons in 16 energy ranges (protons: 15 differential channels between 21 and 677 keV, plus >677 keV; electrons: 15 differential channels between 17 and 835 keV, plus >835 keV), each in 16 22.5 deg azimuthal sectors. Accumulation times for each count rate are also given. No spacecraft position information is included. Data are from the E8 experiment on Helios 1.

Additional information
Data set catalog at SPDF
Readme file at SPDF
Acknowledgement

Please acknowledge the P.I., Erhard Keppler of Max Planck Institure, Lindau

Contact
Role Person
1. Principal investigator Dr. Erhard Keppler Get XML
Release date
2009-04-01 00:00:00
Repository
Name
SPDF Get XML
Availability
Online
Access rights
Open
URL
SPDF FTP area
SPDF HTTP area

In CDF via HTTP from SPDF

Format
Text
File size
229 MB
Acknowledgement

Please acknowledge the P.I., Erhard Keppler of MPI/Lindau and the Space Physics Data Facility at NASA/GSFC

Instrument
Energetic Electron and Proton Detector Get XML
Measurement type
Energetic particles
Temporal description
Start date
1974-12-10 00:00:00
Stop date
1980-12-31 00:00:00
Cadence
1 hour
Observed regions
Heliosphere.Inner

Parameters

Parameter #1

Name
Time tag
Description

The start times of the count rate averages, given as five words: hours since start of 1974, year, day of year, hour, minute. Values of the last one is uniformly zero.

Cadence
1 hour
Parameter type
Temporal

Parameter #2

Name
Electron count rates
Description

16-sectored count rates of electrons in 16 energy ranges (17-22, 22-28, 28-36, 36-46, 46-58, 58-74, 74-92, 93-120, 120-153, 153-201, 201-248, 248-298, 300-412, 412-525, 525-835, >835 keV).

Cadence
1 hour
Units
Particles/sec
Structure
Size
16 16
Description

Count rates of electrons in 16 energy ranges for each of 16 azimuthal sectors. Data cycle through energies for first sector, then repeats for second sector, etc.

Fill value
0.0
Particle type
Electron
Quantity
Count rate
Qualifier
Average
Energy range
Low energy
17
High energy
835
Units
keV

Parameter #3

Name
Accumulation times for electron count rates
Description

Accumulation times for each of the preceding 16x16 electron count rates.

Cadence
1 hour
Units
Sec
Structure
Size
16 16
Description

The accumulation time for a given count rate immediately follows its associated count rate in the data records.

Parameter type
Temporal

Parameter #4

Name
Proton count rates
Description

16-sectored count rates of electrons in 16 energy ranges (21-27, 27-35, 35-44, 44-56, 56-71, 71-90, 90-110, 110-137, 137-174, 174-222, 222-279, 279-353, 353-444, 444-563, 563-677, >677 keV).

Cadence
1 hour
Units
Particles/sec
Structure
Size
16 16
Description

Count rates of protonsons in 16 energy ranges for each of 16 azimuthal sectors. Data cycle through energies for first sector, then repeats for second sector, etc.

Fill value
0.0
Particle type
Proton
Quantity
Count rate
Qualifier
Average
Energy range
Low energy
21
High energy
677
Units
keV

Parameter #5

Name
Accumulation times for proton count rates
Description

Accumulation times for each of the preceding 16x16 proton count rates.

Cadence
1 hour
Units
Sec
Structure
Size
16 16
Description

The accumulation time for a given count rate immediately follows its associated count rate in the data records.

Parameter type
Temporal

SPASE version 2.0.0

Instrument: Energetic Electron and Proton Detector

Instrument ID
spase://SMWG/Instrument/Helios1/E8 Get XML
Name
Energetic Electron and Proton Detector
Description

The objective of the experiment (E8) was to study the origin and the distribution mechanism of low-energy electrons and protons. The instrument, a magnetic spectrometer, consisted of six semiconductor detectors with the field of view in the plane of the ecliptic. Species separation was achieved by an inhomogeneous magnetic field oriented perpendicular to the particle path. Four electron and two proton detectors measured electrons from 17 to 835 keV and protons from 21 to 677 keV. The proton measurements were made with a two-detector telescope employing coincidence and anticoincidence logic. Both particle species were measured in 16 energy channels through pulse-height analysis. For further information see pp. 261-263 of Raumfahrtforschung, v. 19, n. 5, 1975.

Additional information
NSSDC Data Set Catalog

The NSSDC Data Set Catalog contains within itself a PI-generated detailed description of the experiment and data handling.

Contact
Role Person
1. Principal investigator Dr. Erhard Keppler Get XML
Release date
2009-05-20 21:10:02
Instrument type
Energetic Particle Instrument
Investigation name
Energetic Electron and Proton Detector on Helios-A
Observatory
Helios 1 Get XML

SPASE version 2.2.0

Observatory: Helios 1

Observatory ID
spase://SMWG/Observatory/Helios1 Get XML
Name
Helios 1
Alternate name
Helios-A
Description

This spacecraft was one of a pair of deep space probes developed by the Federal Republic of Germany (FRG) in a cooperative program with NASA. Experiments were provided by scientists from both FRG and the U.S. NASA supplied the Titan/Centaur launch vehicle. The spacecraft was equipped with two booms and a 32-m electric dipole. The payload consisted of a fluxgate magnetometer; electric and magnetic wave experiments, which covered various bands in the frequency range 6 Hz to 3 MHz; charged-particle experiments, which covered various energy ranges starting with solar wind thermal energies and extending to 1 GeV; a zodiacal-light experiment; and a micrometeoroid experiment. The purpose of the mission was to make pioneering measurements of the interplanetary medium from the vicinity of the earth's orbit to 0.3 AU. The spin axis was normal to the ecliptic, and the nominal spin rate was 1 rps. The outer spacecraft surface was dielectric, effectively (because of the sheath potential) raising the low-energy threshold for the solar wind plasma experiment to as high as 100 eV. Also, sheath-related coupling caused by the spacecraft antennae produced interference with the wave experiments. The spacecraft was capable of being operated at bit rates from 4096 to 8 bps, variable by factors of 2. While the spacecraft was moving to perihelion, it was generally operated from 64 to 256 bps; and near 0.3 AU, it was operated at the highest bit rate. Because of a deployment failure of one axis of the 32-m, tip-to-tip, dipole antenna, one axis was shorted, causing the antenna to function as a monopole. The major effect of this anomaly was to increase the effective instrument thresholds, and to introduce additional uncertainties in the effective antenna length. Instrument descriptions written by the experimenters were published (some in German, some in English) in Raumfahrtforschung, v. 19, n. 5, 1975.

Additional information
NSSDC's Master Catalog

Information about the Helios-A mission

Contact
Role Person
1. Project scientist Dr. James H. Trainor Get XML
2. Project scientist Dr. Herbert Porsche Get XML
Release date
2010-10-01 20:45:03
Prior ID
spase://vspo/observatory/43
Observatory group
Helios Mission Get XML
Location
Region
Heliosphere.Inner

SPASE version 2.2.0

Observatory: Helios Mission

Observatory ID
spase://SMWG/Observatory/Helios Get XML
Name
Helios Mission
Description

A pair of deep space probes developed by the Federal Republic of Germany (FRG) in a cooperative program with NASA. Experiments were provided by scientists from both FRG and the U.S. NASA supplied the Titan/Centaur launch vehicle.

Contact
Role Person
1. Project scientist Dr. James H. Trainor Get XML
2. Project scientist Dr. Herbert Porsche Get XML
Release date
2010-10-01 20:44:34
Location
Region
Heliosphere.Inner

SPASE version 2.2.0

Person: Dr. Erhard Keppler

Name
Dr. Erhard Keppler
Organization
Max-Planck-Institut fur Aeronomie
Email
keppler@linmpi.mpe.de
Person ID
spase://SMWG/Person/Erhard.Keppler Get XML

SPASE version 2.2.0

Person: Ms. Tamara J. Kovalick

Name
Ms. Tamara J. Kovalick
Organization
GSFC-Code 672
Email
Tamara.J.Kovalick@nasa.gov
Phone
+1-301-286-9422
Person ID
spase://SMWG/Person/Tamara.J.Kovalick Get XML
Release date
2010-08-05 17:35:47

SPASE version 2.2.0

Person: Mr. Robert M. Candey

Name
Mr. Robert M. Candey
Organization
NASA Goddard Space Flight Center
Address
Code 672, Greenbelt, MD 20771, USA
Email
robert.m.candey@nasa.gov
Phone
1-301-286-6707
Person ID
spase://SMWG/Person/Robert.M.Candey Get XML
Release date
2010-08-05 17:35:47

SPASE version 2.2.0

Person: Dr. Robert E. McGuire

Name
Dr. Robert E. McGuire
Organization
NASA Goddard Space Flight Center
Address
Code 672, Greenbelt, MD 20771, USA
Email
mcguire@mail630.gsfc.nasa.gov
Phone
+1 301 286 7794
Person ID
spase://SMWG/Person/Robert.E.McGuire Get XML
Release date
2010-08-05 17:35:47

SPASE version 2.2.0

Person: Dr. James H. Trainor

Name
Dr. James H. Trainor
Organization
Deceased - formerly at GSFC
Person ID
spase://SMWG/Person/James.H.Trainor Get XML
Release date
2010-08-05 17:35:46

SPASE version 2.2.0

Person: Dr. Herbert Porsche

Name
Dr. Herbert Porsche
Organization
DLR
Phone
+1-49-8153-28-505
Person ID
spase://SMWG/Person/Herbert.Porsche Get XML
Release date
2010-08-05 17:35:46

SPASE version 1.3.0

Repository: SPDF

Repository ID
spase://SMWG/Repository/NASA/GSFC/SPDF Get XML
Name
SPDF
Description

Space Physics Data Facility

Additional information
SPDF

Space Physics Data Facility

Contact
Role Person
1. General contact Ms. Tamara J. Kovalick Get XML
2. Technical contact Mr. Robert M. Candey Get XML
3. Project scientist Dr. Robert E. McGuire Get XML
Release date
2008-08-26 21:02:30
Prior IDs
spase://vspo/repository/61
spase://SMWG/Repository/SPDF
Access URL