This data set, from the Electrostatic Energy-Charge
Analyzer (EECA) part of the U. Maryland experiment on IMP 8, contains
count rate and pulse height data enabling the computation of 10.92-min
resolution fluxes of: singly ionized ions in 5 energy/charge windows of
lower limits between 130 and 740 keV/Q; doubly charged ions in the same
5 keV/Q windows plus another at 65 keV/Q; ions with charge states between
5 and 8 in the same 6 keV/Q windows as for doubly charged ions plus
another at 37 keV/Q; ions with charge states above about 10 at 37 and 65
keV/Q windows; 600-860 keV electrons. Some of the modes are spin
integrated while others are given in 90 deg quadrants about the spacecraft
spin vector (which is normal to the ecliptic plane). The data set was
created at NSSDC from the U.Md.-provided "summary tapes" (NSSDC IDs
SPHE-00170 and 73-078A-03C) by dropping engineering data, dropping data
from the ULET portion of the overall experiment (the ULET instrument
failed in 1978), and converting the remaining time, spacecraft position,
and EECA instrument data from binary to ASCII representation. The data
are available via ftp in 1- month files of variable lengths in the 3-6 MB
size range.
Version:2.2.9
This data set, from the Electrostatic Energy-Charge
Analyzer (EECA) part of the U. Maryland experiment on IMP 8, contains
count rate and pulse height data enabling the computation of 10.92-min
resolution fluxes of: singly ionized ions in 5 energy/charge windows of
lower limits between 130 and 740 keV/Q; doubly charged ions in the same
5 keV/Q windows plus another at 65 keV/Q; ions with charge states between
5 and 8 in the same 6 keV/Q windows as for doubly charged ions plus
another at 37 keV/Q; ions with charge states above about 10 at 37 and 65
keV/Q windows; 600-860 keV electrons. Some of the modes are spin
integrated while others are given in 90 deg quadrants about the spacecraft
spin vector (which is normal to the ecliptic plane). The data set was
created at NSSDC from the U.Md.-provided "summary tapes" (NSSDC IDs
SPHE-00170 and 73-078A-03C) by dropping engineering data, dropping data
from the ULET portion of the overall experiment (the ULET instrument
failed in 1978), and converting the remaining time, spacecraft position,
and EECA instrument data from binary to ASCII representation. The data
are available via ftp in 1- month files of variable lengths in the 3-6 MB
size range.
| Role | Person | StartDate | StopDate | Note | |
|---|---|---|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/George.Gloeckler | |||
| 2. | PrincipalInvestigator | spase://SMWG/Person/Fred.M.Ipavich |
See especially the instrument-team-generated
descriptive material on the experiment and data inside the Data Set
Catalog
monthly ASCII files via ftp
In CDF via HTTP from SPDF
This parameter contains five data words for each of
six charge state - energy/charge (or species - energy range) combinations.
The five words are (a) number of good readouts, (b) number of bad readouts,
(c) total spin-integrated counts, (d) sum of squares of readout-specific
counts, (e) accumulation times in seconds. Charge state - energy/charge
and species - energy range combinations are specified in the "elements"
below, where only the "counts" word is called out explicitly.
Array of the 5 words defined above for each of
the 6 charge state - energy/charge (or species - energy range)
combinations listed in the element names below.
This parameter contains nine data words for each of
nine charge state - energy/charge (or species - energy range) combinations.
The nine words are (a) number of good readouts, (b) number of bad readouts,
(c) total spin-integrated counts for all readouts and sectors, (d) sum of
squares of readout-specific, sector-specific counts, (e) accumulation time
per sector, in seconds, (f) total counts in 90-deg sector 1, (g ) total
counts in 90-deg sector 2, (h) total counts in 90-deg sector 3, (i) total
counts in 90-deg sector 4. Charge state - energy/charge combinations are
specified in the "elements" below, where only the "sector 1 counts" word
is called out explicitly.
Array of the 9 words defined above for each of
the 9 charge state - energy/charge combinations listed in the element
names below.
This parameter contains ten data words for each of
ten charge state - energy/charge combinations. (For each particle analyzed,
maximum of one per 1.28s, the spacecraft spin phase to the nearest 45 deg is
captured.) The ten words are (a) number of legal events, (b) number of
illegal events, (c through j) counts of events analyzed in sectors 0 through 7,
respectively. Charge state - energy/charge combinations are specified in the
"elements" below, where only the "sector 0 counts of events analyzed" word is
called out explicitly.
Array of the 10 words defined above for each of
the 10 charge state - energy/charge combinations listed in the element
names below.
This parameter contains 33 counts of events analyzed,
after pulse height analysis has enabled charge group separations for each
of the ten "event types" listed in the preceding parameter array; see the
names of the elements of that array for the event type labels (e.g., P1)
used below. Note that of the 33 event counts, only 20 correspond to
meaningful charge groups, while 13 correspond to background rates
that are labelled as BG-low (low discriminator channels) or BG-High
(high discriminator channels). Above-referenced documentation contains
a mapping of discriminator channels to charge groups and background effect,
for each of the 10 "event types." Spin phase information is not retained
in these 33 event counts.
List of 33 counts of events analyzed, by event type
and charge group
GSE X,Y,Z components of spacecraft position
vector, in km.
GSE X,Y,Z components of spacecraft position
vector, in km.