Data Description

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SPASE version 2.2.2

Numerical Data Product: STEREO-B IMPACT/LET 1-min Level 1 Ion Fluxes

Resource ID
spase://VEPO/NumericalData/STEREO-B/IMPACT/LET/L1/PT1M Get XML
Name
STEREO-B IMPACT/LET 1-min Level 1 Ion Fluxes
Description

The IMPACT Low Energy Telescope (LET) data consist of 1-min resolution unsectored fluxes and counts for each of 15 single-Z ionic species at each of a species-dependent number of energy bins ranging between 9 and 16, plus 16-sectored fluxes and counts for 5 ionic species or Z groups in one (H) or two (He4, CNO, NiMgSi, Fe) energy ranges. There is much fill data. (

Additional information
CDAWeb Skeleton Table
Caltech STEREO site
Acknowledgement

Please acknowledge the IMPACT P.I., Janet Luhmann of UCB

Contact
Role Person
1. Principal investigator Dr. Janet G. Luhmann Get XML
Release date
2010-08-12 00:00:00
Repository
Name
SPDF Get XML
Availability
Online
Access rights
Open
URL
CDAWeb

With subset, plot and ASCII list functions from CDAWeb

FTP access to files at SPDF
HTTP access to files at SPDF

In CDF via HTTP from SPDF

Format
CDF
File size
7947 kB per 1 day
Acknowledgement

Please acknowledge the P.I., Janet Luhmann of UCB, and CDAWeb at GSFC/SPDF

Instrument
STEREO-B IMPACT Low Energy Telescope Get XML
Measurement type
Energetic particles
Temporal description
Start date
2006-11-14 00:00:00
Relative stop date
2 months ago
Cadence
1 minute
Observed regions
Heliosphere.Remote1AU

Parameters

Parameter #1

Name
Proton unsectored fluxes
Parameter key
H_unsec_flux
Description

Unsectored proton flux in each of 12 energy bands ranging from 1.8-2.2 MeV to 12-15 MeV, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
12
Description

Set of 12 proton fluxes

Fill value
-1.0e+31
Particle type
Proton
Quantity
Number flux
AtomicNumber
1
Energy range
Low energy
1.8
High energy
15
Units
MeV/n

Parameter #2

Name
He3 ion unsectored fluxes
Parameter key
He3_unsec_flux
Description

unsectored He3 ion flux in each of 11 energy bands ranging from 2.2-2.7 MeV to 12-15 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
11
Description

Set of 11 He3 fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
2
Energy range
Low energy
2.2
High energy
15
Units
MeV/n

Parameter #3

Name
He4 ion unsectored fluxes
Parameter key
He4_unsec_flux
Description

unsectored He4 ion (alpha particle) flux in each of 12 energy bands ranging from 1.8-2.2 MeV to 12-15 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
12
Description

Set of 12 He4 fluxes

Fill value
-1.0e+31
Particle type
AlphaParticle
Quantity
Number flux
AtomicNumber
2
Energy range
Low energy
1.8
High energy
15
Units
MeV/n

Parameter #4

Name
Carbon ion unsectored fluxes
Parameter key
C_unsec_flux
Description

unsectored carbon ion flux in each of 12 energy bands ranging from 3.2-3.6 MeV/n to 27-33 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
12
Description

Set of 12 carbon ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
6
Energy range
Low energy
3.2
High energy
33
Units
MeV/n

Parameter #5

Name
Nitrogen ion unsectored fluxes
Parameter key
N_unsec_flux
Description

unsectored nitrogen ion flux in each of 12 energy bands ranging from 3.2-3.6 MeV/n to 27-33 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
12
Description

Set of 12 nitrogen ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
7
Energy range
Low energy
3.2
High energy
33
Units
MeV/n

Parameter #6

Name
Oxygen ion unsectored fluxes
Parameter key
O_unsec_flux
Description

unsectored oxygen ion flux in each of 12 energy bands ranging from 3.2-3.6 MeV/n to 27-33 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
12
Description

Set of 12 oxygen ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
8
Energy range
Low energy
3.2
High energy
33
Units
MeV/n

Parameter #7

Name
Neon ion unsectored fluxes
Parameter key
Ne_unsec_flux
Description

unsectored neon ion flux in each of 13 energy bands ranging from 3.2-3.6 MeV/n to 33-40 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
13
Description

Set of 13 neon ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
10
Energy range
Low energy
3.2
High energy
40
Units
MeV/n

Parameter #8

Name
Sodium ion unsectored fluxes
Parameter key
Na_unsec_flux
Description

unsectored sodium ion flux in each of 8 energy bands ranging from 6-8 MeV/n to 33-40 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
8
Description

Set of 8 sodium ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
11
Energy range
Low energy
6
High energy
40
Units
MeV/n

Parameter #9

Name
Magnesium ion unsectored fluxes
Parameter key
Mg_unsec_flux
Description

unsectored magnesium ion flux in each of 14 energy bands ranging from 3.2-3.6 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
14
Description

Set of 14 magnesium ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
12
Energy range
Low energy
3.2
High energy
52
Units
MeV/n

Parameter #10

Name
Aluminium ion unsectored fluxes
Parameter key
Al_unsec_flux
Description

unsectored aluminium ion flux in each of 9 energy bands ranging from 6-8 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
9
Description

Set of 9 aluminium ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
13
Energy range
Low energy
6
High energy
52
Units
MeV/n

Parameter #11

Name
Silicon ion unsectored fluxes
Parameter key
Si_unsec_flux
Description

unsectored silicon ion flux in each of 14 energy bands ranging from 3.2-3.6 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
14
Description

Set of 14 silicon ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
14
Energy range
Low energy
3.2
High energy
52
Units
MeV/n

Parameter #12

Name
Sulfur ion unsectored fluxes
Parameter key
S_unsec_flux
Description

unsectored sulfur ion flux in each of 13 energy bands ranging from 3.6-4 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
13
Description

Set of 13 sulfur ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
16
Energy range
Low energy
3.6
High energy
52
Units
MeV/n

Parameter #13

Name
Argon ion unsectored fluxes
Parameter key
Ar_unsec_flux
Description

unsectored argon ion flux in each of 13 energy bands ranging from 3.6-4 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
13
Description

Set of 13 argon ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
18
Energy range
Low energy
3.6
High energy
52
Units
MeV/n

Parameter #14

Name
Calcium ion unsectored fluxes
Parameter key
Ca_unsec_flux
Description

unsectored calcium ion flux in each of 13 energy bands ranging from 3.6-4 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
13
Description

Set of 13 calcium ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
20
Energy range
Low energy
3.6
High energy
52
Units
MeV/n

Parameter #15

Name
Iron ion unsectored fluxes
Parameter key
Fe_unsec_flux
Description

unsectored iron ion flux in each of 16 energy bands ranging from 2.7-3.2 MeV/n to 52-70 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
16
Description

Set of 16 iron ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
26
Energy range
Low energy
2.7
High energy
70
Units
MeV/n

Parameter #16

Name
Nickel ion unsectored fluxes
Parameter key
Ni_unsec_flux
Description

unsectored nickel ion flux in each of 9 energy bands ranging from 8-10 MeV/n to 52-70 MeV/n, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV/n)
Structure
Size
9
Description

Set of 9 nickel ion fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
28
Energy range
Low energy
8
High energy
70
Units
MeV/n

Parameter #17

Name
Proton unsectored counts
Parameter key
H_unsec_cnts
Description

unsectored proton counts in each of 12 energy bands ranging from 1.8-2.2 MeV to 12-15 MeV, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
12
Description

Set of 12 proton counts

Fill value
-1.0e+31
Particle type
Proton
Quantity
Counts
AtomicNumber
1
Energy range
Low energy
1.8
High energy
15
Units
MeV/n

Parameter #18

Name
He3 ion unsectored counts
Parameter key
He3_unsec_cnts
Description

unsectored He3 ion counts in each of 11 energy bands ranging from 2.2-2.7 MeV to 12-15 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
11
Description

Set of 11 He3 counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
2
Energy range
Low energy
2.2
High energy
15
Units
MeV/n

Parameter #19

Name
He4 ion unsectored counts
Parameter key
He4_unsec_cnts
Description

unsectored He4 ion (alpha particle) counts in each of 12 energy bands ranging from 1.8-2.2 MeV to 12-15 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
12
Description

Set of 12 He4 counts

Fill value
-1.0e+31
Particle type
AlphaParticle
Quantity
Counts
AtomicNumber
2
Energy range
Low energy
1.8
High energy
15
Units
MeV/n

Parameter #20

Name
Carbon ion unsectored counts
Parameter key
C_unsec_cnts
Description

unsectored carbon ion counts in each of 12 energy bands ranging from 3.2-3.6 MeV/n to 27-33 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
12
Description

Set of 12 carbon ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
6
Energy range
Low energy
3.2
High energy
33
Units
MeV/n

Parameter #21

Name
Nitrogen ion unsectored counts
Parameter key
N_unsec_cnts
Description

unsectored nitrogen ion counts in each of 12 energy bands ranging from 3.2-3.6 MeV/n to 27-33 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
12
Description

Set of 12 nitrogen ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
7
Energy range
Low energy
3.2
High energy
33
Units
MeV/n

Parameter #22

Name
Oxygen ion unsectored counts
Parameter key
O_unsec_cnts
Description

unsectored oxygen ion counts in each of 12 energy bands ranging from 3.2-3.6 MeV/n to 27-33 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
12
Description

Set of 12 oxygen ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
8
Energy range
Low energy
3.2
High energy
33
Units
MeV/n

Parameter #23

Name
Neon ion unsectored counts
Parameter key
Ne_unsec_cnts
Description

unsectored neon ion counts in each of 13 energy bands ranging from 3.2-3.6 MeV/n to 33-40 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
13
Description

Set of 13 neon ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
10
Energy range
Low energy
3.2
High energy
40
Units
MeV/n

Parameter #24

Name
Sodium ion unsectored counts
Parameter key
Na_unsec_cnts
Description

unsectored sodium ion counts in each of 8 energy bands ranging from 6-8 MeV/n to 33-40 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
8
Description

Set of 8 sodium ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
11
Energy range
Low energy
6
High energy
40
Units
MeV/n

Parameter #25

Name
Magnesium ion unsectored counts
Parameter key
Mg_unsec_cnts
Description

unsectored magnesium ion counts in each of 14 energy bands ranging from 3.2-3.6 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
14
Description

Set of 14 magnesium ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
12
Energy range
Low energy
3.2
High energy
52
Units
MeV/n

Parameter #26

Name
Aluminium ion unsectored counts
Parameter key
Al_unsec_cnts
Description

unsectored aluminium ion counts in each of 9 energy bands ranging from 6-8 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
9
Description

Set of 9 aluminium ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
13
Energy range
Low energy
6
High energy
52
Units
MeV/n

Parameter #27

Name
Silicon ion unsectored counts
Parameter key
Si_unsec_cnts
Description

unsectored silicon ion counts in each of 14 energy bands ranging from 3.2-3.6 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
14
Description

Set of 14 silicon ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
14
Energy range
Low energy
3.2
High energy
52
Units
MeV/n

Parameter #28

Name
Sulfur ion unsectored counts
Parameter key
S_unsec_cnts
Description

unsectored sulfur ion counts in each of 13 energy bands ranging from 3.6-4 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
13
Description

Set of 13 sulfur ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
16
Energy range
Low energy
3.6
High energy
52
Units
MeV/n

Parameter #29

Name
Argon ion unsectored counts
Parameter key
Ar_unsec_cnts
Description

unsectored argon ion counts in each of 13 energy bands ranging from 3.6-4 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
13
Description

Set of 13 argon ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
18
Energy range
Low energy
3.6
High energy
52
Units
MeV/n

Parameter #30

Name
Calcium ion unsectored counts
Parameter key
Ca_unsec_cnts
Description

unsectored calcium ion counts in each of 13 energy bands ranging from 3.6-4 MeV/n to 40-52 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
13
Description

Set of 13 calcium ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
20
Energy range
Low energy
3.6
High energy
52
Units
MeV/n

Parameter #31

Name
Iron ion unsectored counts
Parameter key
Fe_unsec_cnts
Description

unsectored iron ion counts in each of 16 energy bands ranging from 2.7-3.2 MeV/n to 52-70 MeV/n, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
16
Description

Set of 16 iron ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
26
Energy range
Low energy
2.7
High energy
70
Units
MeV/n

Parameter #32

Name
Nickel ion unsectored counts
Parameter key
Ni_unsec_cnts
Description

unsectored nickel ion counts in each of 9 energy bands ranging from 8-10 MeV/n to 52-70 MeV/n, at 1-min resolution

Cadence
1 minute
Units
Counts
Structure
Size
9
Description

Set of 9 nickel ion counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
28
Energy range
Low energy
8
High energy
70
Units
MeV/n

Parameter #33

Name
Sectored 4-6 MeV proton fluxes
Parameter key
H_Lo_sec_flux
Description

Flux of 4-6 MeV protons in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
16
Description

Set of 16 proton fluxes

Fill value
-1.0e+31
Particle type
Proton
Quantity
Number flux
AtomicNumber
1
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #34

Name
Sectored 4-6 MeV/n He4 fluxes
Parameter key
He4_Lo_sec_flux
Description

Flux of 4-6 MeV/n He4 ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
16
Description

Set of 16 He4 fluxes

Fill value
-1.0e+31
Particle type
AlphaParticle
Quantity
Number flux
AtomicNumber
2
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #35

Name
Sectored 6-12 MeV/n He4 fluxes
Parameter key
He4_Hi_sec_flux
Description

Flux of 6-12 MeV/n He4 ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
16
Description

Set of 16 He4 fluxes

Fill value
-1.0e+31
Particle type
AlphaParticle
Quantity
Number flux
AtomicNumber
2
Energy range
Low energy
6
High energy
12
Units
MeV/n

Parameter #36

Name
Sectored 4-6 MeV/n CNO fluxes
Parameter key
CNO_Lo_sec_flux
Description

Flux of 4-6 MeV/n CNO ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
16
Description

Set of 16 CNO fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
6
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #37

Name
Sectored 6-12 MeV/n CNO fluxes
Parameter key
CNO_Hi_sec_flux
Description

Flux of 6-12 MeV/n CNO ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
16
Description

Set of 16 CNO fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
6
Energy range
Low energy
6
High energy
12
Units
MeV/n

Parameter #38

Name
Sectored 4-6 MeV/n NeMgSi fluxes
Parameter key
NeMgSi_Lo_sec_flux
Description

Flux of 4-6 MeV/n NeMgSi ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
16
Description

Set of 16 NeMgSi fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
10
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #39

Name
Sectored 6-12 MeV/n NeMgSi fluxes
Parameter key
NeMgSi_Hi_sec_flux
Description

Flux of 6-12 MeV/n NeMgSi ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
16
Description

Set of 16 NeMgSi fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
10
Energy range
Low energy
6
High energy
12
Units
MeV/n

Parameter #40

Name
Sectored 4-6 MeV/n Iron fluxes
Parameter key
Fe_Lo_sec_flux
Description

Flux of 4-6 MeV/n iron ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
16
Description

Set of 16 iron fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
26
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #41

Name
Sectored 6-12 MeV/n Iron fluxes
Parameter key
Fe_Hi_sec_flux
Description

Flux of 6-12 MeV/n iron ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
1/(sec sr cm^2 MeV)
Structure
Size
16
Description

Set of 16 iron fluxes

Fill value
-1.0e+31
Particle type
Ion
Quantity
Number flux
AtomicNumber
26
Energy range
Low energy
6
High energy
12
Units
MeV/n

Parameter #42

Name
Sectored 4-6 MeV proton counts
Parameter key
H_Lo_sec_cnts
Description

Counts of 4-6 MeV protons in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
16
Description

Set of 16 proton counts

Fill value
-1.0e+31
Particle type
Proton
Quantity
Counts
AtomicNumber
1
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #43

Name
Sectored 4-6 MeV/n He4 counts
Parameter key
He4_Lo_sec_cnts
Description

Counts of 4-6 MeV/n He4 ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
16
Description

Set of 16 He4 counts

Fill value
-1.0e+31
Particle type
AlphaParticle
Quantity
Counts
AtomicNumber
2
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #44

Name
Sectored 6-12 MeV/n He4 counts
Parameter key
He4_Hi_sec_cnts
Description

Counts of 6-12 MeV/n He4 ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
16
Description

Set of 16 He4 counts

Fill value
-1.0e+31
Particle type
AlphaParticle
Quantity
Counts
AtomicNumber
2
Energy range
Low energy
6
High energy
12
Units
MeV/n

Parameter #45

Name
Sectored 4-6 MeV/n CNO counts
Parameter key
CNO_Lo_sec_cnts
Description

Counts of 4-6 MeV/n CNO ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
Counts
Structure
Size
16
Description

Set of 16 CNO counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
6
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #46

Name
Sectored 6-12 MeV/n CNO counts
Parameter key
CNO_Hi_sec_cnts
Description

Counts of 6-12 MeV/n CNO ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
16
Description

Set of 16 CNO counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
6
Energy range
Low energy
6
High energy
12
Units
MeV/n

Parameter #47

Name
Sectored 4-6 MeV/n NeMgSi counts
Parameter key
NeMgSi_Lo_sec_cnts
Description

Counts of 4-6 MeV/n NeMgSi ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
16
Description

Set of 16 NeMgSi counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
10
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #48

Name
Sectored 6-12 MeV/n NeMgSi counts
Parameter key
NeMgSi_Hi_sec_cnts
Description

Counts of 6-12 MeV/n NeMgSi ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
16
Description

Set of 16 NeMgSi counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
10
Energy range
Low energy
6
High energy
12
Units
MeV/n

Parameter #49

Name
Sectored 4-6 MeV/n iron counts
Parameter key
Fe_Lo_sec_cnts
Description

Counts of 4-6 MeV/n iron ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
16
Description

Set of 16 iron counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
26
Energy range
Low energy
4
High energy
6
Units
MeV/n

Parameter #50

Name
Sectored 6-12 MeV/n iron counts
Parameter key
Fe_Hi_sec_cnts
Description

Counts of 6-12 MeV/n iron ions in each of 16 22.5deg angular bins, at 1-min resolution

Cadence
1 minute
Units
counts
Structure
Size
16
Description

Set of 16 iron counts

Fill value
-1.0e+31
Particle type
Ion
Quantity
Counts
AtomicNumber
26
Energy range
Low energy
6
High energy
12
Units
MeV/n

SPASE version 2.0.3

Instrument: STEREO-B IMPACT Low Energy Telescope

Instrument ID
spase://SMWG/Instrument/STEREO-B/IMPACT/LET Get XML
Name
STEREO-B IMPACT Low Energy Telescope
Alternate name
STEREO-B IMPACT LET
Description

The Low Energy Telescope (LET) is one of four sensors that make up the Solar Energetic Particle (SEP) instrument of the IMPACT investigation for NASA's STEREO mission. LET is a special double-fan arrangement of 14 solid state detectors designed to measure the elemental composition, energy spectra, angular distributions, and arrival times of H to Ni ions from ~3 to 30 MeV/nucleon. It will also identify the rare isotope 3He and trans-iron nuclei with 30 ≤ Z ≤ 83.

The SEP measurements from the two STEREO spacecraft will be combined with data from ACE and other 1-AU spacecraft to provide multipoint investigations of the energetic particles that result from interplanetary shocks driven by coronal mass ejections (CMEs) and from solar flare events. The multipoint in situ observations of SEPs and solar-wind plasma will complement STEREO images of CMEs in order to investigate their role in space weather.

LET uses a standard dE/dx vs. E technique, identifying particles that stop at depths of ~20-70 microns and ~70-2000 microns corresponding to two general energy ranges. The large field of view spans from 20 deg above to 20 deg below the ecliptic plane, and extends 65 deg to either side of the forward and backward Parker Spiral field directions in the ecliptic plane. LET's large geometric factor also ensures the detection of even small SEP events.

Each LET instrument includes a sensor system made up of an array of 14 solid-state detectors composed of 54 segments that are individually analyzed by custom Pulse Height Analysis System Integrated Circuits (PHASIC). The signals from four PHASIC chips in each LET are used by a Minimal Instruction Set Computer (MISC) to provide on-board particle identification of a dozen species in ~12 energy intervals at event rates of ~1000 events/sec. An additional control unit, called SEP Central, gathers data from the four SEP sensors, controls the SEP bias supply, and manages the interfaces to the sensors and the SEP interface to the IMPACT Data Processing Unit (IDPU).

The LET design, calibration and operation is described in detail by Mewaldt et al. in Space Science Reviews 136, 285-362 (2008).

Additional information
STEREO/IMPACT Mission Site
NSSDC's Master Catalog

In-Situ Measurements of Particles and CME Transients (IMPACT) experiment on the STEREO B mission.

Acknowledgement

The STEREO IMPACT/LET Team

Contact
Role Person
1. Principal investigator Dr. Janet G. Luhmann Get XML
2. CoInvestigator Dr. Mark E. Wiedenbeck Get XML
3. CoInvestigator Dr. Alan C. Cummings Get XML
4. CoInvestigator Branislav Kecman Get XML
5. CoInvestigator Dr. Richard Leske Get XML
6. CoInvestigator Dr. Richard A. Mewaldt Get XML
7. CoInvestigator Prof. Edward C. Stone, Jr. Get XML
Release date
2010-03-18 14:37:51
Instrument type
Particle Detector
Investigation name
In-Situ Measurements of Particles and CME Transients (IMPACT) Low Energy Telescope on STEREO B
Observatory
STEREO B Get XML

SPASE version 2.2.0

Observatory: STEREO B

Observatory ID
spase://SMWG/Observatory/STEREO-B Get XML
Name
STEREO B
Alternate name
STEREO Behind
STEREO West
Solar Terrestrial Relations Observatory B
Description

The Solar-Terrestrial Relations Observatory (STEREO) mission includes two spacecraft respectively lagging (STEREO A) and leading (STEREO B) the Earth in heliocentric orbit around the Sun for remote 3-D imaging and radio observations of coronal mass ejections (CMEs). These events are responsible for large solar energetic particle events in interplanetary space and are the primary cause of major geomagnetic storms at Earth. The two spacecraft are launched to drift slowly away from the Earth in opposite directions at about 10 degrees per year for the lagging spacecraft and 20 degrees per year for the leading one. Optimal longitudinal separation of about sixty degrees is achieved after two years. Afterwards the separation gradually increases beyond the design lifetime of two years with the possibility of extended mission observations at larger angles. Science instruments selected for STEREO include the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) for extreme ultraviolet (EUV), white-light coronographic, and heliospheric imaging, the STEREO/WAVES (SWAVES) interplanetary radio burst tracker, the In situ Measurements of Particles and CME Transients (IMPACT) investigation for in-situ sampling the 3-D distribution and plasma characteristics of solar energetic particles and the interplanetary magnetic field, and the PLAsma and SupraThermal Ion and Composition (PLASTIC) experiment to measure elemental and charge composition of ambient and CME plasma ions. STEREO data recorded and stored onboard each spacecraft will be downlinked through the NASA Deep Space Network on a daily schedule. Real-time space weather data will be continuously transmitted through a separate beacon system to NASA and non-NASA receiving stations.

Additional information
STEREO Project Page

Project home page

NSSDC's Master Catalog

Information about the STEREO B mission

Contact
Role Person
1. Project scientist Mr. Michael L. Kaiser Get XML
Release date
2010-09-25 03:09:48
Prior ID
spase://vspo/observatory/140
Observatory group
STEREO Mission Get XML
Location
Region
Heliosphere.Remote1AU

SPASE version 2.2.0

Observatory: STEREO Mission

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

The Solar-Terrestrial Relations Observatory (STEREO) mission includes two spacecraft respectively lagging (STEREO A) and leading (STEREO B) the Earth in heliocentric orbit around the Sun for remote 3-D imaging and radio observations of coronal mass ejections (CMEs). These events are responsible for large solar energetic particle events in interplanetary space and are the primary cause of major geomagnetic storms at Earth. The two spacecraft are launched to drift slowly away from the Earth in opposite directions at about 10 degrees per year for the lagging spacecraft and 20 degrees per year for the leading one. Optimal longitudinal separation of about sixty degrees is achieved after two years. Afterwards the separation gradually increases beyond the design lifetime of two years with the possibility of extended mission observations at larger angles. Science instruments selected for STEREO include the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) for extreme ultraviolet (EUV), white-light coronographic, and heliospheric imaging, the STEREO/WAVES (SWAVES) interplanetary radio burst tracker, the In situ Measurements of Particles and CME Transients (IMPACT) investigation for in-situ sampling the 3-D distribution and plasma characteristics of solar energetic particles and the interplanetary magnetic field, and the PLAsma and SupraThermal Ion and Composition (PLASTIC) experiment to measure elemental and charge composition of ambient and CME plasma ions. STEREO data recorded and stored onboard each spacecraft will be downlinked through the NASA Deep Space Network on a daily schedule. Real-time space weather data will be continuously transmitted through a separate beacon system to NASA and non-NASA receiving stations.

Additional information
STEREO Project Page

Project home page

Contact
Role Person
1. Project scientist Mr. Michael L. Kaiser Get XML
Release date
2009-05-20 20:00:12
Location
Region
Heliosphere.Remote1AU

SPASE version 2.2.0

Person: Dr. Janet G. Luhmann

Name
Dr. Janet G. Luhmann
Organization
University of California, Berkeley
Person ID
spase://SMWG/Person/Janet.G.Luhmann 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. Mark E. Wiedenbeck

Name
Dr. Mark E. Wiedenbeck
Organization
Jet Propulsion Laboratory
Person ID
spase://SMWG/Person/Mark.E.Wiedenbeck Get XML

SPASE version 2.2.0

Person: Dr. Alan C. Cummings

Name
Dr. Alan C. Cummings
Organization
California Institute of Technology
Person ID
spase://SMWG/Person/Alan.C.Cummings Get XML

SPASE version 2.2.0

Person: Branislav Kecman

Name
Branislav Kecman
Organization
California Institute of Technology
Email
kecman@srl.caltech.edu
Person ID
spase://SMWG/Person/Branislav.Kecman Get XML
Release date
2010-08-05 17:35:46

SPASE version 2.2.0

Person: Dr. Richard Leske

Name
Dr. Richard Leske
Organization
California Institute of Technology
Email
ral@srl.caltech.edu
Person ID
spase://SMWG/Person/Richard.Leske Get XML
Release date
2010-08-05 17:35:47

SPASE version 2.2.0

Person: Dr. Richard A. Mewaldt

Name
Dr. Richard A. Mewaldt
Organization
California Institute of Technology
Person ID
spase://SMWG/Person/Richard.A.Mewaldt Get XML

SPASE version 2.2.0

Person: Prof. Edward C. Stone, Jr.

Name
Prof. Edward C. Stone, Jr.
Organization
California Institute of Technology
Email
ecs@srl.caltech.edu
Phone
+1 626 395 8321
Person ID
spase://SMWG/Person/Edward.C.Stone.Jr Get XML
Release date
2010-08-05 17:35:46

SPASE version 2.2.0

Person: Mr. Michael L. Kaiser

Name
Mr. Michael L. Kaiser
Organization
GSFC-Code 695
Person ID
spase://SMWG/Person/Michael.L.Kaiser Get XML

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