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Product_Observational

Identification_Area
logical_identifier
urn:nasa:pds:vg2-crs-jup-avg-flux:data-pulse-height:fpha-rate
version_id
1.0
title
Voyager 2 Jupiter CRS Derived Pulse Height Ion Averaged Data - FPHA_RATE
information_model_version
1.13.0.0
product_class
Product_Observational
Citation_Information
author_list
Vogt, R. E.
publication_year
2021
description
This product contains pulse-height analyzed proton flux data from the Cosmic Ray instrument on Voyager 2 from the Jupiter encounter. The data contains 1 hour averages of the proton flux. Pulse-height Analyzed Proton Flux (FPHA) is derived from a [Delta]E vs. E analysis of pulses from L[1], L[2] and L[3] of LET and gives the average proton flux (cm**-2 sec**-1 sr**-1 MeV**-1) in six energy channels. Where required, a correction should be applied for the dead time in LD1 as follows: FPHA FPHA[t] = ------------------- 1 - 1.26x10**-4 FLD1 where FPHA is the listed flux of this rate (9) and FLD1 is the flux given in rate 1. FPHA gives the most accurate value of the proton flux available from this experiment; however, the counting statistics are poorer than for the other rates because of limited sampling. Fluxes derived from rate 3 (LD) which cover the same energy range as FPHA will be higher because of poorer definition of the energy threshold, accidental coincidences and a variable, but small, background contribution. ENERGY CHANNELS (MEV) OF FPHA (absolute accuracy about 10%) VOYAGER 1 VOYAGER 2 1 1.829 - 2.045 1.807 - 2.001 2 2.045 - 3.104 2.001 - 3.309 3 3.104 - 3.753 3.309 - 3.984 4 3.753 - 4.530 3.984 - 4.761 5 4.530 - 6.284 4.761 - 6.041 6 6.284 - 8.091 6.041 - 8.043 From the header data file: 07/03/79 00:00:00 to 08/03/79 23:00:00 A = 1.807E 00 - 2.001E 00 MeV PROTON FLUX B = 2.001E 00 - 3.309E 00 MeV PROTON FLUX C = 3.309E 00 - 3.984E 00 MeV PROTON FLUX D = 3.984E 00 - 4.761E 00 MeV PROTON FLUX E = 4.761E 00 - 6.486E 00 MeV PROTON FLUX
Modification_History
Modification_Detail
modification_date
2021-10-12
version_id
1.0
description
Original FPHA_RATE.TAB from the PDS3 VG2-J-CRS-5-SUMM-FLUX-V1.0 dataset, DATA directory, released 1997-12-01. The metadata were migrated to PDS4, the data are unchanged. This is the first version converted to PDS4.
Observation_Area
Time_Coordinates
start_date_time
1979-07-03T00:00:00.000Z
stop_date_time
1979-08-03T23:00:00.000Z
Primary_Result_Summary
purpose
Science
processing_level
Calibrated
Science_Facets
domain
Magnetosphere
discipline_name
Particles
facet1
Ions
facet2
Cosmic Ray
Investigation_Area
name
Voyager
type
Mission
Internal_Reference
lid_reference
urn:nasa:pds:context:investigation:mission.voyager
reference_type
data_to_investigation
Observing_System
Observing_System_Component
name
Voyager 2
type
Spacecraft
Internal_Reference
lid_reference
urn:nasa:pds:context:instrument_host:spacecraft.vg2
reference_type
is_instrument_host
Observing_System_Component
name
Cosmic Ray Subsystem
type
Instrument
Internal_Reference
lid_reference
urn:nasa:pds:context:instrument:vg2.crs
reference_type
is_instrument
Target_Identification
name
Jupiter
type
Planet
Internal_Reference
lid_reference
urn:nasa:pds:context:target:planet.jupiter
reference_type
data_to_target
Target_Identification
name
Ganymede
type
Satellite
Internal_Reference
lid_reference
urn:nasa:pds:context:target:satellite.jupiter.ganymede
reference_type
data_to_target
Mission_Area
Voyager2
mission_phase_name
Jupiter Encounter
spacecraft_clock_start_count
2/20451:22:011
spacecraft_clock_stop_count
2/21410:07:047
Discipline_Area
Particle_Observation
energy_range_minimum
1.807
energy_range_maximum
8.043
Particle_Parameter
particle_type
Ions
particle_measurement_type
Flux
ion_type
Proton
Reference_List
Internal_Reference
lid_reference
urn:nasa:pds:vg2-crs-jup-avg-flux:browse-pulse-height:fpha-rate
reference_type
data_to_browse
Source_Product_External
external_source_product_identifier
VG2-J-CRS-5-SUMM-FLUX-V1.0:FPHA_RATE.TAB
reference_type
data_to_calibrated_source_product
doi
10.17189/1519936
curating_facility
PDS Planetary Plasma Interactions Node
description
This is the first version converted to PDS4. The DOI provided references the PDS3 source data set.
File_Area_Observational
File
file_name
FPHA_RATE.TAB
creation_date_time
1996-10-01
file_size
114392
records
632
md5_checksum
655304ec0eb4ea7eab45a0bccb2651c9
comment
This file is unmodified from the PDS3 version.
Table_Character
offset
0
records
632
record_delimiter
Carriage-Return Line-Feed
Record_Character
fields
13
groups
0
record_length
181
Field_Character
name
Time
field_number
1
field_location
1
data_type
ASCII_Date_Time_YMD
field_length
23
description
Time column. This field contains time in PDS format yyyy-mm-ddThh:mm:ss.sss. The individual elements of the time field can be read using the format (i4,4(1x,i2),1x,f6.3) yr, mon, day, hr, min, sec.
Field_Character
name
Channel 1 Flux (1.807-2.001 MeV)
field_number
2
field_location
25
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains average Channel 1 particle flux.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Standard Deviation in Channel 1 Flux
field_number
3
field_location
38
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains the statistical error associated with the Channel 1.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Channel 2 Flux (2.001-3.309 MeV)
field_number
4
field_location
51
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains average Channel 2 particle flux.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Standard Deviation in Channel 2 Flux
field_number
5
field_location
64
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains the statistical error associated with the Channel 2.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Channel 3 Flux (3.309-3.984 MeV)
field_number
6
field_location
77
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains average Channel 3 particle flux.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Standard Deviation in Channel 3 Flux
field_number
7
field_location
90
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains the statistical error associated with the Channel 3.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Channel 4 Flux (3.984-4.761 MeV)
field_number
8
field_location
103
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains average Channel 4 particle flux.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Standard Deviation in Channel 4 Flux
field_number
9
field_location
116
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains the statistical error associated with the Channel 4.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Channel 5 Flux (4.761-6.041 MeV)
field_number
10
field_location
129
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains average Channel 5 particle flux.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Standard Deviation in Channel 5 Flux
field_number
11
field_location
142
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains the statistical error associated with the Channel 5.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Channel 6 Flux (6.041-8.043 MeV)
field_number
12
field_location
155
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains average Channel 6 particle flux.
Special_Constants
missing_constant
-9.99999e+10
Field_Character
name
Standard Deviation in Channel 6 Flux
field_number
13
field_location
168
data_type
ASCII_Real
field_length
12
unit
cm**-2 sec**-1 sr**-1 MeV**-1
description
Column contains the statistical error associated with the Channel 6.
Special_Constants
missing_constant
-9.99999e+10