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ICON The Far Ultra Violet Imaging Spectrograph Nightside Images

(2023). ICON The Far Ultra Violet Imaging Spectrograph Nightside Images [Data set]. NASA Space Physics Data Facility. https://doi.org/10.48322/4vx2-1c67. Accessed on .

Note: Proper references, including those in BibTex or other formats, should include the "Accessed on date" as shown above to identify the version of the resource being cited in a given publication.

ResourceID
spase://NASA/NumericalData/ICON/FUV/L2/Night/PT12S

Description

The FUV instrument takes 2D images of the Earth’s horizon in the Far ultraviolet. The imager is pointing approximately 90 degrees to the spacecraft motion, similar to looking out of the side window of a car as it drives down the road. Onboard electronics read the image 8 times per second and perform Time Delay Integration (TDI) to remove the motion-blur from the images. A turret is used to steer the field of view of the instrument left to right to ensure it always looks along the magnetic meridian (towards the magnetic pole).

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Details

Version:2.6.0

NumericalData

ResourceID
spase://NASA/NumericalData/ICON/FUV/L2/Night/PT12S
ResourceHeader
ResourceName
ICON The Far Ultra Violet Imaging Spectrograph Nightside Images
AlternateName
FUV Nightside Images
DOI
https://doi.org/10.48322/4vx2-1c67
ReleaseDate
2024-05-02 00:00:00Z
RevisionHistory
RevisionEvent
ReleaseDate
2023-08-01 00:00:00Z
Note
Added DOI and PublicationInfo minted by JMW on 20230801. Updated SPASE version.
RevisionEvent
ReleaseDate
2024-05-02 00:00:00Z
Note
Updated SPASE version. Edited AccessInformation. JMW
Description

The FUV instrument takes 2D images of the Earth’s horizon in the Far ultraviolet. The imager is pointing approximately 90 degrees to the spacecraft motion, similar to looking out of the side window of a car as it drives down the road. Onboard electronics read the image 8 times per second and perform Time Delay Integration (TDI) to remove the motion-blur from the images. A turret is used to steer the field of view of the instrument left to right to ensure it always looks along the magnetic meridian (towards the magnetic pole).

Acknowledgement
National Aeronautics and Space Administration; Dr. Farzad Kamalabadi; Dr. Thomas Immel
PublicationInfo
Authors
Kamalabadi, F.
PublicationDate
2023-01-01 00:00:00
PublishedBy
NASA Space Physics Data Facility
Funding
Agency
National Aeronautics and Space Administration
Project
Explorers Program
AwardNumber
contracts NNG12FA45C
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Farzad.Kamalabadi
InformationURL
Name
Additional information on ICON
URL
https://icon.ssl.berkeley.edu/
Description

ICON spacecraft Homepage.

InformationURL
Name
The far ultra-violet Imager on the ICON mission
URL
https://doi.org/10.1007/s11214-017-0386-0
Description

Space Science Reviews, 212(1-2), pp.655-696. DOI: 10.1007/s11214-017-0386-0

AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
ICON_L2-5_FUV_NIGHT
Description

Web Service to this product using the HAPI interface.

Format
NetCDF
Acknowledgement
Please acknowledge Dr. Farzad Kamalabadi and Dr. Thomas Immel. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/icon/l2/l2-5_fuv_night/
ProductKey
ICON_L2-5_FUV_NIGHT
Description

Access to Data in NetCDF Format via https from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=ICON_L2-5_FUV_NIGHT&index=sp_phys
ProductKey
ICON_L2-5_FUV_NIGHT
Description

Access to NetCDFs via NASA/GSFC CDAWeb

Format
NetCDF
Encoding
None
Acknowledgement
Please acknowledge Dr. Farzad Kamalabadi and Dr. Thomas Immel. Please acknowledge the Data Providers and CDAWeb when using these Data.
ProcessingLevel
Calibrated
ProviderName
ICON FUV team
InstrumentIDs
spase://SMWG/Instrument/ICON/FUV
MeasurementType
ImageIntensity
TemporalDescription
TimeSpan
StartDate
2019-12-06 00:00:00Z
RelativeStopDate
-P2M
Cadence
PT30S
ObservedRegion
Earth.NearSurface.Atmosphere
ObservedRegion
Earth.NearSurface.Ionosphere
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description

Milliseconds since 1970-01-01 00:00:00 UTC at middle of measurement integration.

Cadence
PT12S
Units
ms
ValidMin
0
ValidMax
31536000000000
FillValue
-1
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #2
Name
Center UTC Integration Time
ParameterKey
ICON_L25_UTC_Time
Description

Center time of 12-second profile integration.

Cadence
PT12S
ValidMin
1970-01-01 00:00:00
ValidMax
2100-12-31 23:59:59
FillValue
''
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #3
Name
Start UTC Integration Time
ParameterKey
ICON_L25_Start_Times
Description

Start time of 12-second profile integration.

Cadence
PT12S
ValidMin
1970-01-01 00:00:00
ValidMax
2100-12-31 23:59:59
FillValue
''
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #4
Name
Stop UTC Integration Time
ParameterKey
ICON_L25_Stop_Times
Description

Stop time of 12-second profile integration.

Cadence
PT12S
ValidMin
1970-01-01 00:00:00
ValidMax
2100-12-31 23:59:59
FillValue
''
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #5
Name
Spacecraft WGS84 Latitude
ParameterKey
ICON_L25_Observatory_Position_Latitude
Description

The WGS84 latitude of the ICON S/C.

Cadence
PT12S
Units
degrees North
ValidMin
-90
ValidMax
90
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #6
Name
Spacecraft WGS84 Longitude
ParameterKey
ICON_L25_Observatory_Position_Longitude
Description

The WGS84 longitude of the ICON S/C.

Cadence
PT12S
Units
degrees East
ValidMin
0
ValidMax
360
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #7
Name
Altitude of the ICON S/C
ParameterKey
ICON_L25_Observatory_Position_Altitude
Description

The WGS84 altitude of the ICON S/C.

Cadence
PT12S
Units
km
ValidMin
0
ValidMax
1000
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #8
Name
Orbit Number
ParameterKey
ICON_L25_Orbit_Number
Description

Orbit Number

Cadence
PT12S
ValidMin
0
ValidMax
105000
FillValue
-999
Support
Qualifier
Scalar
SupportQuantity
Temporal
Parameter #9
Name
O+ latitude in WGS84
ParameterKey
ICON_L25_O_Plus_Profile_Latitude
Description

O+ latitude in WGS84.

Cadence
PT12S
Units
degrees North
ValidMin
-90
ValidMax
90
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #10
Name
O+ longitude in WGS84
ParameterKey
ICON_L25_O_Plus_Profile_Longitude
Description

O+ longitude in WGS84.

Cadence
PT12S
Units
degrees East
ValidMin
0
ValidMax
360
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #11
Name
Altitude of the ICON S/C
ParameterKey
ICON_L25_O_Plus_Profile_Altitude
Description

O+ altitude in WGS84

Cadence
PT12S
Units
km
ValidMin
100
ValidMax
600
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #12
Name
Field of View Celestial Azimuth
ParameterKey
ICON_L25_Celestial_Azimuth_Angle_Profile
Description

Field of View Celestial Azimuth.

Cadence
PT12S
Units
degrees
ValidMin
0
ValidMax
360
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #13
Name
Field of View Celestial Zenith
ParameterKey
ICON_L25_Celestial_Zenith_Angle_Profile
Description

Field of View Celestial Zenith.

Cadence
PT12S
Units
degrees
ValidMin
0
ValidMax
180
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #14
Name
Volume Emission Rate of 135.6-nm emission
ParameterKey
ICON_L25_VER
Description

VER of 135.6-nm emission as a function of altitude.

Cadence
PT12S
Units
ph/cm^3/s
ValidMin
0
ValidMax
100
FillValue
-999
Wave
WaveType
Photon
Qualifier
LineOfSight
WaveQuantity
VolumeEmissionRate
Parameter #15
Name
Error in VER of 135.6-nm Emission
ParameterKey
ICON_L25_VER_Error
Description

Error in VER of 135.6-nm emission as a function of altitude.

Cadence
PT12S
Units
ph/cm^3/s
ValidMin
0
ValidMax
100
FillValue
-999
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #16
Name
O+ Density as a Function of Altitude
ParameterKey
ICON_L25_O_Plus_Density
Description

O+ density as a function of altitude.

Cadence
PT12S
Units
1/cm^3
ValidMin
0
ValidMax
10000000000
FillValue
-999
Particle
ParticleType
Ion
Qualifier
LineOfSight
ParticleQuantity
FlowSpeed
AtomicNumber
8
Parameter #17
Name
Error in O+ Density
ParameterKey
ICON_L25_O_Plus_Density_Error
Description

Error in O+ density as a function of altitude.

Cadence
PT12S
Units
1/cm^3
ValidMin
0
ValidMax
10000000000
FillValue
-999
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #18
Name
Altitudes of the Peak O+ Densities
ParameterKey
ICON_L25_HMF2
Description

Altitudes of the peak O+ densities

Cadence
PT12S
Units
km
ValidMin
130
ValidMax
580
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #19
Name
Latitude of the Peak O+ densities
ParameterKey
ICON_L25_Latitude
Description

Latitudes of the peak O+ densities in WGS84.

Cadence
PT12S
Units
degrees
ValidMin
-90
ValidMax
90
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #20
Name
Longitude of the Peak O+ densities
ParameterKey
ICON_L21_Observatory_Longitude
Description

Longitudes of the peak O+ densities in WGS84.

Cadence
PT12S
Units
degrees
ValidMin
0
ValidMax
360
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #21
Name
Solar Zenith Angles of NmF2 Points
ParameterKey
ICON_L25_Solar_Zenith_Angle
Description

Solar zenith angles of peak ion density of the F-layer points (NmF2).

Cadence
PT12S
Units
degrees
ValidMin
0
ValidMax
180
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #22
Name
Magnetic Latitude of the Peak O+ densities
ParameterKey
ICON_L25_Magnetic_Latitude
Description

Magnetic latitudes of the peak O+ densities.

Cadence
PT12S
Units
degrees
ValidMin
-90
ValidMax
90
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #23
Name
Magnetic Longitude of the Peak O+ densities
ParameterKey
ICON_L25_Magnetic_Longitude
Description

Magnetic longitudes of the peak O+ densities in WGS84.

Cadence
PT12S
Units
degrees
ValidMin
0
ValidMax
360
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #24
Name
Error in Estimated Altitudes of the Peak O+ Densities
ParameterKey
ICON_L25_HMF2_Error
Description

Error in estimated altitudes of the peak O+ densities.

Cadence
PT12S
Units
ph/cm^3/s
ValidMin
0
ValidMax
1000
FillValue
-999
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #25
Name
Estimated Peak O+ Densities
ParameterKey
ICON_L25_NMF2
Description

Estimated peak O+ densities.

Cadence
PT12S
Units
1/cm^3
ValidMin
0
ValidMax
10000000000
FillValue
-999
Particle
ParticleType
Ion
Qualifier
LineOfSight
ParticleQuantity
FlowSpeed
AtomicNumber
8
Parameter #26
Name
Error in Estimated Altitudes of the Peak O+ Densities
ParameterKey
ICON_L25_NMF2_Error
Description

Error in estimated altitudes of the peak O+ densities.

Cadence
PT12S
Units
1/cm^3
ValidMin
0
ValidMax
10000000000
FillValue
-999
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #27
Name
Local Solar Time at the Retrieved Peak O+ Density Locations
ParameterKey
ICON_L25_Local_Solar_Time
Description

Local solar times at the retrieved peak O+ density locations.

Cadence
PT12S
Units
hours
ValidMin
0
ValidMax
24
FillValue
-999
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #28
Name
Inversion Quality
ParameterKey
ICON_L25_Quality
Description

A quantification of the inversion quality, from 0 (Bad) to 1 (Good).

Cadence
PT12S
ValidMin
0
ValidMax
1
FillValue
-999
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #29
Name
Quality Flags
ParameterKey
ICON_L25_Quality_Flags
Description

Provides description about the observed inversion quality.

Cadence
PT30S
ValidMin
0
ValidMax
31
FillValue
-999
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #30
Name
Inversion Method
ParameterKey
ICON_L25_Inversion_Method
Description

Used inversion method to get VER from brightness.

Cadence
PT12S
FillValue
''
Support
Qualifier
Fit
SupportQuantity
Other