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ICON Michelson Interferometer for Global High-resolution Thermospheric Imaging Wind Vectors Green

(2023). ICON Michelson Interferometer for Global High-resolution Thermospheric Imaging Wind Vectors Green [Data set]. NASA Space Physics Data Facility. https://doi.org/10.48322/vtce-7y29. 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/MIGHTI/L2/Vector/Green/PT30S

Description

The MIGHTI instrument measures the horizontal wind speed and direction (the wind vector). Each MIGHTI unit measures the wind along its line of sight. MIGHTI uses two perpendicular fields of view nominally pointing 45 degrees and 135 degrees in azimuth from the spacecraft velocity (MIGHTI A and MIGHTI B). Combining data from both units, this 90 degrees separation between their views allows the wind vector to be determined. For the wind measurements MIGHTI observes the Doppler shift of the atomic oxygen red and green lines at 630.0 nm and 557.7 nm wavelength. The wavelength shift is measured using field-widened, temperature compensated Doppler Asymmetric Spatial Heterodyne (DASH) spectrometers, employing low order échelle gratings operating at two different orders for the different atmospheric lines. The temperature measurement is accomplished by a multichannel photometric measurement of the spectral shape of the molecular oxygen A-band around 762 nm wavelength. For each field of view, the signals of the two oxygen lines and the A-band are detected on different regions of a single, cooled, frame transfer charge coupled device (CCD) detector. On-board calibration sources are used to periodically quantify thermal drifts, simultaneously with observing the atmosphere.

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Details

Version:2.6.0

NumericalData

ResourceID
spase://NASA/NumericalData/ICON/MIGHTI/L2/Vector/Green/PT30S
ResourceHeader
ResourceName
ICON Michelson Interferometer for Global High-resolution Thermospheric Imaging Wind Vectors Green
AlternateName
MIGHTI Wind Vectors Green
DOI
https://doi.org/10.48322/vtce-7y29
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
2024-01-22 00:00:00Z
Note
Updated PublicationInfo Authors. JMW.
RevisionEvent
ReleaseDate
2024-05-02 00:00:00Z
Note
Edited AccessInformation. JMW
Description

The MIGHTI instrument measures the horizontal wind speed and direction (the wind vector). Each MIGHTI unit measures the wind along its line of sight. MIGHTI uses two perpendicular fields of view nominally pointing 45 degrees and 135 degrees in azimuth from the spacecraft velocity (MIGHTI A and MIGHTI B). Combining data from both units, this 90 degrees separation between their views allows the wind vector to be determined. For the wind measurements MIGHTI observes the Doppler shift of the atomic oxygen red and green lines at 630.0 nm and 557.7 nm wavelength. The wavelength shift is measured using field-widened, temperature compensated Doppler Asymmetric Spatial Heterodyne (DASH) spectrometers, employing low order échelle gratings operating at two different orders for the different atmospheric lines. The temperature measurement is accomplished by a multichannel photometric measurement of the spectral shape of the molecular oxygen A-band around 762 nm wavelength. For each field of view, the signals of the two oxygen lines and the A-band are detected on different regions of a single, cooled, frame transfer charge coupled device (CCD) detector. On-board calibration sources are used to periodically quantify thermal drifts, simultaneously with observing the atmosphere.

Acknowledgement
National Aeronautics and Space Administration; Dr. Brian J. Harding; Dr. Thomas Immel
PublicationInfo
Authors
Harding, B. J.; Englert, C. R.; Harlander, J. M.; Marr, K. D.; Makela, J. M.; Brown, C. M.; England, S. L.; Immel, T. J.
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 and NNG12FA42I
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Brian.J.Harding
2.MetadataContactspase://SMWG/Person/James.M.Weygand
InformationURL
Name
Additional information on ICON
URL
https://icon.ssl.berkeley.edu/
Description

ICON spacecraft Homepage.

InformationURL
Name
Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI): instrument design and calibration
URL
https://doi.org/10.1007/s11214-017-0358-4
Description

Space Science Reviews, 212(1-2), pp.553-584. DOI: 10.1007/s11214-017-0358-4

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_L2-2_MIGHTI_VECTOR-WIND-GREEN
Description

Web Service to this product using the HAPI interface.

Format
NetCDF
Acknowledgement
Please acknowledge Dr. Brian J. Harding 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/l2-2_mighti_vector-wind-green/
ProductKey
ICON_L2-2_MIGHTI_VECTOR-WIND-GREEN
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_L2-2_MIGHTI_VECTOR-WIND-GREEN&index=sp_phys
ProductKey
ICON_L2-2_MIGHTI_VECTOR-WIND-GREEN
Description

Access to NetCDFs via NASA/GSFC CDAWeb

Format
NetCDF
Encoding
None
Acknowledgement
Please acknowledge Dr. Brian J. Harding and Dr. Thomas Immel. Please acknowledge the Data Providers and CDAWeb when using these Data.
ProcessingLevel
Calibrated
ProviderName
ICON MIGHTI team
InstrumentIDs
spase://SMWG/Instrument/ICON/MIGHTI
MeasurementType
Dopplergram
TemporalDescription
TimeSpan
StartDate
2019-12-06 00:00:00Z
StopDate
2022-11-24 23:59:59Z
Cadence
PT30S
ObservedRegion
Earth.NearSurface.Atmosphere
ObservedRegion
Earth.NearSurface.Ionosphere
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description

Sample time, midpoint of exposure. Number of msec since Jan 1, 1970.

Cadence
PT30S
Units
ms
ValidMin
0
ValidMax
31536000000000
FillValue
-9223372036854775806
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #2
Name
Epoch Time: Midpoint of A and B Measurements
ParameterKey
Epoch_Full
Description

Sample time, midpoint of A and B measurements. Number of msec since Jan 1, 1970.

Cadence
PT30S
Units
ms
ValidMin
0
ValidMax
31536000000000
FillValue
-9223372036854775806
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #3
Name
Epoch time: Average of A and B Measurements
ParameterKey
ICON_L22_UTC_Time
Description

Sample time, average of A and B measurements.

Cadence
PT30S
Units
date/time
FillValue
''
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #4
Name
Zonal Component of the Horizontal Wind.
ParameterKey
ICON_L22_Zonal_Wind
Description

Zonal component of the horizontal wind. Positive Eastward.

Cadence
PT30S
Units
m/s
ValidMin
-4000
ValidMax
4000
FillValue
9.969209968386869e+36
Particle
ParticleType
Molecule
Qualifier
LineOfSight
ParticleQuantity
FlowSpeed
Parameter #5
Name
Meridonal Component of the Horizontal Wind.
ParameterKey
ICON_L22_Meridional_Wind
Description

Meridional component of the horizontal wind. Positive Northward.

Cadence
PT30S
Units
m/s
ValidMin
-4000
ValidMax
4000
FillValue
9.969209968386869e+36
Particle
ParticleType
Molecule
Qualifier
LineOfSight
ParticleQuantity
FlowSpeed
Parameter #6
Name
Zonal Wind Errors
ParameterKey
ICON_L22_Zonal_Wind_Error
Description

Error in the zonal wind estimate.

Cadence
PT30S
Units
m/s
ValidMin
0
ValidMax
4000
FillValue
9.969209968386869e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #7
Name
Meridional Wind Errors
ParameterKey
ICON_L22_Meridional_Wind_Error
Description

Error in the meridional wind estimate.

Cadence
PT30S
Units
m/s
ValidMin
0
ValidMax
4000
FillValue
9.969209968386869e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #8
Name
Wind Quality Flag
ParameterKey
ICON_L22_Wind_Quality
Description

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

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
9.969209968386869e+36
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #9
Name
Fringe Amplitude
ParameterKey
ICON_L22_Fringe_Amplitude
Description

Fringe amplitude.

Cadence
PT30S
Units
arb
ValidMin
-1e+30
ValidMax
1e+30
FillValue
9.969209968386869e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #10
Name
Fringe Amplitude Error
ParameterKey
ICON_L22_Fringe_Amplitude_Error
Description

Error in the fringe amplitude estimate.

Cadence
PT30S
Units
arb
ValidMin
0
ValidMax
1e+30
FillValue
9.969209968386869e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #11
Name
Relative Volume Emission Rate
ParameterKey
ICON_L22_Relative_VER
Description

Relative volume emission rate profile.

Cadence
PT30S
Units
ph/cm^3/s
ValidMin
0
ValidMax
1e+30
FillValue
9.969209968386869e+36
Wave
WaveType
Photon
Qualifier
LineOfSight
WaveQuantity
VolumeEmissionRate
Parameter #12
Name
Relative Volume Emission Rate Error
ParameterKey
ICON_L22_Relative_VER_Error
Description

Error in VER estimate (statistical).

Cadence
PT30S
Units
ph/cm^3/s
ValidMin
0
ValidMax
1e+30
FillValue
9.969209968386869e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #13
Name
Relative Volume Emission Rate Quality Flag
ParameterKey
ICON_L22_VER_Quality
Description

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

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
9.969209968386869e+36
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #14
Name
Magnetic Field-Aligned Component of the Wind.
ParameterKey
ICON_L22_Magnetic_Field_Aligned_Wind
Description

Magnetic field-aligned component of the wind.

Cadence
PT30S
Units
m/s
ValidMin
-4000
ValidMax
4000
FillValue
9.969209968386869e+36
Particle
ParticleType
Molecule
Qualifier
LineOfSight
ParticleQuantity
FlowSpeed
Parameter #15
Name
Magnetic Meridional Component of the Wind.
ParameterKey
ICON_L22_Magnetic_Meridional_Wind
Description

Magnetic meridional component of the wind.

Cadence
PT30S
Units
m/s
ValidMin
-4000
ValidMax
4000
FillValue
9.969209968386869e+36
Particle
ParticleType
Molecule
Qualifier
LineOfSight
ParticleQuantity
FlowSpeed
Parameter #16
Name
Magnetic Zonal Component of the Wind.
ParameterKey
ICON_L22_Magnetic_Zonal_Wind
Description

Magnetic zonal component of the wind.

Cadence
PT30S
Units
m/s
ValidMin
-4000
ValidMax
4000
FillValue
9.969209968386869e+36
Particle
ParticleType
Molecule
Qualifier
LineOfSight
ParticleQuantity
FlowSpeed
Parameter #17
Name
Altitude of Wind Sample
ParameterKey
ICON_L22_Altitude
Description

WGS84 altitude of each wind sample.

Cadence
PT30S
Units
km
ValidMin
50
ValidMax
1000
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #18
Name
Latitude of Wind Sample
ParameterKey
ICON_L22_Latitude
Description

WGS84 latitude of each wind sample.

Cadence
PT30S
Units
deg
ValidMin
-90
ValidMax
90
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #19
Name
Longitude of Wind Sample
ParameterKey
ICON_L22_Longitude
Description

WGS84 longitude of each wind sample.

Cadence
PT30S
Units
deg
ValidMin
0
ValidMax
360
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #20
Name
Magnetic Latitude of Wind Sample
ParameterKey
ICON_L22_Magnetic_Latitude
Description

Magnetic quasi-dipole latitude of each wind sample.

Cadence
PT30S
Units
deg
ValidMin
-90
ValidMax
90
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #21
Name
Magnetic Longitude of Wind Sample
ParameterKey
ICON_L22_Magnetic_Longitude
Description

Magnetic quasi-dipole longitude of each wind sample.

Cadence
PT30S
Units
deg
ValidMin
0
ValidMax
360
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #22
Name
Solar Zenith Angle of Each Wind Sample
ParameterKey
ICON_L22_Solar_Zenith_Angle
Description

Solar zenith angle of each wind sample.

Cadence
PT30S
Units
degrees
ValidMin
0
ValidMax
180
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #23
Name
Local Solar Time of Each Wind Sample
ParameterKey
ICON_L22_Local_Solar_Time
Description

Local solar time of each wind sample.

Cadence
PT30S
Units
hours
ValidMin
0
ValidMax
24
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #24
Name
Difference Between MIGHTI-A and B Times
ParameterKey
ICON_L22_Time_Delta
Description

Difference between MIGHTI-A and B times contributing to each point.

Cadence
PT30S
Units
s
ValidMin
0
ValidMax
120
FillValue
9.969209968386869e+36
Support
Qualifier
Total
SupportQuantity
Temporal
Parameter #25
Name
Fringe Amplitude from MIGHTI-A
ParameterKey
ICON_L22_Fringe_Amplitude_A
Description

Fringe Amplitude from MIGHTI-A.

Cadence
PT30S
Units
arb
ValidMin
-1e+30
ValidMax
1e+30
FillValue
9.969209968386869e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #26
Name
Fringe Amplitude from MIGHTI-B
ParameterKey
ICON_L22_Fringe_Amplitude_B
Description

Fringe Amplitude from MIGHTI-B.

Cadence
PT30S
Units
arb
ValidMin
-1e+30
ValidMax
1e+30
FillValue
9.969209968386869e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #27
Name
Relative Volume Emission Rate from MIGHTI-A
ParameterKey
ICON_L22_Relative_VER_A
Description

Relative Volume Emission Rate from MIGHTI-A.

Cadence
PT30S
Units
ph/cm^3/s
ValidMin
-1e+30
ValidMax
1e+30
FillValue
9.969209968386869e+36
Wave
WaveType
Photon
Qualifier
LineOfSight
WaveQuantity
VolumeEmissionRate
Parameter #28
Name
Relative Volume Emission Rate from MIGHTI-B
ParameterKey
ICON_L22_Relative_VER_B
Description

Relative Volume Emission Rate from MIGHTI-B.

Cadence
PT30S
Units
ph/cm^3/s
ValidMin
-1e+30
ValidMax
1e+30
FillValue
9.969209968386869e+36
Wave
WaveType
Photon
Qualifier
LineOfSight
WaveQuantity
VolumeEmissionRate
Parameter #29
Name
Volume Emission Rate Relative Differences
ParameterKey
ICON_L22_VER_Relative_Difference
Description

Difference in MIGHTI A and B's VER estimates, divided by the mean.

Cadence
PT30S
ValidMin
0
ValidMax
10000000000
FillValue
9.969209968386869e+36
Wave
WaveType
Photon
Qualifier
LineOfSight
WaveQuantity
VolumeEmissionRate
Parameter #30
Name
Orbit Number
ParameterKey
ICON_L22_Orbit_Number
Description

Orbit Number

Cadence
PT30S
ValidMin
0
ValidMax
1000000
FillValue
9.969209968386869e+36
Support
Qualifier
Scalar
SupportQuantity
Temporal
Parameter #31
Name
Orbit Node Flag
ParameterKey
ICON_L22_Orbit_Node
Description

Orbit Ascending/Descending Node Flag.

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
-127
Support
Qualifier
Scalar
SupportQuantity
Orientation
Parameter #32
Name
Quality Flags
ParameterKey
ICON_L22_Quality_Flags
Description

Quality flags.

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
-127
Support
Qualifier
Scalar
SupportQuantity
DataQuality