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ICON Michelson Interferometer for Global High-resolution Thermospheric Imaging viewing direction A

(2023). ICON Michelson Interferometer for Global High-resolution Thermospheric Imaging viewing direction A [Data set]. NASA Space Physics Data Facility. https://doi.org/10.48322/07nf-qa27. 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/A/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/A/Green/PT30S
ResourceHeader
ResourceName
ICON Michelson Interferometer for Global High-resolution Thermospheric Imaging viewing direction A
AlternateName
MIGHTI A LOS Green
DOI
https://doi.org/10.48322/07nf-qa27
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
2024-01-25 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_L2-1_MIGHTI-A_LOS-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/l2-1_mighti-a_los-wind-green/
ProductKey
ICON_L2-1_MIGHTI-A_LOS-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_L2-1_MIGHTI-A_LOS-WIND-GREEN&index=sp_phys
ProductKey
ICON_L2-1_MIGHTI-A_LOS-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
Time
ParameterKey
ICON_L21_Time
Description

Sample time at start, mid, stop 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 #3
Name
UTC time
ParameterKey
ICON_L21_UTC_Time
Description

Sample time, midpoint of exposure.

Cadence
PT30S
Units
date/time
FillValue
''
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #4
Name
Line-of-Sight Wind Values
ParameterKey
ICON_L21_Line_of_Sight_Wind
Description

Line-of-sight horizontal wind profile. A positive wind is towards MIGHTI.

Cadence
PT30S
Units
m/s
ValidMin
-4000
ValidMax
4000
FillValue
9.969209968386869e+36
Particle
ParticleType
Molecule
Qualifier
LineOfSight
ParticleQuantity
FlowSpeed
Parameter #5
Name
Line-of-Sight Wind Errors
ParameterKey
ICON_L21_Line_of_Sight_Wind_Error
Description

Line-of-sight horizontal wind error profile.

Cadence
PT30S
Units
m/s
ValidMin
0
ValidMax
4000
FillValue
9.969209968386869e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #6
Name
Wind Quality Flag
ParameterKey
ICON_L21_Wind_Quality
Description

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

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
9.969209968386869e+36
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #7
Name
Fringe Amplitude Profile
ParameterKey
ICON_L21_Fringe_Amplitude
Description

Fringe amplitude profile.

Cadence
PT30S
Units
arb
ValidMin
-1e+30
ValidMax
1e+30
FillValue
9.969209968386869e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #8
Name
Fringe Amplitude Error Profile
ParameterKey
ICON_L21_Fringe_Amplitude_Error
Description

Fringe amplitude error profile.

Cadence
PT30S
Units
arb
ValidMin
0
ValidMax
1e+30
FillValue
9.969209968386869e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #9
Name
Relative Volume Emission Rate
ParameterKey
ICON_L21_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 #10
Name
Relative Volume Emission Rate Error
ParameterKey
ICON_L21_Relative_VER_Error
Description

Relative volume emission rate error profile.

Cadence
PT30S
Units
ph/cm^3/s
ValidMin
0
ValidMax
1e+30
FillValue
9.969209968386869e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #11
Name
Relative Volume Emission Rate Quality Flag
ParameterKey
ICON_L21_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 #12
Name
Altitude of Wind Sample
ParameterKey
ICON_L21_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 #13
Name
Latitude of Wind Sample
ParameterKey
ICON_L21_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 #14
Name
Longitude of Wind Sample
ParameterKey
ICON_L21_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 #15
Name
Magnetic Latitude of Wind Sample
ParameterKey
ICON_L21_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 #16
Name
Magnetic Longitude of Wind Sample
ParameterKey
ICON_L21_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 #17
Name
Azimuth Angle of the Line of Sight
ParameterKey
ICON_L21_Line_of_Sight_Azimuth
Description

Azimuth angle of the line of sight at the tangent point. Deg East of North.

Cadence
PT30S
Units
degrees
ValidMin
0
ValidMax
360
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #18
Name
Solar Zenith Angle of Each Wind Sample
ParameterKey
ICON_L21_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 #19
Name
Local Solar Time of Each Wind Sample
ParameterKey
ICON_L21_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 #20
Name
Exposure Time
ParameterKey
ICON_L21_Exposure_Time
Description

The exposure time for each profile

Cadence
PT30S
Units
s
ValidMin
0
ValidMax
120
FillValue
9.969209968386869e+36
Support
Qualifier
Total
SupportQuantity
Temporal
Parameter #21
Name
Variance of the Phase
ParameterKey
ICON_L21_Chi2
Description

Variance of the phase in each (unwrapped) row: (std of phase)^2.

Cadence
PT30S
Units
rad^2
ValidMin
0
ValidMax
1e+30
FillValue
9.969209968386869e+36
Support
Qualifier
Variance
SupportQuantity
Other
Parameter #22
Name
Velocity Vector
ParameterKey
ICON_L21_Observatory_Velocity_Vector
Description

ICON S/C velocity vector in Earth-centered, Earth-fixed coordinates.

Cadence
PT30S
Units
m/s
ValidMin
-100000000
ValidMax
100000000
FillValue
9.969209968386869e+36
Particle
ParticleType
Molecule
Qualifier
LineOfSight
ParticleQuantity
FlowSpeed
Parameter #23
Name
Latitude of the ICON S/C
ParameterKey
ICON_L21_Observatory_Latitude
Description

The WGS84 latitude of the ICON S/C.

Cadence
PT30S
Units
deg
ValidMin
-90
ValidMax
90
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #24
Name
Longitude of the ICON S/C
ParameterKey
ICON_L21_Observatory_Longitude
Description

The WGS84 longitude of the ICON S/C.

Cadence
PT30S
Units
deg
ValidMin
0
ValidMax
360
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #25
Name
Altitude of the ICON S/C
ParameterKey
ICON_L21_Observatory_Altitude
Description

The WGS84 altitude of the ICON S/C.

Cadence
PT30S
Units
km
ValidMin
100
ValidMax
2000
FillValue
9.969209968386869e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #26
Name
Line of Sight Direction of MIGHTI
ParameterKey
ICON_L21_Line_of_Sight_Vector
Description

The look direction of each MIGHTI line of sight, as a vector in ECEF.

Cadence
PT30S
ValidMin
-1
ValidMax
1
FillValue
9.969209968386869e+36
Support
Qualifier
Vector
SupportQuantity
Orientation
Parameter #27
Name
Orbit Number
ParameterKey
ICON_L21_Orbit_Number
Description

Orbit Number

Cadence
PT30S
ValidMin
0
ValidMax
1000000
FillValue
-9223372036854775806
Support
Qualifier
Scalar
SupportQuantity
Temporal
Parameter #28
Name
Orbit Node Flag
ParameterKey
ICON_L21_Orbit_Node
Description

Orbit Ascending/Descending Node Flag.

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
-127
Support
Qualifier
Scalar
SupportQuantity
Orientation
Parameter #29
Name
Number of Binned Raw Samples
ParameterKey
ICON_L21_Bin_Size
Description

How many raw samples were binned vertically for each reported sample.

Cadence
PT30S
ValidMin
1
ValidMax
100
FillValue
-127
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #30
Name
Integration Order
ParameterKey
ICON_L21_Integration_Order
Description

Order used to discretize the integral for inversion: 0=Riemann, 1=Trapezoidal.

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
-127
Support
Qualifier
Integral
SupportQuantity
Other
Parameter #31
Name
ICON Top Layer Model
ParameterKey
ICON_L21_Top_Layer_Model
Description

How the top altitudinal layer is handled in the inversion: "exp" or "thin."

Cadence
PT30S
FillValue
' '
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #32
Name
Attitude of Local Vertical Local Horizontal Normal
ParameterKey
ICON_L21_Attitude_LVLH_Normal
Description

Attitude status bit 0: local vertical local horizontal Normal.

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
-127
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #33
Name
Attitude of Local Vertical Local Horizontal Reverse
ParameterKey
ICON_L21_Attitude_LVLH_Reverse
Description

Attitude status bit 1: Local Vertical Local Horizontal Reverse.

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
-127
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #34
Name
Attitude of Earth Limb Pointing Status
ParameterKey
ICON_L21_Attitude_Limb_Pointing
Description

Attitude status bit 2: Earth Limb Pointing.

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
-127
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #35
Name
Attitude: Conjugate Maneuver Status
ParameterKey
ICON_L21_Attitude_Conjugate_Maneuver
Description

Attitude status bit 6: Conjugate Maneuver.

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
-127
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #36
Name
Attitude Quality Flag
ParameterKey
ICON_L21_Quality_Flags
Description

Attitude quality flag.

Cadence
PT30S
ValidMin
0
ValidMax
1
FillValue
-127
Support
Qualifier
Scalar
SupportQuantity
DataQuality
Parameter #37
Name
Relative Volume Emission Rate (DC Value)
ParameterKey
ICON_L21_Relative_VER_DC
Description

Relative volume emission rate profile derived from DC value.

Cadence
PT30S
Units
ph/cm^3/s
ValidMin
0
ValidMax
1e+30
FillValue
9.969209968386869e+36
Wave
WaveType
Photon
Qualifier
LineOfSight
WaveQuantity
VolumeEmissionRate