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IMAGE FUV SI plots of O/N2 Ratios

ResourceID
spase://NASA/DisplayData/IMAGE/FUV/SI/O_N2_Ratios

Description

This data set consists of images of thermospheric
O/N2 column density ratios at 2-min resolution during times of strong
geomagnetic storms (Dst.LT.-80nT) of 2000-2005. The ratios are generated
from dayside airglow observations of the IMAGE Far Ultraviolet (FUV)
Spectrographic Imager (SI). The SI has a peak response at the OI 135.6 nm
oxygen emission line and a bandpass of 131.0 to 140.0 nm which includes
the LBH band from N2 molecules. For each O/N2 plot, there is a plot of the
SI image from which the O/N2 plot was generated, and there is an IDL saveset
of the content of the O/N2 maps. The Information URL of this descriptor
identifies detailed discussions of the derivations of O/N2 rations from the
SI images.

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Details

Version:2.2.2

DisplayData

ResourceID
spase://NASA/DisplayData/IMAGE/FUV/SI/O_N2_Ratios
ResourceHeader
ResourceName
IMAGE FUV SI plots of O/N2 Ratios
ReleaseDate
2020-07-07 19:48:33Z
Description

This data set consists of images of thermospheric
O/N2 column density ratios at 2-min resolution during times of strong
geomagnetic storms (Dst.LT.-80nT) of 2000-2005. The ratios are generated
from dayside airglow observations of the IMAGE Far Ultraviolet (FUV)
Spectrographic Imager (SI). The SI has a peak response at the OI 135.6 nm
oxygen emission line and a bandpass of 131.0 to 140.0 nm which includes
the LBH band from N2 molecules. For each O/N2 plot, there is a plot of the
SI image from which the O/N2 plot was generated, and there is an IDL saveset
of the content of the O/N2 maps. The Information URL of this descriptor
identifies detailed discussions of the derivations of O/N2 rations from the
SI images.

Contacts
RolePersonStartDateStopDateNote
1.DataProducerspase://SMWG/Person/Yongliang.Zhang
InformationURL
Name
Data descriptive text at JHU_APL
URL
https://image.gsfc.nasa.gov/index.php?documentation
PriorIDs
spase://VSPO/DisplayData/IMAGE/FUV/SI/O_N2_Ratios
AccessInformation
RepositoryID
spase://SMWG/Repository/JHU_APL
Availability
Online
AccessRights
Open
AccessURL
Name
IMAGE O/N2 site at JHU/APL
URL
https://image.gsfc.nasa.gov/index.php?data
Description

O/N2 and FUV/SI image plots in PNG format

Format
PNG
InstrumentIDs
spase://SMWG/Instrument/IMAGE/FUV
MeasurementType
ImageIntensity
TemporalDescription
TimeSpan
StartDate
2000-05-24 00:00:00
StopDate
2005-05-18 23:59:59
Cadence
PT2M
ObservedRegion
Earth.NearSurface.Thermosphere
Caveats
(1) O/N2 values are available only for dayside with solar zenith angle less than 90 degrees. (2) Auroral emissions are not removed. The O/N2 data in the auroral oval should not be used. The original SI-13 images are also provided in the APL web site to identify auroral regions. (3) SI-13 flat field algorithm is provided by the IMAGE FUV team. But it may not work well all the time. This impacts the O/N2 products. (4) Pointing of SI-13 is still subject to some errors even after attitude correction is done. (5) A fixed O/N2 value (assumed) for quiet times may ignore the effects of season and solar EUV flux.