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Data Access
SEE Data Products web page
TIMED SEE Level2B EGS Occultations Data
var authors='Woods, Thomas N.';
document.write(authors);
(2025).
TIMED SEE Level2B EGS Occultations Data.
[Data set].
Johns Hopkins University Applied Physics Laboratory.
https://doi.org/10.48322/5685-c721. Accessed on document.write(currentDateStr);.
Note: Proper references, including
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or other formats, should include the "Accessed on date" to identify the version of the resource being cited in a given publication.
ResourceID
spase://NASA/NumericalData/TIMED/SEE/L2B_EGS
Description
The EUV Grating Spectrograph (EGS) aboard SEE performs measurements of the Sun for about 3 minutes every orbit (97 minutes) which usually gives 14-15 measurements per day. 4x per year, in-between direct solar measurements, the SEE instrument has opportunities to observe the solar irradiance transmitted through the atmosphere. The Level 2B EGS Occultation data is time averaged over each measurement and divided by the average of the previous and next solar observations. The EGS resolution is about 0.4 nm, but the data product is sampled at 0.1 nm with valid data ranging from ~27-190 nm.
Metadata Rights
CC0-1.0:
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.
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Details
Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/TIMED/SEE/L2B_EGS
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
TIMED SEE Level2B EGS Occultations Data
DOI
https://doi.org/10.48322/5685-c721
ReleaseDate
2026-06-26 13:29:56Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:15:38Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-11-14 16:01:52Z
Note
Added PublicationInfo. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:32:06Z
Note
Added MetadataRightsList. Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-02-16 14:46:15Z
Note
Added DOI. TLK
RevisionEvent
ReleaseDate
2026-06-26 13:29:56Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate. ZCB
Description
The EUV Grating Spectrograph (EGS) aboard SEE performs measurements of the Sun for about 3 minutes every orbit (97 minutes) which usually gives 14-15 measurements per day. 4x per year, in-between direct solar measurements, the SEE instrument has opportunities to observe the solar irradiance transmitted through the atmosphere. The Level 2B EGS Occultation data is time averaged over each measurement and divided by the average of the previous and next solar observations. The EGS resolution is about 0.4 nm, but the data product is sampled at 0.1 nm with valid data ranging from ~27-190 nm.
Acknowledgement
NASA, Thomas N. Woods
PublicationInfo
Authors
Woods, Thomas N.
PublicationDate
2025-11-14 16:01:52Z
PublishedBy
Johns Hopkins University Applied Physics Laboratory
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Thomas.N.Woods
InformationURL
Name
L2B EGS Data Information
URL
http://lasp.colorado.edu/home/see/data/observational-averages/egs-level-2b-occultations/
PriorIDs
spase://VITMO/NumericalData/TIMED/SEE/L2B_EGS
spase://VSPO/NumericalData/TIMED/SEE/L2B_EGS
AccessInformation
RepositoryID
spase://SMWG/Repository/TIMED/SEE_POC
Availability
Online
AccessRights
Open
AccessURL
Name
SEE Data Products web page
URL
http://lasp.colorado.edu/home/see/data/
Description
This web page allows the request of data files for this product. To request data: for the EGS_2B data type of interest, click the year of interest to go the the ftp directory of files and download the desired day-long file by clicking on it.
Format
NetCDF
Encoding
None
Acknowledgement
NASA, Thomas N. Woods
ProcessingLevel
Calibrated
ProviderResourceName
SEE Level 2B EGS Occultation data
ProviderProcessingLevel
Level 2B
ProviderVersion
10
InstrumentIDs
spase://SMWG/Instrument/TIMED/SEE
MeasurementType
Irradiance
TemporalDescription
TimeSpan
StartDate
2002-04-25 00:00:00.000Z
RelativeStopDate
P2Y
ObservedRegion
Sun
Keywords
TIMED
SEE
EGS
Sun
Parameter #1
Name
EGS Atmospheric transmission through the tangent ray point
ParameterKey
TRANSMISSION
Description
Atmospheric transmission through the tangent ray point (Note
that due to finite and variable instrument precision, this value may exceed 1.)
Transmissions are calculated by averaging 6-8 transmission measurements and dividing
by the average of approximately 20 direct solar measurements from the previous
orbit with 20 additional direct solar measurements from the next orbit.
Units
unitless
FillValue
-1
Wave
WaveType
Electromagnetic
WaveQuantity
Wavelength
WavelengthRange
Low
26.05
High
194.95
Units
nm