Version:2.2.2
NumericalData
ResourceID
spase://NASA/NumericalData/TIMED/SEE/L2_XPS
ResourceHeader
ResourceName
TIMED SEE Level2 XPS Solar Irradiance Data
ReleaseDate
2020-07-07 21:15:38Z
Description
The 12 X-Ray Photometers (XP) aboard SEE perform full-disk irradiance measurements of the Sun for about 3 minutes every orbit (97 minutes) which usually gives 14-15 measurements per day. 8 of the XPs produce XUV signals (more info on XP coatings) and one other XP provides a hydrogen Lyman-alpha measurement (121.5 nm). The XPS Level 2 data is time averaged over the entire day, after being 1-AU corrected and removing flares. The 1-AU correction is provided.
Acknowledgement
NASA, Thomas N. Woods
Contacts
InformationURL
Name
L2 XPS Data Information
URL
PriorIDs
spase://VITMO/NumericalData/TIMED/SEE/L2_XPS
spase://VSPO/NumericalData/TIMED/SEE/L2_XPS
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
SEE Data Products web page
URL
Description
This web page allows the request of data files for this product. To request data: for the XPS 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 2 XPS Solar Irradiance data
ProviderProcessingLevel
Level 2
ProviderVersion
10
InstrumentIDs
MeasurementType
Irradiance
TemporalDescription
TimeSpan
StartDate
2002-01-22 00:00:00.000
RelativeStopDate
P2D
ObservedRegion
Sun
Keywords
TIMED
SEE
XPS
Sun
Parameter #1
Name
Date of observation
ParameterKey
DATE
Description
Date of observation
Units
YYYY-DOY
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #2
Name
Channel index
ParameterKey
CHANNEL
Description
Channel index of the 12 XUV Photometers (1-12)
Units
NONE
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #3
Name
Bandpass wavelength range
ParameterKey
WAVE(structure_elements, dim1_WAVE)
Description
Bandpass wavelength range
Units
nm
Structure
Size
9 2
Description
Dimensions: [Number_of_bandpass_wavelength_ranges, Bandpass_wavelength_range_limits] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges, and Bandpass_wavelength_range_limits is the pair of values specifying the lower and upper wavelength limits.
Support
Parameter #4
Name
XPS median solar irradiance
ParameterKey
FLUX_MEDIAN
Description
Solar irradiance - median for the day
Units
W / m^2
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Wave
WaveType
Electromagnetic
WaveQuantity
Wavelength
WavelengthRange
Low
0.1
High
122.0
Units
nm
Bin
BandName
Channel 1: Ti/C-14 coating
Low
0.1
High
7
Bin
BandName
Channel 2: Ti/C-10 coating
Low
0.1
High
7
Bin
BandName
Channel 3: Al/Sc/C-24 coating
Low
17
High
23
Bin
BandName
Channel 5: Ti/Pd-17 coating
Low
0.1
High
10
Bin
BandName
Channel 6: Ti/Zr/Au-04 coating
Low
0.1
High
10
Bin
BandName
Channel 7: Al/Nb/C-03 coating
Low
17
High
21
Bin
BandName
Channel 9: Al/Mn-06 coating
Low
0.1
High
7
Bin
BandName
Channel 10: Cr/Al-07 coating
Low
0.1
High
7.0
Bin
BandName
Channel 11: Lyman-alpha
Low
121
High
122
Parameter #5
Name
Difference of median and weighted average solar irradiance
ParameterKey
DIFF_MA
Description
Difference of median and weighted average solar irradiance over the day
Units
W / m^2
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #6
Name
Accuracy of solar irradiance
ParameterKey
ERR_TOT
Description
Accuracy of solar irradiance averaged over the day
Units
Fractional
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #7
Name
Measurement precision
ParameterKey
ERR_MEAS
Description
Measurement precision averaged over the day
Units
Fractional
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #8
Name
Standard deviation of median for good measurements
ParameterKey
STDEV_MEAS
Description
Standard deviation of median for good measurements
Units
Fractional
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #9
Name
AU correction factor
ParameterKey
COR_1AU
Description
AU correction factor for date
Units
1 / (AU^2)
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #10
Name
Median of Total-Dark-Visible currents
ParameterKey
CURRENT
Description
Median of Total-Dark-Visible currents from level 1 with FOV and 1-AU corrections applied
Units
nanoAmps
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #11
Name
Number of measurements used
ParameterKey
NUMPT
Description
Number of measurements used in daily average
Units
NONE
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #12
Name
Instrument degradation correction factor
ParameterKey
COR_DEGRADE
Description
Instrument degradation correction factor
Units
Fractional
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #13
Name
Degradation function linear extrapolation/interpolation flag
ParameterKey
DEGRADE_MODEL
Description
Long value = 1 if degradation function is linearly extrapolated, 0 if linearly interpolated
Units
None
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #14
Name
Atmospheric correction factors average
ParameterKey
COR_ATMOS.AVG
Description
Average of atmospheric correction factors
Units
Fractional
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #15
Name
Atmospheric correction factors minimum
ParameterKey
COR_ATMOS.MIN
Description
Minimum of atmospheric correction factors
Units
Fractional
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
Parameter #16
Name
Atmospheric correction factors maximum
ParameterKey
COR_ATMOS.MAX
Description
Maximum of atmospheric correction factors
Units
Fractional
Structure
Size
9
Description
Dimensions: [Number_of_bandpass_wavelength_ranges] - where Number_of_bandpass_wavelength_ranges is the number of bandpass wavelength ranges.
Support
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