Version:2.3.1
NumericalData
ResourceID
spase://NASA/NumericalData/GOLD/L1C/OCC/PT0.3S
ResourceHeader
ResourceName
Gold Level 1C Occultation data
ReleaseDate
2020-09-14 16:47:17Z
Description
The Level 1C Dayside Disk Images are interrupted via stored instrument commands when
target stars suitable for occultation measurements approach either limb.
To perform the occultation measurement, the slit mechanism inserts the 1 degree wide occultation (OCC)
slit at the spectrometer focal plane, and the scan mirrors slew the Field of View to the star.
The mirror is centered at a 225 km tangent point altitude. Occultations require 6 minutes to
execute (30 seconds to configure the instrument, 30 seconds for uncertainty in timing and pointing,
4 minutes for the actual occultation, 30 seconds for uncertainty in timing and pointing, and 30
seconds to return to HR slit). Once the occultation is complete, the HR slit is inserted, the scan
mirror returns to its departure point in the original mapping observation, and Dayside Disk Image is
resumed. By choice GOLD is limited to performing ~10 occultations a day for most of the year,
reducing the dayside mapping duty cycle by ~5%.
Acknowledgement
National Aeronautics and Space Administration; Dr. Richard Eastes
Contacts
InformationURL
Name
GOLD Homepage web page
URL
Description
GOLD web page with news and other information.
InformationURL
Name
GOLD Missions Space Science Reviews Article
URL
Description
Eastes, R.W., McClintock, W.E., Burns, A.G. et al. Space Sci. Rev. (2017) vol. 212, pp.383.
PriorIDs
spase://VSPO/NumericalData/GOLD/L1C/OCC/PT0.3S
spase://NASA/NumericalData/SES-14/GOLD/L1C/OCC/PT0.3S
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description
FTPS access to Gold Level 1C data
AccessURL
Name
HTTPS from SPDF
URL
Description
HTTPS access to Gold Level 1C data
Format
NetCDF
Acknowledgement
Space Physics Data Facility of the NASA Goddard Space Flight Center; Robert E McGuire
ProcessingLevel
Calibrated
ProviderName
GOLD
ProviderResourceName
Gold Level 1C Day Disk data
ProviderProcessingLevel
Level 1C
ProviderVersion
1
InstrumentIDs
MeasurementType
ImageIntensity
TemporalDescription
TimeSpan
StartDate
2018-10-19 00:00:00
RelativeStopDate
P1D
Cadence
PT0.3S
ObservedRegion
Earth.NearSurface.Ionosphere
Keywords
Occultation data
GOLD
SES-14
Parameter #1
Name
ET time
ParameterKey
TIME_ET
Description
TDB seconds from January 1, 2000, 11:58:55.816 UTC at start of L1B time bin.
Cadence
PT0.3S
Units
Seconds
Structure
ValidMin
0
ValidMax
1893456004
FillValue
9.9692e+36
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #2
Name
UTC time
ParameterKey
TIME_UTC
Description
UTC date/time string: "2017-06-21T23:46:38.015Z".
Cadence
PT0.3S
Units
date/time
Structure
ValidMin
'1970-01-01T00:00:00Z'
ValidMax
'2150-01-01T00:00:00Z'
Support
Qualifier
Magnitude
SupportQuantity
Temporal
Parameter #3
Name
L1B time per grid
ParameterKey
L1B_TIME_BINS_PER_GRID
Description
The number of L1B dwells in each L1C pixel.
Cadence
PT0.3S
Units
counts
Structure
ValidMin
0
ValidMax
65535
FillValue
65535
Support
Qualifier
Magnitude
SupportQuantity
Other
Parameter #4
Name
L1B pixels per grid
ParameterKey
L1B_PIXELS_PER_GRID
Description
The number of L1B pixels in each L1C pixel.
Cadence
PT0.3S
Units
counts
Structure
ValidMin
0
ValidMax
65535
FillValue
65535
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #5
Name
Quality flag
ParameterKey
QUALITY_FLAG
Description
Cadence
PT0.3S
Units
counts
Structure
ValidMin
0
ValidMax
4294967295
FillValue
4294967295
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #6
Name
Wavelength
ParameterKey
WAVELENGTH
Description
The wavelengths at each row.
Cadence
PT0.3S
Units
nm
Structure
ValidMin
0
ValidMax
400
FillValue
NaN
Wave
WaveType
Photon
Qualifier
Scalar
WaveQuantity
Wavelength
Parameter #7
Name
Raw Count
ParameterKey
RAW_COUNT
Description
The co-added raw count data.
Cadence
PT0.3S
Units
counts
Structure
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #8
Name
Raw count random uncertainty
ParameterKey
RAW_COUNT_RANDOM_UNC
Description
The random uncertainty of the raw counts.
Cadence
PT0.3S
Units
counts
Structure
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #9
Name
Corrected count
ParameterKey
CORRECTED_COUNT
Description
The co-added corrected counts.
Cadence
PT0.3S
Units
counts
Structure
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #10
Name
Corrected count systematic uncertainty
ParameterKey
CORRECTED_COUNT_SYSTEMATIC_UNC
Description
Systematic uncertainty of the corrected counts.
Cadence
PT0.3S
Units
counts
Structure
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #11
Name
Corrected count random uncertainty
ParameterKey
CORRECTED_COUNT_RANDOM_UNC
Description
Random uncertainty of the corrected counts.
Cadence
PT0.3S
Units
counts
Structure
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #12
Name
Radiance
ParameterKey
RADIANCE
Description
The spectral radiance at each grid position.
Cadence
PT0.3S
Units
Rayleighs/nm
Structure
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #13
Name
Radiance systematic uncertainty
ParameterKey
RADIANCE_SYSTEMATIC_UNC
Description
The spectral radiance systematic uncertainty.
Cadence
PT0.3S
Units
Rayleighs/nm
Structure
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #14
Name
Radiance random uncertainty
ParameterKey
RADIANCE_RANDOM_UNC
Description
The spectral radiance random uncertainty.
Cadence
PT0.3S
Units
Rayleighs/nm
Structure
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Uncertainty
SupportQuantity
Other
Parameter #15
Name
Background counts
ParameterKey
BACKGROUND_COUNTS
Description
The background counts subtracted in the background correction.
Cadence
PT0.3S
Units
counts
Structure
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #16
Name
Reference point latitude
ParameterKey
REFERENCE_POINT_LAT
Description
Latitude of the reference point.
Cadence
PT0.3S
Units
degrees
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
Structure
ValidMin
0
ValidMax
360
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #17
Name
Reference point longitude
ParameterKey
REFERENCE_POINT_LON
Description
Longitude of the reference point.
Cadence
PT0.3S
Units
degrees
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
Structure
ValidMin
-180
ValidMax
180
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #18
Name
Tangent Height
ParameterKey
TANGENT_HEIGHT
Description
The tangent height of the pixel center ray from the Earth's crust.
Cadence
PT0.3S
Units
km
Structure
ValidMin
-1000000000
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #19
Name
Ray solar phase angles
ParameterKey
RAY_SOLAR_PHASE_ANGLE
Description
The planar angle between the pixel ray from center and the sun direction.
Cadence
PT0.3S
Units
degrees
Structure
ValidMin
-360
ValidMax
360
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #20
Name
Ray nadir angle
ParameterKey
RAY_NADIR_ANGLE
Description
The planar angle between the pixel ray from center and the spacecraft nadir.
Cadence
PT0.3S
Units
degrees
Structure
ValidMin
-360
ValidMax
360
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #21
Name
Emission angle
ParameterKey
EMISSION_ANGLE
Description
The planar angle between the pixel ray from center and the normal to the reference point.
Cadence
PT0.3S
Units
degrees
Structure
ValidMin
0
ValidMax
180
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #22
Name
Solar zenith angle
ParameterKey
SOLAR_ZENITH_ANGLE
Description
The planar angle between the sun direction to the reference point and the normal to the reference point.
Cadence
PT0.3S
Units
degrees
Structure
ValidMin
0
ValidMax
180
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #23
Name
Star Tangent Height
ParameterKey
STAR_TANGENT_HEIGHT
Description
The tangent height of the reference star with respect to GOLD.
Cadence
PT0.3S
Units
km
Structure
ValidMin
-1000000000
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #24
Name
Solar zenith angle ????
ParameterKey
SOLAR_ZENITH_ANGLE_WRT_STAR
Description
The planar angle between the sun direction to the star tangent point normal.
Cadence
PT0.3S
Units
degrees
Structure
ValidMin
-360
ValidMax
360
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #25
Name
Star Tangent Latitude
ParameterKey
STAR_TANGENT_LAT
Description
Tangent point Latitude relative to fixed Earth frame of line to star.
Cadence
PT0.3S
Units
degrees
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
Structure
ValidMin
-180
ValidMax
180
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #26
Name
Star Tangent longitude
ParameterKey
STAR_TANGENT_LON
Description
Tangent point Longitude relative to fixed Earth frame of line to star.
Cadence
PT0.3S
Units
degrees
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
Structure
ValidMin
0
ValidMax
360
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional