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Gold Level 1D 140, 152, and 156 nm Versus Altitude Occultation Plots

ResourceID
spase://NASA/DisplayData/GOLD/L1D/OCC_TanAlt/PT1080S

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. By choice GOLD is limited
to performing ~10 occultations a day for most of the year,
reducing the dayside mapping duty cycle by ~5%.

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Details

Version:2.3.1

DisplayData

ResourceID
spase://NASA/DisplayData/GOLD/L1D/OCC_TanAlt/PT1080S
ResourceHeader
ResourceName
Gold Level 1D 140, 152, and 156 nm Versus Altitude Occultation Plots
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. 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
Funding
Agency
National Aeronautics and Space Administration; Dr. Richard Eastes
Project
Explorer Program
AwardNumber
NNG19PQ28C
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Richard.Eastes
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/DisplayData/GOLD/L1D/OCC_TanAlt/PT1080S
spase://NASA/DisplayData/SES-14/GOLD/L1D/OCC_TanAlt/PT1080S
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
HTTPS from SPDF
URL
Description

Directory with GOLD plots.

Language
en
Format
PNG
Acknowledgement
The GOLD Team
ProviderName
The GOLD Team
ProviderResourceName
GOLD L1D Dayside disk plots
InstrumentIDs
MeasurementType
Profile
MeasurementType
ImageIntensity
TemporalDescription
TimeSpan
StartDate
2018-10-19 00:00:00
RelativeStopDate
-P1D
Cadence
PT900S
SpectralRange
Ultraviolet
ObservedRegion
Earth.NearSurface.Ionosphere
Caveats
Northern hemisphere and southern hemisphere images are separate. Cadence is irregular.
Keywords
GOLD
SES-14
Parameter #1
Name
Altitude
Description

The height of the pixel center from the Earth's crust.

Cadence
PT1080S
Units
km
ValidMin
-1000000000
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Direction
SupportQuantity
Positional
Parameter #2
Name
140 nm Counts
Description

The 140 nm count data.

Cadence
PT1080S
Units
counts
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #3
Name
152 nm Counts
Description

The 152 nm count data.

Cadence
PT1080S
Units
counts
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #4
Name
159 nm Counta
Description

The 159 nm count data.

Cadence
PT1080S
Units
counts
ValidMin
0
ValidMax
1000000000
FillValue
9.9692e+36
Support
Qualifier
Scalar
SupportQuantity
Other