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Data Access
Virtual Solar Observatory
FITS
Search:
LASCO LZ data access
Search:
SOHO Science Archive
SOHO LASCO C2 Level 0.5 FITS Data
var authors='The LASCO Consortium: Naval Research Laboratory (USA); University of Birmingham (UK); Max-Planck-Institut für Aeronomie (Germany); Laboratoire d'Astronomie Spatiale (France)';
document.write(authors);
(1996).
SOHO LASCO C2 Level 0.5 FITS Data.
[Data set].
Solar Data Analysis Center; United States Naval Research Laboratory; European Space Astronomy Centre.
10.48322/8t0t-we11. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/SOHO/LASCO/C2/Level_05/PT12M
Description
The LASCO C2 Raw FITS Data.
LASCO (Large Angle Spectroscopic Coronagraph) is comprised of three nested coronagraphs (C1, C2, and C3) that image the solar corona from 1.1--30 solar radii (C1: 1.1--3; C2: 1.5--6; and C3: 3--30). The inner coronagraph (C1) is a newly developed mirror version of the classic Lyot coronagraph without an external occulter, while the middle coronagraph (C2) and the outer one (C3) are externally occulted. C1 is equipped with a Fabry-Perot interferometer that can take monochromatic images over the whole field of view with a spectral resolution of 0.07 nm. By stepping the bandpass across a spectral line, line profiles and Doppler shifts can be derived from all 1024 x 1024 pixels simultaneously. With an equivalent pixel size of 5.6 arcsec, the spatial resolution of C1 is ~11 arcsec. The resolution is ~23 arcsec for C2, and 112 arcsec for C3. The calculated expected precision of the emission line measurements, for example, of the 637.4 nm Fe X line is 0.05 Km/s at 1.1 solar radii, 1.0 km/s at 2 solar radii, and 8.0 km/s at 3 solar radii, all for a 60 s exposure. All three devices use a 1024 x 1024 pixel CCD. The CCDs are passively cooled to 193 K, but can be heated above ambient temperatures to drive off condensed material. The readout rate is ~21 s for a full image, but any line on the CCD can be accessed within about 60 ms, the unwanted lines being dumped. The electronics box provides overall control, including observation programs and scheduling. An observation program can be scheduled to be run at an absolute time or just next in sequence. It can run for a certain number of iterations, an interval of time, or stop at an absolute time. The observation program tasks included, e.g., taking single images from one of the telescopes, a series of images through the three linear polarizers, and a sequence of images at a series of Fabry-Perot wavelength steps. The image processing tasks are primarily image compression, with seven different techniques being available. On average, the readout time should be ~6 minutes or about 200 images/day. This information is from the paper ``The Large Angle Spectroscopic Coronagraph (LASCO): Visible Light Coronal Imaging and Spectroscopy,'' by G. E. Brueckner et al. (Proceedings of the First SOHO Workshop, ESA SP-348, pp. 27-34, November 1992).
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/SOHO/LASCO/C2/Level_05/PT12M
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
SOHO LASCO C2 Level 0.5 FITS Data
DOI
10.48322/8t0t-we11
ReleaseDate
2026-07-21 12:07:15Z
RevisionHistory
RevisionEvent
ReleaseDate
2024-06-10 00:08:46Z
Note
Metadata created by SY
RevisionEvent
ReleaseDate
2025-06-11 14:53:55Z
Note
Added HelioViewerID to Extension
RevisionEvent
ReleaseDate
2025-07-25 00:08:46Z
Note
Updated HelioViewerID
RevisionEvent
ReleaseDate
2025-09-23 13:41:54Z
Note
Added DOI and updated release date TLK
RevisionEvent
ReleaseDate
2025-10-03 11:24:32Z
Note
Updated PublishedBy name to match ROR Registry. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB
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ReleaseDate
2025-12-04 13:31:29Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:28:03Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:07:15Z
Note
Added HelioData InformationURL. JWL
Description
The LASCO C2 Raw FITS Data.
LASCO (Large Angle Spectroscopic Coronagraph) is comprised of three nested coronagraphs (C1, C2, and C3) that image the solar corona from 1.1--30 solar radii (C1: 1.1--3; C2: 1.5--6; and C3: 3--30). The inner coronagraph (C1) is a newly developed mirror version of the classic Lyot coronagraph without an external occulter, while the middle coronagraph (C2) and the outer one (C3) are externally occulted. C1 is equipped with a Fabry-Perot interferometer that can take monochromatic images over the whole field of view with a spectral resolution of 0.07 nm. By stepping the bandpass across a spectral line, line profiles and Doppler shifts can be derived from all 1024 x 1024 pixels simultaneously. With an equivalent pixel size of 5.6 arcsec, the spatial resolution of C1 is ~11 arcsec. The resolution is ~23 arcsec for C2, and 112 arcsec for C3. The calculated expected precision of the emission line measurements, for example, of the 637.4 nm Fe X line is 0.05 Km/s at 1.1 solar radii, 1.0 km/s at 2 solar radii, and 8.0 km/s at 3 solar radii, all for a 60 s exposure. All three devices use a 1024 x 1024 pixel CCD. The CCDs are passively cooled to 193 K, but can be heated above ambient temperatures to drive off condensed material. The readout rate is ~21 s for a full image, but any line on the CCD can be accessed within about 60 ms, the unwanted lines being dumped. The electronics box provides overall control, including observation programs and scheduling. An observation program can be scheduled to be run at an absolute time or just next in sequence. It can run for a certain number of iterations, an interval of time, or stop at an absolute time. The observation program tasks included, e.g., taking single images from one of the telescopes, a series of images through the three linear polarizers, and a sequence of images at a series of Fabry-Perot wavelength steps. The image processing tasks are primarily image compression, with seven different techniques being available. On average, the readout time should be ~6 minutes or about 200 images/day. This information is from the paper ``The Large Angle Spectroscopic Coronagraph (LASCO): Visible Light Coronal Imaging and Spectroscopy,'' by G. E. Brueckner et al. (Proceedings of the First SOHO Workshop, ESA SP-348, pp. 27-34, November 1992).
PublicationInfo
Authors
The LASCO Consortium: Naval Research Laboratory (USA); University of Birmingham (UK); Max-Planck-Institut für Aeronomie (Germany); Laboratoire d'Astronomie Spatiale (France)
PublicationDate
1996-01-16 00:00:00Z
PublishedBy
Solar Data Analysis Center; United States Naval Research Laboratory; European Space Astronomy Centre
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Karl.Battams
2.
FormerPI
spase://SMWG/Person/Guenter.E.Brueckner
3.
FormerPI
spase://SMWG/Person/Russell.A.Howard
4.
HostContact
spase://SMWG/Person/Jack.Ireland
5.
MetadataContact
spase://SMWG/Person/Seiji.Yashiro
InformationURL
Name
The Large Angle Spectroscopic Coronagraph (LASCO)
URL
https://doi.org/10.1007/BF00733434
Description
The LASCO Instrument paper
InformationURL
URL
https://lasco-www.nrl.navy.mil/
Description
The LASCO website
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/SOHO_LASCO_C2_Level_05_PT12M
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VSPO/NumericalData/P_SOHO_HDR_LASCO_INTENS
spase://VSPO/NumericalData/SOHO/LASCO/PT5M
spase://NASA/NumericalData/SOHO/LASCO/PT5M
spase://NASA/NumericalData/SOHO/LASCO/VSO_SDAC
AccessInformation
RepositoryID
spase://SMWG/Repository/SDAC
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
Virtual Solar Observatory
URL
https://sdac.virtualsolar.org/cgi/search?time=1&inst_only=1&version=current&build=1&instrument=LASCO
AccessURL
URL
https://umbra.nascom.nasa.gov/pub/lasco_level05/
Description
The LASCO Raw (level 0.5) FITS data archive at NASA SDAC. The date folders are the YYMMDD format.
Format
FITS
AccessInformation
RepositoryID
spase://SMWG/Repository/NRL
Availability
Online
AccessRights
Open
AccessURL
Name
LASCO LZ data access
URL
https://lasco-www.nrl.navy.mil/index.php?p=get_data
Style
Search
Format
FITS
AccessInformation
RepositoryID
spase://ESA/Repository/SOHOScienceArchive
Availability
Online
AccessRights
Open
AccessURL
Name
SOHO Science Archive
URL
https://ssa.esac.esa.int/ssa/#/pages/search
Style
Search
Format
FITS
ProcessingLevel
Raw
ProviderVersion
Level 0.5 (Raw)
InstrumentIDs
spase://SMWG/Instrument/SOHO/LASCO
MeasurementType
ImageIntensity
TemporalDescription
TimeSpan
StartDate
1995-12-08 00:00:00Z
RelativeStopDate
-P2M
Note
Data are current to within about two months.
Cadence
PT12M
ObservedRegion
Sun
ObservedRegion
Sun.Corona
Parameter #1
Name
Brightness
Units
DN (Data Number)
Wave
WaveType
Photon
WaveQuantity
Intensity
Extension
HelioViewerID
4