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Data Access

Australian Space Weather Services Learmonth Observatory Spectrograms

ResourceID
spase://ASWS/DisplayData/Spectrograph/Lem_Spectrograph

Description

Culgoora and Learmonth Observatories dynamic spectrogram plots display frequency in MHz on the vertical axis and time in UT on the horizontal axis. The time span for each plot varies, generally spanning local day time hours with time resolution of 3 seconds. The frequency range is 18 - 1800 MHz for Culgoora spectrogams and 25 - 180 MHz for Learmonth spectrograms. The intensity values are color coded and are expressed as relative logarithmic units (0 to 255).
The Culgoora spectrograms consist of 4 frequency bands: 18-57, 57-180, 180-570 570 -1800 MHz
and Learmonth has 2 bands: 25-75, 75-180 MHz. The two Learmonth bands are each divided into 400 frequency steps.
Culgoora spectrograph data is available since November 1992, Learmonth data since June 2000.

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Details

Version:2.3.2

DisplayData

ResourceID
spase://ASWS/DisplayData/Spectrograph/Lem_Spectrograph
ResourceHeader
ResourceName
Australian Space Weather Services Learmonth Observatory Spectrograms
ReleaseDate
2021-03-29 17:14:50Z
Description

Culgoora and Learmonth Observatories dynamic spectrogram plots display frequency in MHz on the vertical axis and time in UT on the horizontal axis. The time span for each plot varies, generally spanning local day time hours with time resolution of 3 seconds. The frequency range is 18 - 1800 MHz for Culgoora spectrogams and 25 - 180 MHz for Learmonth spectrograms. The intensity values are color coded and are expressed as relative logarithmic units (0 to 255).
The Culgoora spectrograms consist of 4 frequency bands: 18-57, 57-180, 180-570 570 -1800 MHz
and Learmonth has 2 bands: 25-75, 75-180 MHz. The two Learmonth bands are each divided into 400 frequency steps.
Culgoora spectrograph data is available since November 1992, Learmonth data since June 2000.

Acknowledgement
We are thankful to the Culgoora and Learmonth observatories of Space Weather Network, Bureau of Meteorology of Australia for the observations of Culgoora and Learmonth Spectrograph data.
Contacts
RolePersonStartDateStopDateNote
1.GeneralContactspase://ASWS/Person/Kehe.Wang
2.MetadataContactspase://ASWS/Person/Kehe.Wang
InformationURL
Name
Documentation
URL
https://downloads.sws.bom.gov.au/wdc/wdc_spec/doc/
Description

includes descriptions of Observation Log format, data format

Language
en
InformationURL
Name
Software
URL
https://downloads.sws.bom.gov.au/wdc/wdc_tools/solar_viewers/spectrograph/
Description

WDC Tools Solar Viewers

Language
en
AccessInformation
RepositoryID
spase://SMWG/Repository/SWS
Availability
Online
AccessRights
Open
AccessURL
Name
World Data Centre: Data Display and Download: Spectrograph
URL
https://www.sws.bom.gov.au/World_Data_Centre/1/9
Style
Search
Description

includes browse display interface, and link to data availability chart

Language
en
AccessURL
Name
Real Time Display
URL
https://www.sws.bom.gov.au/Solar/3/2/1
Style
File
Description

Real Time display of spectrograph (18-180 MHz) during daylight hours in Learmonth

Language
en
AccessURL
Name
Access to dynamic spectra plots (not with most browsers)
URL
https://downloads.sws.bom.gov.au/wdc/wdc_spec/
Style
Listing
Description

Access to the GIF images, thumbnails, event logs and raw data files

Language
en
Format
GIF
Encoding
None
InstrumentIDs
spase://ASWS/Instrument/Ground/Learmonth/Radiospectrograph
MeasurementType
Waves.Passive
TemporalDescription
TimeSpan
StartDate
2000-06-16 05:00:00Z
RelativeStopDate
-P2D
Note
Data are current to within a day or two.
DisplayCadence
PT12H
ObservedRegion
Sun
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Heliosphere.Inner
ObservedRegion
Heliosphere.Outer
Caveats
The time span for each plot varies, generally spanning daylight hours.
Keywords
Dynamic Spectrogram
Spectrogram
Solar radio burst
Type II Solar radio burst
Type III Solar radio burst
Type IV Solar radio burst
Transmitter
Jovian Decametric Radiation
Parameter #1
Name
Relative counts
Description

The intensity values are color coded and are expressed as relative logarithmic units (0 to 255).

Cadence
PT12H
Wave
WaveType
PlasmaWaves
Qualifier
Magnitude
Qualifier
Pseudo
WaveQuantity
ACElectricField
FrequencyRange
SpectralRange
RadioFrequency
Low
18
High
180
Units
MHz