Version:2.3.2
NumericalData
ResourceID
spase://ASWS/NumericalData/Ionogram/Woo_Ionogram
ResourceHeader
ResourceName
Australian Space Weather Services Woomera Ionogram
ReleaseDate
2021-03-29 17:14:50Z
Description
Ionograms are an image of frequency versus time delay (virtual height) of HF echoes from the ionosphere recorded by an ionosonde. An ionosonde is a swept frequency HF pulsed radar used to monitor the ionosphere. SWS WDC has archived ionogram data from 26 stations, 12 of them are still active at present. A vertical analog ionosonde had been installed at Woomera and sounded since 01/1962 to 07/1968. The vertical sounding ionosondes normally sweep in frequency from about 1.0 to 21.5 MHz. Frequency step resolution is 5 kHz, with up to 4095 steps available. The step interval is variable, becoming more coarse at higher frequencies as ionograms are generally displayed on a logarithmic scale. Every five minutes, a Ionogram data file was recorded. The raw ionogram is recorded in a film, which will be posted to Sydney SWS head office. SWS manually scaled and archived all ionogram films. There is no digital raw or clean ionogram data for Woomera. The Woomera scaled hourly ionospheric data is not available. The Woomera median data of foF2 and M(3000)F2 are available since 01/1962 to 07/1968.
Woomera station was closed in November 1985.
Acknowledgement
We are thankful to the Space Weather Network, Bureau of Meteorology of Australia for the observations of Woomera ionogram data.
Contacts
InformationURL
Name
Documentation (not with most browsers)
URL
Description
includes descriptions of data format of raw ionogram data, clean ionogram data and scaled data
Language
en
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
World Data Centre: Data Display and Download: Monthly Median Ionospheric Data
URL
Style
Search
Description
includes browse display interface, button to get the median data file and link to data availability chart
Language
en
Format
Text
Encoding
None
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
Access to Woomera median data of foF2 and M(3000)F2 data (not with most browsers)
URL
Description
Access to the median data of Woomera ionosondes. The station ID is 3460.
Language
en
Format
Binary
Encoding
ZIP
ProviderProcessingLevel
The manually scaled data is calibrated and the autoscaled data is uncalibrated.
InstrumentIDs
MeasurementType
Waves.Active
TemporalDescription
TimeSpan
StartDate
1962-01-01 00:00:00Z
StopDate
1968-07-31 00:00:00Z
Note
The earliest median ionospheric data since 01/1962.
SpectralRange
RadioFrequency
ObservedRegion
Earth.NearSurface.Ionosphere
Keywords
Ionogram
Ionospheric data
Ionosphere
Median ionospheric data
Hourly ionospheric data
Scaled parameters
Parameter #1
Name
Frequency
Description
Frequencies used to sonde ionopshere
Cadence
PT60M
Units
MHz
Wave
WaveType
Electromagnetic
Qualifier
Directional
Qualifier
Group
WaveQuantity
Frequency
FrequencyRange
SpectralRange
RadioFrequency
Low
1.0
High
21.5
Units
MHz
Parameter #2
Name
Virtual Height
Description
The apparent height of an ionospheric layer deduced from the time delay of a reflected radio pulse upon the assumption that it travelled at the speed of light over its entire path. However, the radio wave actually slows down as it is refracted so that the virtual height is greater than the true height of the refracting layer.
Cadence
PT60M
Units
km
ValidMin
50
ValidMax
1000
Mixed