SPASE version 2.2.3

Numerical Data Product: Australian Space Weather Forecasting Centre Casey Ionogram

Resource ID

spase://ASWS/NumericalData/Ionogram/Cas_Ionogram

Name

Australian Space Weather Forecasting Centre Casey Ionogram

Alternate name

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. The WDC has archived ionogram data from 30 stations, 12 of them are still active at present. An CADI (Canadian Advanced Digital Ionosonde) ionosonde has been sounding since 30/11/1999 at Casey and stopped on 18/02/2023. The CADI vertical sounding ionosondes normally sweep in frequency from about 1 to 20 MHz. Three standard sweeps are provided: low resolution (100 frequencies), medium resolution (200 frequencies), high resolution (400 frequencies). The step size may be selected to be linear or logarithmic. The step interval is variable, becoming more coarse at higher frequencies as ionograms are generally displayed on a logarithmic scale. Height range up to 512 km (to be increased to 1000 km) with 6 km resolution. Every five minutes, a Ionogram data file is recorded, cleaned and the cleaned ionogram is transferred to Sydney for autoscaling and further analysis. The raw ionogram file is recorded in a DVD monthly, which will be posted to Sydney every month. A 6A ionosonde has been sounding since 18/05/2023. The 6A vertical sounding ionosondes normally sweep in frequency from 1 to 22 MHz. Minimum frequency step resolution for the 6A is 5kHz, with up to 4200 frequency points available. The step interval is variable, starting from 25 kHz at 1 MHz and becoming more coarse at higher frequencies (100 kHz at 22 MHz) as ionograms are generally displayed on a logarithmic scale. Every five minutes, an Ionogram data file is recorded, cleaned and the cleaned ionogram is transferred to Sydney for autoscaling and further analysis. During 07/02/1993 to 08/10/2001, Casey also had an Lowell ionosonde. The WDC archives all raw ionogram files and cleaned ionogram files. The Casey digital clean ionogram data is available since 25/11/1997, and digital raw ionogram data since 07/02/1993. The Casey scaled hourly ionospheric data include parameters of foF2, foF1, FoE, foEs, fbEs, fmin, fxl, f'scaling F/s, M(3000)F2, h'F2, h'F, h'E, h'Es, h'Scaling R/S and Type Es. They are avalable since 01/01/1957. The Casey median data of foF2 and M(3000)F2 are available since 07/1957.

Additional information

World Data Centre: Data Display and Download: Hourly Ionospheirc Data

includes browse display interface, button to get yearly data file and link to data availability chart

Language

en

World Data Centre: Data Display and Download: Monthly Median Ionospheirc Data

includes browse display interface, button to get the median data file and link to data availability chart

Language

en

Documentation

includes descriptions of data format of raw ionogram data and clean ionogram data

Language

en

Software

Softwares to view clean ionogram data with scaling function

Language

en

Real Time Display

Online viewer of Real Time clean ionogram data

Language

en

Acknowledgement

We are thankful to the Australian Antarctica Division for the sounding of ionogram in the Casey station.

Contact

	Role	Person
1.	General contact	spase://SMWG/Person/Kehe.Wang
2.	Metadata contact	spase://SMWG/Person/Kehe.Wang

Release date

2016-06-21 17:00:00

Repository

Name

spase://SMWG/Repository/SWS

Availability

Online

Access rights

Open

URL

https access to raw and clean ionogram data

https access to the raw and clean ionogram data of Casey CADI ionosonde(cascd) and Lowell ionosonde(casey)

Language

en

Format

Binary

Encoding

None

Acknowledgement

Provider processing level

The original ionogram data are raw data, they are then cleaned by reducing noise signals at the station. The manually scaled data is calibrated and the autoscaled data is uncalibrated.

Instrument

spase://SMWG/Instrument/Ground/Casey/Ionosonde

Measurement type

Active waves

Temporal description

Start date

1957-01-01 00:00:00

Relative stop date

1 day ago

Note

The earliest hourly ionospheric data since 01/01/1957. Digital clean ionogram data are current to within a day.

Spectral range

RadioFrequency

Observed regions

Earth.NearSurface.Ionosphere

Caveats

Keywords

Hourly ionospheric data

Ionogram

Ionosphere

Ionospheric data

Median ionospheric data

Scaled parameters

Parameters