SPASE version 2.2.3

Numerical Data Product: Australian Space Weather Services Davis Ionogram

Resource ID

spase://ASWS/NumericalData/Ionogram/Dav_Ionogram

Name

Australian Space Weather Services Davis 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. SWS WDC has archived ionogram data from 30 stations, 12 of them are still active at present. An Lowell Digisonde-Portable-Sounder-4D (DPS4D) has been sounding since 18/12/2001 at Davis. The Lowell vertical sounding ionosondes normally sweep in frequency from about 0.5 to 30 MHz. Frequency step is selectable to 1kHz. The step interval is variable, becoming more coarse at higher frequencies as ionograms are generally displayed on a logarithmic scale. Every ten minutes, a Ionogram data file is recorded, cleaned and the cleaned ionogram is transfered to SWS Sydney head office for autoscaling and further analysis. The raw ionogram file is recorded in a DVD monthly, which will be posted to Sydney SWS head office every month. During 02/06/1994 to 06/01/2000, Davis also had an IPS 4D ionosonde, and during 07/02/2000 to 01/12/2001, an IPS 5D ionosonde. After about 22.5 years services, the Lowell ionosonde has been offline after 11/04/2024. The WDC archives all raw ionogram files and cleaned ionogram files. The Davis digital clean ionogram data is available since 01/08/1994, and digital raw ionogram data since 02/06/1994. The Davis 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 01/01/1985. The Davis median data of foF2 and M(3000)F2 are available since 03/1985.

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 Davis 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

FTP access to raw and clean ionogram data

FTP access to the raw and clean ionogram data of Davis IPS 4D (dav4d), and IPS 5D (dav5d) ionosondes and Lowell ionosonde (davis)

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://ASWS/Instrument/Ground/Davis/Ionosonde

Measurement type

Active waves

Temporal description

Start date

1985-01-01 00:00:00

Relative stop date

1 day ago

Note

The earliest hourly ionospheric data since 01/01/1985. 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