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HomeSatelliteIonospheric ScintillationLatest Conditions Sunday, Dec 21 2014 08:28 UT
Ionospheric Scintillation

Updates: Every 10 minutes

Darwin (NT) Ionospheric Scintillation for the  last 24 hours.
DARWIN
(-12.443N, 130.956E)
Amplitude scintillation data for Darwin for the last 24 hours.
No Phase scintillation data for Darwin
Weipa (Qld) Ionospheric Scintillation for the last 24 hours.
WEIPA
(-12.678N, 141.920E)
Amplitude scintillation data for Weipa for the last 24 hours.
No Phase Scintillation data for Weipa
Willis Is (Qld) Ionospheric Scintillation for the last 24 hours.
WILLIS ISLAND
(-16.290N, 149.970E)
Amplitude scintillation data for Willis Is for the last 24 hours.
No Phase Scintillation data for Willis Is
Niue Ionospheric Scintillation for the last 24 hours.
NIUE
(-19.077N, 190.073E)
Amplitude scintillation data for Niue for the last 24 hours.
No Phase Scintillation data for Niue
Macquarie Island location
MACQUARIE ISLAND
(-54.499N, 158.936E)
Amplitude Scintillation data for Macquarie IslandPhase Scintillation data for Macquarie Island

The graphs on this page show ionospheric Scintillation indices over the last 24 hours, as measured by IPS Ionospheric Scintillation Monitor (ISM) sites. In each graph, the signal from each of the 31 active GPS satellites is shown with a different colour.

Graphs in the left hand column display amplitude scintillation, a measure of the short timescale fluctuation in the signal to noise. This is quantified by the S4 index. Values over ~0.6 indicate strong scintillation which can cause loss of lock on a GPS signal. A scintillation index below 0.3 is unlikely to have any affect on GPS. Amplitude scintillation seen in the Darwin and Weipa scintillation monitors is commonly due to an ionospheric phenomena called "plasma bubbles".

Graphs in the right hand column show phase scintillation, a measure of the short timescale fluctuation in the phase of the GPS signal. This is quantified by σ60, the standard deviation of the signal phase in radians, over 60 second intervals. Phase scintillation seen in the Macquarie Island scintillation monitor is generally a sign of auroral activity.

For more general information on ionospheric scintillation, please visit the About Ionospheric Scintillation page.

IPS provides a free email alert service for ionospheric scintillation, please visit the Ionospheric Scintillation Alert page to subscribe.

IPS operates a number of ISMs in the Australasian region, close to the southern equatorial anomaly, as well as in the sub-Antarctic region to the south of Australia. Locations of currently active IPS ISMs are indicated on the map below. Ionospheric Scintillation data from these instruments is available through the IPS World Data Centre.

IPS Ionospheric Scintillation Monitor (ISM) sites

Ionospheric scintillation products and services are under ongoing development, and your feedback is valuable to us. If you are experiencing problems with ionospheric scintillation in GPS receivers or satellite communications equipment, or have a suggestion on ways we may improve our scintillation-related services, please contact IPS.

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