Investigations of Space Weather and the Mesosphere using the TIGER Radar
The Tasman International Geospace Environment Radar (TIGER) is an over-the-horizon radar that locates ionospheric structures in the region between Tasmania and Antarctica, measuring their velocities. Compared with other similar (SuperDARN) radars, TIGER is uniquely sited to detect phenomena occurrin...
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Australian Antarctic Data Centre
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| Online Access: | https://researchdata.ands.org.au/investigations-space-weather-tiger-radar/699637 https://data.aad.gov.au/metadata/records/ASAC_1246 http://nla.gov.au/nla.party-617536 |
| Summary: | The Tasman International Geospace Environment Radar (TIGER) is an over-the-horizon radar that locates ionospheric structures in the region between Tasmania and Antarctica, measuring their velocities. Compared with other similar (SuperDARN) radars, TIGER is uniquely sited to detect phenomena occurring in the region equatorward of the normal auroral oval. This project exploits this advantage to study the physical processes generating phenomena that are poorly understood, such as sub-auroral convection flows and the regeneration of the plasmapause after magnetic storms. Results are important for developing improved space weather predictions necessary, for example, for communications and satellite navigation systems. The data comes in two forms DAT files and FIT files. The FIT files are reasonably versatile, and smaller, and are stored online, but have not yet made them available outside IPS. Data are available on request to IPS (Kehe Wang), and will be made available via FTP. The radar has been operating since November 1999. Project objectives: The project objectives, as stated in the project application round 2008/09, appear below: The fundamental objective of the TIGER project is to study and understand, crucial outstanding problems in the physics of the outermost part of our environmental envelope (Geospace) - problems that are of scientific importance and fundamental to improving space weather predictions. The TIGER radar will be used to investigate: 1. the dynamics of the auroral oval; 2. sub-auroral convection flows; 3. the dynamics of the plasmapause during sub-storm activity; 4. coupling between the dayside and nightside of the magnetosphere; 5. generation of travelling ionospheric disturbances (TIDs) and their propagation to, and energy deposition at, mid-latitudes over Australia; 6. the development of reliable prediction/nowcasting techniques of real benefit to Australian HF users; 7. mesospheric winds; 8. the sea state. TIGER will provide real-time data for: 1. mesospheric winds above the Southern Ocean region; 2. real-time maps of ionospheric convection in the southern hemisphere; 3. surface wind direction across the Southern Ocean. An important new aspect of this proposal is the addition of the second TIGER radar, TIGER/Unwin, that is located near Invercargill, New Zealand, and which will begin operations late 2004. Taken from the 2008-2009 Progress Report: Progress against objectives: The TIGER radar at Bruny Island has operated continuously for over 95% of the time during the last year. Special campaigns are run for approximately one week each month during SuperDARN Discretionary Time periods, the remainder of the time TIGER operates in synchronism with all other SuperDARN radars during SuperDARN Common Time periods. Data is now transferred via satellite from Bruny to the La Trobe TIGER data server. Data is still backed up on hard disk at the radar site until storage and backup on the TIGER server is confirmed. During Discretionary time special campaign modes have been run to study PMSE, sea-state, micropulsations, and the scattering processes that generate the ionospheric echoes detected by the TIGER radars. Many of these campaigns have been coordinated with similar operations of the TIGER Unwin radar located in NZ and some used the phasing box that swings the TIGER Bruny radar footprint over Macquarie Island to give coincidence measurements with the ionosonde and magnetometer instruments at Macquarie Island. For the 2008-09 summer, arrangements were again made for the all the southern hemisphere SuperDARN radars to operate a Common Time mode most suited to the detection of PMSE. This is particularly important for collaborative PMSE studies with the VHF radar and other instruments at Davis. Several major research projects have been completed and the work published and presented at national and international scientific meetings. This includes projects conducted by other members of the TIGER consortium who are not investigators on this specific project. In the past year results have been published or reported at conferences on the dynamics of the auroral oval; coupling from the nightside magnetosphere to aurora in the Harang discontinuity region, sub-auroral convection flows. Other science topics listed in the objectives have been studied and reported in previous years. Taken from the 2009-2010 Progress Report: Public summary of the season progress The Tasman International Geospace Environment Radar (TIGER) is a dual, over-the-horizon radar system that locates ionospheric structures, meteors and sea echoes in the region between Tasmania-NZ and Antarctica. In the last year observations of motions in the auroral and sub-auroral ionosphere have been used to study the evolution of space weather systems and to identify the causes of phenomena not previously understood. Results contribute to improving space weather predictions necessary, for example, to support communications, satellite navigation systems such as GPS and the Jindalee Over-The-Horizon Radar system that provides surveillance of Australia's coastline. |
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