Letter to the editor CUTLASS observations of a high-m ULF wave and its consequences for the DOPE HF Doppler sounder
whilst operating in a high spatial and temporal resolu-tion mode, has measured the ionospheric signature of a naturally occurring ULF wave in scatter artificially generated by the Tromsø Heater. The wave had a period of 100 s and exhibited curved phase fronts across the heated volume (about 180 km a...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1999
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.564.6488 http://www.ion.le.ac.uk/spear/pdf_files/WrightandYeoman1.pdf |
| Summary: | whilst operating in a high spatial and temporal resolu-tion mode, has measured the ionospheric signature of a naturally occurring ULF wave in scatter artificially generated by the Tromsø Heater. The wave had a period of 100 s and exhibited curved phase fronts across the heated volume (about 180 km along a single radar beam). Spatial information provided by CUTLASS has enabled an m-number for the wave of about 38 to be determined. This high-m wave was not detected by the IMAGE (International Monitor for Auroral Geomag-netic Eects) network of ground magnetometers, as expected for a wave of a small spatial scale size. These observations oer the first independent confirmation of the existence of the ground uncorrelated ULF wave signatures previously reported in measurements record-ed from an HF Doppler sounder located in the vicinity of Tromsø. These results both demonstrate a new capability for geophysical exploration from the com-bined CUTLASS-EISCAT ionospheric Heater experi-ment, and provide a verification of the HF Doppler technique for the investigation of small scale ULF waves. Key words. Ionosphere (ionosphere–magnetosphere interactions) á Magnetospheric physics (magnetosphere– |
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