Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Observations of omega bands using an imaging riometer.
AU - Kavanagh, A.J.
AU - Wild, J.A.
AU - Honary, F.
PY - 2009/11/6
Y1 - 2009/11/6
N2 - We present a case study of an omega band cur- rent system from 11 May 1998 using data from the Imaging Riometer for Ionospheric Studies (IRIS) in Finland. For the first time, images of a substorm-related omega band in cos- mic noise absorption are shown. The substorm in question was one of a string that occurred on that day; inspection of geostationary satellite data indicates that this was a sawtooth event. Using a previously established statistical relationship, the IRIS data is used to provide maps of Hall conductance and compared with previous estimates utilising both HF and VHF coherent-scatter radars. Discrepancies are discussed with reference to precipitation spectrum and the geometry of the experimental set-up. The imaging riometer data provides a higher spatial resolution than the combined magnetometer- radar pairing for determining the Hall conductance and can also be used to identify the extent of the precipitation in the absence of optical data.
AB - We present a case study of an omega band cur- rent system from 11 May 1998 using data from the Imaging Riometer for Ionospheric Studies (IRIS) in Finland. For the first time, images of a substorm-related omega band in cos- mic noise absorption are shown. The substorm in question was one of a string that occurred on that day; inspection of geostationary satellite data indicates that this was a sawtooth event. Using a previously established statistical relationship, the IRIS data is used to provide maps of Hall conductance and compared with previous estimates utilising both HF and VHF coherent-scatter radars. Discrepancies are discussed with reference to precipitation spectrum and the geometry of the experimental set-up. The imaging riometer data provides a higher spatial resolution than the combined magnetometer- radar pairing for determining the Hall conductance and can also be used to identify the extent of the precipitation in the absence of optical data.
KW - DCS-publications-id
KW - art-970
KW - DCS-publications-credits
KW - iono-fa
KW - iris
KW - samnet
KW - DCS-publications-personnel-id
KW - 9
KW - 104
KW - 5
U2 - 10.5194/angeo-27-4183-2009
DO - 10.5194/angeo-27-4183-2009
M3 - Journal article
VL - 27
SP - 4183
EP - 4195
JO - Annales Geophysicae
JF - Annales Geophysicae
SN - 0992-7689
IS - 11
ER -