Summary
We report the first observations of simultaneous high-latitude inter-hemispheric F-region neutral wind fields by combining the 630 nm optical measurements from two scanning Doppler imagers and three Fabry-Perot interferometers for a period exceeding 5 hours on 3 October 2008. From the southern hemisphere, a scanning Doppler imager at Mawson and a Fabry-Perot interferometer at Davis, both in Antarctica, are geomagnetically mapped onto the northern hemisphere. These data are combined in the northern hemisphere with a scanning Doppler imager at Longyearbyen, Svalbard, and two FabryPerot interferometers near Kiruna in Sweden and Sodankyla in Finland. Geomagnetic conditions were moderate (Kp = 3- - 3+) and steady although the interplanetary magnetic field Bz component did change polarity several times. There is good agreement between the conjugate 630 nm optical intensities and wind vectors where the two SDI’s fields of view overlap. All wind field vectors are overlaid onto the northern SuperDARN ion convection contours. Qualitatively, the agreement between neutral and ion flow is remarkably good throughout the study interval, even down to meso-scale spatial size.