Summary
We report the first observations of simultaneous high-latitude interhemispheric F-region neutral wind fields by combining the 630 nm optical measurements from two scanning Doppler imagers (SDI) and three Fabry-Perot interferometers (FPI) for a period exceeding 5 hours. From the southern hemisphere, a SDI at Mawson and a FPI at Davis, both in Antarctica, were geomagnetically mapped onto the northern hemisphere. These data were combined in the northern hemisphere with a SDI at Longyearbyen, Svalbard, and two FPIs near Kiruna in Sweden and Sodankyla in Finland. Geomagnetic conditions were moderate and steady although the IMF Bz did change polarity several times. There was good agreement between the conjugate 630 nm optical intensities and wind vectors. All wind field vectors were overlaid onto the northern SuperDARN ion convection contours. The agreement between neutral and ion flow was remarkably good throughout the study interval, even down to meso-scale spatial size.