Radar measurements to investigate anomalous nighttime electron temperature and density variations from 200 km into the topside ionosphere. The experiment uses a sequence of pulse lengths to ascertain local conditions with the zenith antenna. Alternating 8-point MISA measurements at two elevation angles and at S, W, N, and E compass positions provide latitudinal and longitudinal context for the local variations seen. Coordinated radar and optical observations. Radar measurements taken in 10 directions will allow estimation of spatial gradients.
Clear weather is required.
Incoherent Scatter Coordinated Observation Days. This consists of combined local E and F region measurements, primarily for tidal studies. 22 Mar. The Local 10 Position Experiment will be run at night. This will include measurements taken in 10 directions to allow estimation of spatial gradients. Coordinated radar and optical observations of neutral winds and temperatures.