FUV-VISIBLE PHOTOMETRIC IMAGING OF AURORAE

Photometric images of 130.4-, 337.1-, 391.4-, and 557.7-nm auroral air glow emissions are presented for November 16, 1980, and December 9, 19 81. Unique observations and new data reduction techniques allow 360-de grees imaging of the local auroral emissions on both days and a view o f spatial and temporal variability. The 1980 aurorae, one nonpulsating and one pulsating, are located in the morning sector. We find that th e 1980 diffuse, nonpulsating aurora was located < 75 km from the rocke t in a northern location with respect to the rocket and was produced b y electrons with a characteristic energy of 200-300 eV. The pulsating aurora was located > 75 km in a western location and was produced by e lectrons with a characteristic energy of 2-3 keV. Both the near (north ern) and far (western) aurorae had motion and size characteristics con sistent with northeasterly drift rates of 200-500 m s-1 and 30-50 km i n size, respectively. The 1981 flight observed a stable arc in the eve ning sector. The arc was produced by electrons with a characteristic e nergy of 1-3 keV and had a probable 1/e width of approximately 75 km. For both flights, the 557.7/391.4 and 337.1/391.4 ratios were approxim ately constant.