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Detailed Reference Information
O’Neil et al. 1978
O’Neil, R.R., Newell, D., Ulwick, J.C., Stair, A.T., Shepherd, O., Reidy, W.P., Carpenter, J.W. and Davis, T.N. (1978). Excede 2 test, an artificial auroral experiment: Ground-based optical measurements. Journal of Geophysical Research 83: doi: 10.1029/JA083iA07p03281. issn: 0148-0227.

On April 13, 1975, a rocket-borne electron accelerator was launched from the Poker Flat Research Range near Fairbanks, Alaska. The launch, the second effort in the Excede series of artificial auroral experiments, was designated Excede 2 test. The pulsed accelerator operated for appoximately 100 s in the altitude range 106-135 km, providing a 3-kV electron beam with maximum currents of 10 A. A rocketborne retarding potential analyzer indicated that the charge buildup on the electron-emitting payload never exceede a positive potential of 200 V. Ground-based television systems and a dual channel telephotometer recorded the optical emissions induced in the night atmosphere by the rocket-borne accelerator. The ground-based telephotometer measured the time dependent emission profiles of the N2+1N(0-0) band a 3914 ¿ by energetic electrons at altitudes of approximately 110 km was determined to be equivalent to or greater than 3.2 ¿10-3. A value of 1.1 was measured for the steady state photon emission ratio of the O(1S)5577-¿ to N2+1 N (0-0) 3914-¿ emissions induced in the atmosphere at 110 km by the rocket-borne electron source. The ground-based telephotometer measurements have been corrected for the effects of atmospheric extinction by measuring the apparent stellar radiance of Vega.

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