Index of /sp_phys/data/isis/ionogram_cdf/isis2/RES_75N_265E/1973/002
i2_av_res_1973002150533_v01.cdf
i2_av_res_1973002150547_v01.cdf
i2_av_res_1973002150630_v01.cdf
i2_av_res_1973002213701_v01.cdf