../ dmsp_15_ephemeris_20101217.txt 22-Jun-2023 00:16 109261 dmsp_16_ephemeris_20101217.txt 22-Jun-2023 00:16 109323 dmsp_17_ephemeris_20101217.txt 22-Jun-2023 00:16 109283 dmsp_18_ephemeris_20101217.txt 22-Jun-2023 00:16 109366