../ dmsp_15_ephemeris_20111217.txt 22-Jun-2023 00:19 109397 dmsp_16_ephemeris_20111217.txt 22-Jun-2023 00:19 109278 dmsp_17_ephemeris_20111217.txt 22-Jun-2023 00:19 109309 dmsp_18_ephemeris_20111217.txt 22-Jun-2023 00:19 109502