../ dmsp_15_ephemeris_20181219.txt 22-Jun-2023 00:39 109302 dmsp_16_ephemeris_20181219.txt 22-Jun-2023 00:39 109437 dmsp_17_ephemeris_20181219.txt 22-Jun-2023 00:39 109323 dmsp_18_ephemeris_20181219.txt 22-Jun-2023 00:39 109296