../ dmsp_15_ephemeris_20181223.txt 22-Jun-2023 00:39 109393 dmsp_16_ephemeris_20181223.txt 22-Jun-2023 00:39 109290 dmsp_17_ephemeris_20181223.txt 22-Jun-2023 00:39 109338 dmsp_18_ephemeris_20181223.txt 22-Jun-2023 00:39 109302