../ dmsp_15_ephemeris_20180825.txt 22-Jun-2023 00:38 109577 dmsp_16_ephemeris_20180825.txt 22-Jun-2023 00:38 109534 dmsp_17_ephemeris_20180825.txt 22-Jun-2023 00:38 109630 dmsp_18_ephemeris_20180825.txt 22-Jun-2023 00:38 109690