../ dmsp_15_ephemeris_20200729.txt 22-Jun-2023 00:44 109596 dmsp_16_ephemeris_20200729.txt 22-Jun-2023 00:44 109421 dmsp_17_ephemeris_20200729.txt 22-Jun-2023 00:44 109575 dmsp_18_ephemeris_20200729.txt 22-Jun-2023 00:44 109607