../ dmsp_15_ephemeris_20210907.txt 22-Jun-2023 00:48 109696 dmsp_16_ephemeris_20210907.txt 22-Jun-2023 00:48 109632 dmsp_17_ephemeris_20210907.txt 22-Jun-2023 00:48 109711 dmsp_18_ephemeris_20210907.txt 22-Jun-2023 00:48 109596