../ dmsp_15_ephemeris_20180819.txt 22-Jun-2023 00:38 109675 dmsp_16_ephemeris_20180819.txt 22-Jun-2023 00:38 109655 dmsp_17_ephemeris_20180819.txt 22-Jun-2023 00:38 109754 dmsp_18_ephemeris_20180819.txt 22-Jun-2023 00:38 109683