../ dmsp_15_ephemeris_20180708.txt 22-Jun-2023 00:37 109459 dmsp_16_ephemeris_20180708.txt 22-Jun-2023 00:37 109436 dmsp_17_ephemeris_20180708.txt 22-Jun-2023 00:37 109670 dmsp_18_ephemeris_20180708.txt 22-Jun-2023 00:37 109518