../ dmsp_15_ephemeris_20180606.txt 22-Jun-2023 16:52 109448 dmsp_16_ephemeris_20180606.txt 22-Jun-2023 16:52 109474 dmsp_17_ephemeris_20180606.txt 22-Jun-2023 16:52 109645 dmsp_18_ephemeris_20180606.txt 22-Jun-2023 16:52 109504