../ dmsp_15_ephemeris_20180528.txt 22-Jun-2023 00:37 109453 dmsp_16_ephemeris_20180528.txt 22-Jun-2023 00:37 109663 dmsp_17_ephemeris_20180528.txt 22-Jun-2023 00:37 109704 dmsp_18_ephemeris_20180528.txt 22-Jun-2023 00:37 109584