../ dmsp_15_ephemeris_20180502.txt 22-Jun-2023 00:37 109645 dmsp_16_ephemeris_20180502.txt 22-Jun-2023 00:37 109534 dmsp_17_ephemeris_20180502.txt 22-Jun-2023 00:37 109699 dmsp_18_ephemeris_20180502.txt 22-Jun-2023 00:37 109734