../ dmsp_15_ephemeris_20180908.txt 22-Jun-2023 16:29 109588 dmsp_16_ephemeris_20180908.txt 22-Jun-2023 16:29 109650 dmsp_17_ephemeris_20180908.txt 22-Jun-2023 16:29 109655 dmsp_18_ephemeris_20180908.txt 22-Jun-2023 16:29 109677