../ dmsp_15_ephemeris_20170420.txt 22-Jun-2023 16:48 109465 dmsp_16_ephemeris_20170420.txt 22-Jun-2023 16:48 109584 dmsp_17_ephemeris_20170420.txt 22-Jun-2023 16:48 109804 dmsp_18_ephemeris_20170420.txt 22-Jun-2023 16:48 109724