../ dmsp_15_ephemeris_20210903.txt 22-Jun-2023 17:03 109613 dmsp_16_ephemeris_20210903.txt 22-Jun-2023 17:03 109698 dmsp_17_ephemeris_20210903.txt 22-Jun-2023 17:03 109697 dmsp_18_ephemeris_20210903.txt 22-Jun-2023 17:03 109697