../ dmsp_15_ephemeris_20210904.txt 22-Jun-2023 00:48 109699 dmsp_16_ephemeris_20210904.txt 22-Jun-2023 00:48 109636 dmsp_17_ephemeris_20210904.txt 22-Jun-2023 00:48 109660 dmsp_18_ephemeris_20210904.txt 22-Jun-2023 00:48 109529