../ dmsp_15_ephemeris_20210920.txt 22-Jun-2023 00:48 109632 dmsp_16_ephemeris_20210920.txt 22-Jun-2023 00:48 109593 dmsp_17_ephemeris_20210920.txt 22-Jun-2023 00:48 109635 dmsp_18_ephemeris_20210920.txt 22-Jun-2023 00:48 109619