../ dmsp_15_ephemeris_20210902.txt 22-Jun-2023 00:48 109547 dmsp_16_ephemeris_20210902.txt 22-Jun-2023 00:48 109678 dmsp_17_ephemeris_20210902.txt 22-Jun-2023 00:48 109635 dmsp_18_ephemeris_20210902.txt 22-Jun-2023 00:48 109594