../ dmsp_15_ephemeris_20210928.txt 22-Jun-2023 00:48 109603 dmsp_16_ephemeris_20210928.txt 22-Jun-2023 00:48 109597 dmsp_17_ephemeris_20210928.txt 22-Jun-2023 00:48 109600 dmsp_18_ephemeris_20210928.txt 22-Jun-2023 00:48 109562