../ dmsp_15_ephemeris_20210408.txt 22-Jun-2023 16:29 108161 dmsp_16_ephemeris_20210408.txt 22-Jun-2023 16:29 108200 dmsp_17_ephemeris_20210408.txt 22-Jun-2023 16:29 108161 dmsp_18_ephemeris_20210408.txt 22-Jun-2023 16:29 108168