../ dmsp_15_ephemeris_20211008.txt 22-Jun-2023 16:36 109603 dmsp_16_ephemeris_20211008.txt 22-Jun-2023 16:36 109550 dmsp_17_ephemeris_20211008.txt 22-Jun-2023 16:36 109640 dmsp_18_ephemeris_20211008.txt 22-Jun-2023 16:36 109539