../ dmsp_15_ephemeris_20180923.txt 22-Jun-2023 16:53 109745 dmsp_16_ephemeris_20180923.txt 22-Jun-2023 16:53 109532 dmsp_17_ephemeris_20180923.txt 22-Jun-2023 16:53 109655 dmsp_18_ephemeris_20180923.txt 22-Jun-2023 16:53 109583