../ dmsp_15_ephemeris_20211112.txt 22-Jun-2023 16:37 109401 dmsp_16_ephemeris_20211112.txt 22-Jun-2023 16:37 109469 dmsp_17_ephemeris_20211112.txt 22-Jun-2023 16:37 109423 dmsp_18_ephemeris_20211112.txt 22-Jun-2023 16:37 109444