../ dmsp_15_ephemeris_20210430.txt 22-Jun-2023 00:46 109593 dmsp_16_ephemeris_20210430.txt 22-Jun-2023 00:46 109609 dmsp_17_ephemeris_20210430.txt 22-Jun-2023 00:46 109620 dmsp_18_ephemeris_20210430.txt 22-Jun-2023 00:46 109504