../ dmsp_15_ephemeris_20210423.txt 22-Jun-2023 00:46 109569 dmsp_16_ephemeris_20210423.txt 22-Jun-2023 00:46 109642 dmsp_17_ephemeris_20210423.txt 22-Jun-2023 00:46 109664 dmsp_18_ephemeris_20210423.txt 22-Jun-2023 00:46 109513