../ dmsp_15_ephemeris_20211027.txt 22-Jun-2023 00:48 109610 dmsp_16_ephemeris_20211027.txt 22-Jun-2023 00:48 109581 dmsp_17_ephemeris_20211027.txt 22-Jun-2023 00:48 109474 dmsp_18_ephemeris_20211027.txt 22-Jun-2023 00:48 109450