../ dmsp_15_ephemeris_20181216.txt 22-Jun-2023 00:39 109379 dmsp_16_ephemeris_20181216.txt 22-Jun-2023 00:39 109363 dmsp_17_ephemeris_20181216.txt 22-Jun-2023 00:39 109177 dmsp_18_ephemeris_20181216.txt 22-Jun-2023 00:39 109135