../ dmsp_15_ephemeris_20180505.txt 22-Jun-2023 00:37 109431 dmsp_16_ephemeris_20180505.txt 22-Jun-2023 00:37 109492 dmsp_17_ephemeris_20180505.txt 22-Jun-2023 00:37 109637 dmsp_18_ephemeris_20180505.txt 22-Jun-2023 00:37 109586