../ dmsp_15_ephemeris_20170430.txt 22-Jun-2023 00:34 109579 dmsp_16_ephemeris_20170430.txt 22-Jun-2023 00:34 109626 dmsp_17_ephemeris_20170430.txt 22-Jun-2023 00:34 109721 dmsp_18_ephemeris_20170430.txt 22-Jun-2023 00:34 109681