../ dmsp_15_ephemeris_20171214.txt 22-Jun-2023 16:51 109415 dmsp_16_ephemeris_20171214.txt 22-Jun-2023 16:51 109317 dmsp_17_ephemeris_20171214.txt 22-Jun-2023 16:51 109281 dmsp_18_ephemeris_20171214.txt 22-Jun-2023 16:51 109281