../ dmsp_15_ephemeris_20170530.txt 22-Jun-2023 16:49 109508 dmsp_16_ephemeris_20170530.txt 22-Jun-2023 16:49 109623 dmsp_17_ephemeris_20170530.txt 22-Jun-2023 16:49 109497 dmsp_18_ephemeris_20170530.txt 22-Jun-2023 16:49 109739