../ dmsp_15_ephemeris_20111230.txt 22-Jun-2023 00:19 109301 dmsp_16_ephemeris_20111230.txt 22-Jun-2023 00:19 109181 dmsp_17_ephemeris_20111230.txt 22-Jun-2023 00:19 109395 dmsp_18_ephemeris_20111230.txt 22-Jun-2023 00:19 109444