../ dmsp_15_ephemeris_20181224.txt 22-Jun-2023 00:39 109422 dmsp_16_ephemeris_20181224.txt 22-Jun-2023 00:39 109307 dmsp_17_ephemeris_20181224.txt 22-Jun-2023 00:39 109234 dmsp_18_ephemeris_20181224.txt 22-Jun-2023 00:39 109187