../ dmsp_15_ephemeris_20181130.txt 22-Jun-2023 00:39 109506 dmsp_16_ephemeris_20181130.txt 22-Jun-2023 00:39 109400 dmsp_17_ephemeris_20181130.txt 22-Jun-2023 00:39 109312 dmsp_18_ephemeris_20181130.txt 22-Jun-2023 00:39 109302