../ dmsp_15_ephemeris_20191209.txt 22-Jun-2023 16:58 109554 dmsp_16_ephemeris_20191209.txt 22-Jun-2023 16:58 109356 dmsp_17_ephemeris_20191209.txt 22-Jun-2023 16:58 109283 dmsp_18_ephemeris_20191209.txt 22-Jun-2023 16:58 109209