../ dmsp_15_ephemeris_20121220.txt 22-Jun-2023 16:33 109492 dmsp_16_ephemeris_20121220.txt 22-Jun-2023 16:33 109239 dmsp_17_ephemeris_20121220.txt 22-Jun-2023 16:33 109280 dmsp_18_ephemeris_20121220.txt 22-Jun-2023 16:33 109261