../ dmsp_15_ephemeris_20121104.txt 22-Jun-2023 00:21 109539 dmsp_16_ephemeris_20121104.txt 22-Jun-2023 00:21 109408 dmsp_17_ephemeris_20121104.txt 22-Jun-2023 00:21 109472 dmsp_18_ephemeris_20121104.txt 22-Jun-2023 00:21 109430