../ dmsp_15_ephemeris_20210315.txt 22-Jun-2023 00:46 108211 dmsp_16_ephemeris_20210315.txt 22-Jun-2023 00:46 108192 dmsp_17_ephemeris_20210315.txt 22-Jun-2023 00:46 108156 dmsp_18_ephemeris_20210315.txt 22-Jun-2023 00:46 108099