../ dmsp_15_ephemeris_20200408.txt 22-Jun-2023 00:43 108283 dmsp_16_ephemeris_20200408.txt 22-Jun-2023 00:43 108222 dmsp_17_ephemeris_20200408.txt 22-Jun-2023 00:43 108254 dmsp_18_ephemeris_20200408.txt 22-Jun-2023 00:43 108210