../ dmsp_15_ephemeris_20190331.txt 22-Jun-2023 16:30 108106 dmsp_16_ephemeris_20190331.txt 22-Jun-2023 16:30 108211 dmsp_17_ephemeris_20190331.txt 22-Jun-2023 16:30 108302 dmsp_18_ephemeris_20190331.txt 22-Jun-2023 16:30 108130