../ dmsp_15_ephemeris_20121228.txt 22-Jun-2023 00:21 109485 dmsp_16_ephemeris_20121228.txt 22-Jun-2023 00:21 109268 dmsp_17_ephemeris_20121228.txt 22-Jun-2023 00:21 109274 dmsp_18_ephemeris_20121228.txt 22-Jun-2023 00:21 109330