../ dmsp_15_ephemeris_20121211.txt 22-Jun-2023 00:21 109419 dmsp_16_ephemeris_20121211.txt 22-Jun-2023 00:21 109337 dmsp_17_ephemeris_20121211.txt 22-Jun-2023 00:21 109320 dmsp_18_ephemeris_20121211.txt 22-Jun-2023 00:21 109352