../ dmsp_15_ephemeris_20111220.txt 22-Jun-2023 16:12 109498 dmsp_16_ephemeris_20111220.txt 22-Jun-2023 16:12 109355 dmsp_17_ephemeris_20111220.txt 22-Jun-2023 16:12 109369 dmsp_18_ephemeris_20111220.txt 22-Jun-2023 16:12 109312