../ dmsp_15_ephemeris_20211115.txt 22-Jun-2023 17:04 109508 dmsp_16_ephemeris_20211115.txt 22-Jun-2023 17:04 109344 dmsp_17_ephemeris_20211115.txt 22-Jun-2023 17:04 109344 dmsp_18_ephemeris_20211115.txt 22-Jun-2023 17:04 109430