../ dmsp_15_ephemeris_20181115.txt 22-Jun-2023 16:54 109431 dmsp_16_ephemeris_20181115.txt 22-Jun-2023 16:54 109474 dmsp_17_ephemeris_20181115.txt 22-Jun-2023 16:54 109487 dmsp_18_ephemeris_20181115.txt 22-Jun-2023 16:54 109430