../ dmsp_15_ephemeris_20180720.txt 22-Jun-2023 16:53 109419 dmsp_16_ephemeris_20180720.txt 22-Jun-2023 16:53 109611 dmsp_17_ephemeris_20180720.txt 22-Jun-2023 16:53 109596 dmsp_18_ephemeris_20180720.txt 22-Jun-2023 16:53 109631