../ dmsp_15_ephemeris_20180720.txt 22-Jun-2023 00:37 109419 dmsp_16_ephemeris_20180720.txt 22-Jun-2023 00:37 109611 dmsp_17_ephemeris_20180720.txt 22-Jun-2023 00:37 109596 dmsp_18_ephemeris_20180720.txt 22-Jun-2023 00:37 109631