../ dmsp_15_ephemeris_20180701.txt 22-Jun-2023 00:37 109484 dmsp_16_ephemeris_20180701.txt 22-Jun-2023 00:37 109478 dmsp_17_ephemeris_20180701.txt 22-Jun-2023 00:37 109525 dmsp_18_ephemeris_20180701.txt 22-Jun-2023 00:37 109589