../ dmsp_15_ephemeris_20220720.txt 22-Jun-2023 00:52 109504 dmsp_16_ephemeris_20220720.txt 22-Jun-2023 00:52 109636 dmsp_17_ephemeris_20220720.txt 22-Jun-2023 00:52 109718 dmsp_18_ephemeris_20220720.txt 22-Jun-2023 00:52 109496