../ dmsp_15_ephemeris_20180822.txt 22-Jun-2023 00:38 109556 dmsp_16_ephemeris_20180822.txt 22-Jun-2023 00:38 109631 dmsp_17_ephemeris_20180822.txt 22-Jun-2023 00:38 109708 dmsp_18_ephemeris_20180822.txt 22-Jun-2023 00:38 109704