../ dmsp_15_ephemeris_20210429.txt 22-Jun-2023 00:46 109650 dmsp_16_ephemeris_20210429.txt 22-Jun-2023 00:46 109633 dmsp_17_ephemeris_20210429.txt 22-Jun-2023 00:46 109648 dmsp_18_ephemeris_20210429.txt 22-Jun-2023 00:46 109589