../ dmsp_15_ephemeris_20210629.txt 22-Jun-2023 16:29 109633 dmsp_16_ephemeris_20210629.txt 22-Jun-2023 16:29 109615 dmsp_17_ephemeris_20210629.txt 22-Jun-2023 16:29 109668 dmsp_18_ephemeris_20210629.txt 22-Jun-2023 16:29 109411