../ dmsp_15_ephemeris_20210908.txt 22-Jun-2023 16:30 109666 dmsp_16_ephemeris_20210908.txt 22-Jun-2023 16:30 109570 dmsp_17_ephemeris_20210908.txt 22-Jun-2023 16:30 109680 dmsp_18_ephemeris_20210908.txt 22-Jun-2023 16:30 109629