../ dmsp_15_ephemeris_20210709.txt 22-Jun-2023 16:36 109528 dmsp_16_ephemeris_20210709.txt 22-Jun-2023 16:36 109506 dmsp_17_ephemeris_20210709.txt 22-Jun-2023 16:36 109603 dmsp_18_ephemeris_20210709.txt 22-Jun-2023 16:36 109619