../ dmsp_15_ephemeris_20210715.txt 22-Jun-2023 16:36 109628 dmsp_16_ephemeris_20210715.txt 22-Jun-2023 16:36 109619 dmsp_17_ephemeris_20210715.txt 22-Jun-2023 16:36 109480 dmsp_18_ephemeris_20210715.txt 22-Jun-2023 16:36 109588