../ dmsp_15_ephemeris_20210729.txt 22-Jun-2023 00:47 109635 dmsp_16_ephemeris_20210729.txt 22-Jun-2023 00:47 109449 dmsp_17_ephemeris_20210729.txt 22-Jun-2023 00:47 109778 dmsp_18_ephemeris_20210729.txt 22-Jun-2023 00:47 109518