../ dmsp_15_ephemeris_20180623.txt 22-Jun-2023 16:53 109480 dmsp_16_ephemeris_20180623.txt 22-Jun-2023 16:53 109489 dmsp_17_ephemeris_20180623.txt 22-Jun-2023 16:53 109651 dmsp_18_ephemeris_20180623.txt 22-Jun-2023 16:53 109493