../ dmsp_15_ephemeris_20170501.txt 22-Jun-2023 00:34 109551 dmsp_16_ephemeris_20170501.txt 22-Jun-2023 00:34 109489 dmsp_17_ephemeris_20170501.txt 22-Jun-2023 00:34 109631 dmsp_18_ephemeris_20170501.txt 22-Jun-2023 00:34 109655