../ dmsp_15_ephemeris_20180915.txt 22-Jun-2023 00:38 109678 dmsp_16_ephemeris_20180915.txt 22-Jun-2023 00:38 109630 dmsp_17_ephemeris_20180915.txt 22-Jun-2023 00:38 109683 dmsp_18_ephemeris_20180915.txt 22-Jun-2023 00:38 109718