../ dmsp_15_ephemeris_20180915.txt 22-Jun-2023 16:53 109678 dmsp_16_ephemeris_20180915.txt 22-Jun-2023 16:53 109630 dmsp_17_ephemeris_20180915.txt 22-Jun-2023 16:53 109683 dmsp_18_ephemeris_20180915.txt 22-Jun-2023 16:53 109718