../ dmsp_15_ephemeris_20180702.txt 22-Jun-2023 00:37 109500 dmsp_16_ephemeris_20180702.txt 22-Jun-2023 00:37 109534 dmsp_17_ephemeris_20180702.txt 22-Jun-2023 00:37 109712 dmsp_18_ephemeris_20180702.txt 22-Jun-2023 00:37 109621