../ dmsp_15_ephemeris_20211130.txt 22-Jun-2023 16:37 109307 dmsp_16_ephemeris_20211130.txt 22-Jun-2023 16:37 109328 dmsp_17_ephemeris_20211130.txt 22-Jun-2023 16:37 109380 dmsp_18_ephemeris_20211130.txt 22-Jun-2023 16:37 109346