../ dmsp_15_ephemeris_20211119.txt 22-Jun-2023 00:49 109401 dmsp_16_ephemeris_20211119.txt 22-Jun-2023 00:49 109376 dmsp_17_ephemeris_20211119.txt 22-Jun-2023 00:49 109338 dmsp_18_ephemeris_20211119.txt 22-Jun-2023 00:49 109311