../ dmsp_15_ephemeris_20210223.txt 22-Jun-2023 00:46 108168 dmsp_16_ephemeris_20210223.txt 22-Jun-2023 00:46 108073 dmsp_17_ephemeris_20210223.txt 22-Jun-2023 00:46 107952 dmsp_18_ephemeris_20210223.txt 22-Jun-2023 00:46 108081