../ dmsp_15_ephemeris_20210308.txt 22-Jun-2023 00:46 108179 dmsp_16_ephemeris_20210308.txt 22-Jun-2023 00:46 108086 dmsp_17_ephemeris_20210308.txt 22-Jun-2023 00:46 108203 dmsp_18_ephemeris_20210308.txt 22-Jun-2023 00:46 108231