../ dmsp_15_ephemeris_20210630.txt 22-Jun-2023 00:47 109470 dmsp_16_ephemeris_20210630.txt 22-Jun-2023 00:47 109586 dmsp_17_ephemeris_20210630.txt 22-Jun-2023 00:47 109575 dmsp_18_ephemeris_20210630.txt 22-Jun-2023 00:47 109501