../ dmsp_15_ephemeris_20210630.txt 22-Jun-2023 16:36 109470 dmsp_16_ephemeris_20210630.txt 22-Jun-2023 16:36 109586 dmsp_17_ephemeris_20210630.txt 22-Jun-2023 16:36 109575 dmsp_18_ephemeris_20210630.txt 22-Jun-2023 16:36 109501