../ dmsp_15_ephemeris_20210725.txt 22-Jun-2023 16:36 109578 dmsp_16_ephemeris_20210725.txt 22-Jun-2023 16:36 109651 dmsp_17_ephemeris_20210725.txt 22-Jun-2023 16:36 109681 dmsp_18_ephemeris_20210725.txt 22-Jun-2023 16:36 109428