../ dmsp_15_ephemeris_20210522.txt 22-Jun-2023 16:29 109620 dmsp_16_ephemeris_20210522.txt 22-Jun-2023 16:29 109642 dmsp_17_ephemeris_20210522.txt 22-Jun-2023 16:29 109591 dmsp_18_ephemeris_20210522.txt 22-Jun-2023 16:29 109504