../ dmsp_15_ephemeris_20210701.txt 22-Jun-2023 16:36 109463 dmsp_16_ephemeris_20210701.txt 22-Jun-2023 16:36 109464 dmsp_17_ephemeris_20210701.txt 22-Jun-2023 16:36 109582 dmsp_18_ephemeris_20210701.txt 22-Jun-2023 16:36 109564