../ dmsp_15_ephemeris_20210721.txt 22-Jun-2023 00:47 109569 dmsp_16_ephemeris_20210721.txt 22-Jun-2023 00:47 109467 dmsp_17_ephemeris_20210721.txt 22-Jun-2023 00:47 109604 dmsp_18_ephemeris_20210721.txt 22-Jun-2023 00:47 109634