../ dmsp_15_ephemeris_20210623.txt 22-Jun-2023 00:47 109638 dmsp_16_ephemeris_20210623.txt 22-Jun-2023 00:47 109508 dmsp_17_ephemeris_20210623.txt 22-Jun-2023 00:47 109534 dmsp_18_ephemeris_20210623.txt 22-Jun-2023 00:47 109489