../ dmsp_15_ephemeris_20210802.txt 22-Jun-2023 00:47 109496 dmsp_16_ephemeris_20210802.txt 22-Jun-2023 00:47 109732 dmsp_17_ephemeris_20210802.txt 22-Jun-2023 00:47 109621 dmsp_18_ephemeris_20210802.txt 22-Jun-2023 00:47 109644