../ dmsp_15_ephemeris_20210831.txt 22-Jun-2023 00:48 109700 dmsp_16_ephemeris_20210831.txt 22-Jun-2023 00:48 109674 dmsp_17_ephemeris_20210831.txt 22-Jun-2023 00:48 109713 dmsp_18_ephemeris_20210831.txt 22-Jun-2023 00:48 109685