../ dmsp_15_ephemeris_20210912.txt 22-Jun-2023 00:48 109692 dmsp_16_ephemeris_20210912.txt 22-Jun-2023 00:48 109645 dmsp_17_ephemeris_20210912.txt 22-Jun-2023 00:48 109635 dmsp_18_ephemeris_20210912.txt 22-Jun-2023 00:48 109689