../ dmsp_15_ephemeris_20210302.txt 22-Jun-2023 00:46 108237 dmsp_16_ephemeris_20210302.txt 22-Jun-2023 00:46 108157 dmsp_17_ephemeris_20210302.txt 22-Jun-2023 00:46 108168 dmsp_18_ephemeris_20210302.txt 22-Jun-2023 00:46 108172