../ dmsp_15_ephemeris_20210724.txt 22-Jun-2023 16:36 109568 dmsp_16_ephemeris_20210724.txt 22-Jun-2023 16:36 109641 dmsp_17_ephemeris_20210724.txt 22-Jun-2023 16:36 109631 dmsp_18_ephemeris_20210724.txt 22-Jun-2023 16:36 109496