../ dmsp_15_ephemeris_20210824.txt 22-Jun-2023 16:36 109770 dmsp_16_ephemeris_20210824.txt 22-Jun-2023 16:36 109608 dmsp_17_ephemeris_20210824.txt 22-Jun-2023 16:36 109742 dmsp_18_ephemeris_20210824.txt 22-Jun-2023 16:36 109586