../ dmsp_15_ephemeris_20210813.txt 22-Jun-2023 17:03 109594 dmsp_16_ephemeris_20210813.txt 22-Jun-2023 17:03 109548 dmsp_17_ephemeris_20210813.txt 22-Jun-2023 17:03 109602 dmsp_18_ephemeris_20210813.txt 22-Jun-2023 17:03 109612