../ dmsp_15_ephemeris_20210909.txt 22-Jun-2023 17:03 109670 dmsp_16_ephemeris_20210909.txt 22-Jun-2023 17:03 109670 dmsp_17_ephemeris_20210909.txt 22-Jun-2023 17:03 109616 dmsp_18_ephemeris_20210909.txt 22-Jun-2023 17:03 109658