../ dmsp_15_ephemeris_20210817.txt 22-Jun-2023 16:36 109547 dmsp_16_ephemeris_20210817.txt 22-Jun-2023 16:36 109577 dmsp_17_ephemeris_20210817.txt 22-Jun-2023 16:36 109651 dmsp_18_ephemeris_20210817.txt 22-Jun-2023 16:36 109635