../ dmsp_15_ephemeris_20211104.txt 22-Jun-2023 00:48 109503 dmsp_16_ephemeris_20211104.txt 22-Jun-2023 00:48 109500 dmsp_17_ephemeris_20211104.txt 22-Jun-2023 00:48 109331 dmsp_18_ephemeris_20211104.txt 22-Jun-2023 00:48 109473