../ dmsp_15_ephemeris_20210915.txt 22-Jun-2023 00:48 109591 dmsp_16_ephemeris_20210915.txt 22-Jun-2023 00:48 109572 dmsp_17_ephemeris_20210915.txt 22-Jun-2023 00:48 109701 dmsp_18_ephemeris_20210915.txt 22-Jun-2023 00:48 109563