../ dmsp_15_ephemeris_20121102.txt 22-Jun-2023 00:21 109530 dmsp_16_ephemeris_20121102.txt 22-Jun-2023 00:21 109403 dmsp_17_ephemeris_20121102.txt 22-Jun-2023 00:21 109522 dmsp_18_ephemeris_20121102.txt 22-Jun-2023 00:21 109508