../ dmsp_15_ephemeris_20110410.txt 22-Jun-2023 00:17 109669 dmsp_16_ephemeris_20110410.txt 22-Jun-2023 00:17 109744 dmsp_17_ephemeris_20110410.txt 22-Jun-2023 00:17 109691 dmsp_18_ephemeris_20110410.txt 22-Jun-2023 00:17 109874