../ dmsp_15_ephemeris_20190916.txt 22-Jun-2023 00:41 109671 dmsp_16_ephemeris_20190916.txt 22-Jun-2023 00:41 109594 dmsp_17_ephemeris_20190916.txt 22-Jun-2023 00:41 109597 dmsp_18_ephemeris_20190916.txt 22-Jun-2023 00:41 109481