../ dmsp_15_ephemeris_20210930.txt 22-Jun-2023 00:48 109596 dmsp_16_ephemeris_20210930.txt 22-Jun-2023 00:48 109641 dmsp_17_ephemeris_20210930.txt 22-Jun-2023 00:48 109702 dmsp_18_ephemeris_20210930.txt 22-Jun-2023 00:48 109566