# px     py   pz   DEMFileName 
# Strip DEM - [px py pz] =Coordinates aligned with the reference DEM (reference in bundle adjustment). 
        1.65         2.52         5.08  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20130403_103001002014FA00_1030010021CD9100_2m_lsf_seg1_meta.txt 
        0.66        -0.45        -0.20  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20130510_1030010022936800_103001002104E600_2m_lsf_seg1_meta.txt 
       -5.03         1.56        -0.78  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20130519_1020010023A8F000_1020010021174C00_2m_lsf_seg1_meta.txt 
       -2.40        -4.22        -0.07  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20130704_1020010024154A00_102001002476A500_2m_lsf_seg1_meta.txt 
        0.41        -1.28        -2.33  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20130714_103001002502EB00_103001002560C000_2m_lsf_seg1_meta.txt 
        0.53        -0.11        -0.12  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20130923_1020010025C14E00_1020010025C6FD00_2m_lsf_seg1_meta.txt 
        1.85         3.56         2.10  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20131012_1030010027182D00_1030010028506600_2m_lsf_seg1_meta.txt 
        0.40        -2.87        -2.03  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20131014_102001002596D400_102001002722E700_2m_lsf_seg1_meta.txt 
        2.74         3.54         2.85  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20131019_1030010028BF3B00_1030010028C1F200_2m_lsf_seg1_meta.txt 
       -0.44        -1.21        -0.85  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20131022_1020010024AD8400_1020010028929E00_2m_lsf_seg2_meta.txt 
        0.37        -0.34        -0.57  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20131026_1020010026BFD500_1020010026203A00_2m_lsf_seg1_meta.txt 
        0.58         2.78        -0.55  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20131107_10300100285F5D00_10300100295FBD00_2m_lsf_seg1_meta.txt 
        2.26        -1.74         4.09  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20140312_103001002D376900_103001002E880E00_2m_lsf_seg1_meta.txt 
       -4.52        -3.87         1.11  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20140324_103001002E142A00_103001002E6B8000_2m_lsf_seg1_meta.txt 
        0.09         2.20        -0.06  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV03_20150419_104001000A297D00_104001000A082F00_2m_lsf_seg1_meta.txt 
        1.85         1.62         0.19  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20150513_10300100421EA800_103001004156E900_2m_lsf_seg1_meta.txt 
        1.35         1.44        -2.50  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20160624_1020010050EB5200_1020010051363F00_2m_lsf_seg1_meta.txt 
       -2.94        -1.77        -2.25  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20170515_1030010069D3A400_1030010069052700_2m_lsf_seg1_meta.txt 
        0.76        -0.20         1.48  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV03_20170604_104001002E5EE400_104001002E239800_2m_lsf_seg1_meta.txt 
        1.15        -0.91        -1.26  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV03_20170614_104001002F50BE00_104001002D17B700_2m_lsf_seg1_meta.txt 
        1.12         4.20        -2.09  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV03_20170630_104001002E56CA00_104001002EB78A00_2m_lsf_seg1_meta.txt 
        2.75        -1.00        -0.91  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20181004_1020010079AFEA00_102001007D602E00_2m_lsf_seg1_meta.txt 
       -1.72        -1.59        -1.56  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20190304_1020010084452500_102001008381B900_2m_lsf_seg1_meta.txt 
        1.09        -2.55         0.30  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20200524_10300100A620CA00_10300100A83A9700_2m_lsf_seg1_meta.txt 
       -6.21        -0.59        -1.20  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20200601_10300100A6963900_10300100A996E400_2m_lsf_seg6_meta.txt 
        1.63         1.28         2.14  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20200603_10300100A6726300_10300100A9BABE00_2m_lsf_seg1_meta.txt