# px     py   pz   DEMFileName 
# Strip DEM - [px py pz] =Coordinates aligned with the reference DEM (reference in bundle adjustment). 
       -0.00        -6.24         3.48  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//W1W1_20110322_1020010013924200_1020010013C4F100_2m_lsf_seg8_meta.txt 
        2.21        -7.34        -0.61  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//W1W1_20110409_10200100126AFB00_1020010012E48400_2m_lsf_seg5_meta.txt 
        2.15        -6.27       -13.81  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//W1W2_20110603_102001001370A300_103001000B6FD700_2m_lsf_seg1_meta.txt 
        1.22         1.11        -0.52  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20120615_102001001B3B9800_102001001C555C00_2m_lsf_seg1_meta.txt 
       -1.36         4.51         4.11  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20121002_103001001BBE4900_103001001B4F9F00_2m_lsf_seg2_meta.txt 
       -2.84        -1.05        -2.14  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20140415_102001002D5DF900_102001002C9A9C00_2m_lsf_seg1_meta.txt 
       -1.67         1.90         1.15  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20150401_10300100405CE100_103001004086CE00_2m_lsf_seg1_meta.txt 
        2.63         1.66         4.07  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20160623_1030010058298600_103001005AB2DB00_2m_lsf_seg1_meta.txt 
       -4.60         4.66         0.90  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20170616_1020010062014E00_1020010064DAF300_2m_lsf_seg1_meta.txt 
        2.47         5.10         4.70  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV02_20190619_1030010095309800_1030010092819100_2m_lsf_seg1_meta.txt 
       -0.20         1.96        -1.31  /home/chunlidai/blue/data/ArcticDEMdata/arcticdem_34_alaska_north//WV01_20200508_10200100969C2B00_1020010098DD3E00_2m_lsf_seg1_meta.txt