PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-20:27:40
G01     297.3          38.2                9.3 +/-    1.00      13.9 +/-    1.00  0.050 / 0.120
G03     310.0          12.9               10.4 +/-    1.57      27.1 +/-    1.57  0.050 / 0.110
G10     115.2          33.5               13.5 +/-    0.85      22.0 +/-    0.85  0.070 / 0.090
G11     271.8          27.4                9.2 +/-    1.63      17.0 +/-    1.63  0.080 / 0.070
G14     15.9           61.8                7.6 +/-    0.72       8.5 +/-    0.72  0.060 / 0.110
G22     312.5          33.2                7.9 +/-    1.50      12.9 +/-    1.50  0.060 / 0.110
G25     72.1           18.5                9.2 +/-    1.45      21.1 +/-    1.45  0.040 / 0.020
G31     156.9          74.2                8.8 +/-    1.24       9.2 +/-    1.24  0.030 / 0.040
G32     45.3           46.3                7.8 +/-    0.45      10.3 +/-    0.45  0.030 / 0.040