PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-13:12:30
G01     220.7          11.3                7.2 +/-    1.34      19.4 +/-    1.34  0.100 / 0.180
G03     256.8          70.7                9.2 +/-    0.55       9.7 +/-    0.55  0.080 / 0.200
G09     299.0          12.8                3.6 +/-   10.28       9.5 +/-   10.28  0.030 / 0.040
G14     92.0           23.0                8.5 +/-    1.64      17.3 +/-    1.64  0.030 / 0.030
G16     135.2          53.7               10.8 +/-    0.41      13.0 +/-    0.41  0.200 / 0.400
G22     193.8          60.1               10.1 +/-    0.37      11.5 +/-    0.37  0.140 / 0.410
G23     317.0          47.5                8.1 +/-    1.37      10.6 +/-    1.37  0.040 / 0.020
G26     78.6           53.0                8.8 +/-    0.99      10.8 +/-    0.99  0.040 / 0.030
G31     49.3           23.3                6.1 +/-    1.84      12.5 +/-    1.84  0.060 / 0.050