PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-12:57:50
G02     24.1           63.4                3.4 +/-    0.85       3.8 +/-    0.85  0.030 / 0.040
G05     155.0          51.2                8.8 +/-    1.36      10.9 +/-    1.36  0.030 / 0.040
G06     47.3           28.0                1.8 +/-    1.28       3.2 +/-    1.28  0.020 / 0.030
G12     235.6          78.0                2.6 +/-    0.51       2.6 +/-    0.51  0.020 / 0.030
G19     92.1           15.1                4.7 +/-    1.69      11.6 +/-    1.69  0.160 / 0.440
G20     198.4          14.6                2.0 +/-    3.29       5.0 +/-    3.29  0.180 / 0.430
G24     216.7          10.6                3.5 +/-    1.75       9.7 +/-    1.75  0.190 / 0.260
G25     308.7          46.2                2.7 +/-    1.19       3.6 +/-    1.19  0.270 / 0.370
G29     302.1          24.9                4.6 +/-    1.19       8.9 +/-    1.19  0.070 / 0.100