PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-06:57:40
G01     65.6           32.1                5.1 +/-    0.44       8.6 +/-    0.44  0.040 / 0.040
G06     181.5          10.1              -17.9 +/-   20.98     -49.7 +/-   20.98  0.040 / 0.040
G07     139.7          25.2                7.5 +/-    1.67      14.7 +/-    1.67  0.030 / 0.030
G11     49.8           26.2                5.0 +/-    1.09       9.5 +/-    1.09  0.030 / 0.040
G13     268.2          37.1                8.2 +/-    1.17      12.5 +/-    1.17  0.070 / 0.120
G15     300.7          14.8                1.1 +/-    2.22       2.8 +/-    2.22  0.080 / 0.110
G17     246.1          75.6                7.3 +/-    0.67       7.5 +/-    0.67  0.030 / 0.060
G19     227.2          43.2                8.0 +/-    1.21      11.1 +/-    1.21  0.030 / 0.050
G28     24.1           58.9                5.8 +/-    0.86       6.6 +/-    0.86  0.050 / 0.110
G30     140.2          59.2                9.2 +/-    0.71      10.5 +/-    0.71  0.050 / 0.140