PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-15:12:30
G02     203.9          30.6                9.9 +/-    2.09      17.2 +/-    2.09  0.070 / 0.070
G06     155.2          69.3                9.8 +/-    0.57      10.4 +/-    0.57  0.110 / 0.090
G12     308.3          18.7                7.5 +/-    1.28      17.1 +/-    1.28  0.080 / 0.180
G17     36.4           48.7                8.3 +/-    1.12      10.6 +/-    1.12  0.110 / 0.180
G19     348.7          67.2                8.9 +/-    0.41       9.6 +/-    0.41  0.030 / 0.030
G24     297.7          38.8                8.1 +/-    5.15      12.0 +/-    5.15  0.040 / 0.030
G28     101.1          32.2                8.8 +/-    1.36      14.8 +/-    1.36  0.030 / 0.020