PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-10:27:50
G01     85.6           32.7                5.2 +/-    0.99       8.6 +/-    0.99  0.030 / 0.030
G07     129.0          41.3                5.4 +/-    0.88       7.7 +/-    0.88  0.030 / 0.030
G11     63.1           37.3                3.6 +/-    0.60       5.4 +/-    0.60  0.040 / 0.070
G13     289.6          37.3                3.9 +/-    1.03       5.9 +/-    1.03  0.030 / 0.070
G17     217.3          59.3                6.7 +/-    0.50       7.7 +/-    0.50  0.080 / 0.110
G18     58.5           22.2                2.3 +/-    1.65       4.8 +/-    1.65  0.080 / 0.110
G19     216.7          26.4                6.0 +/-    1.81      11.3 +/-    1.81  0.080 / 0.110
G28     354.7          61.5                5.3 +/-    1.42       6.0 +/-    1.42  0.060 / 0.100
G30     113.9          74.8                8.2 +/-    1.31       8.5 +/-    1.31  0.070 / 0.180