PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-04:27:50
G02     199.1          19.3                4.8 +/-    2.02      10.8 +/-    2.02  0.080 / 0.070
G06     175.5          47.6                5.6 +/-    0.42       7.3 +/-    0.42  0.060 / 0.060
G13     230.6          15.4                5.7 +/-    1.78      14.0 +/-    1.78  0.040 / 0.030
G17     16.4           63.1                2.9 +/-    0.56       3.2 +/-    0.56  0.030 / 0.030
G19     313.5          71.6                3.3 +/-    0.75       3.4 +/-    0.75  0.080 / 0.150
G24     312.7          26.3                2.1 +/-    1.78       4.0 +/-    1.78  0.080 / 0.140
G28     84.7           41.1                3.6 +/-    0.93       5.1 +/-    0.93  0.140 / 0.190
G30     155.5          14.6                7.4 +/-    1.60      18.6 +/-    1.60  0.130 / 0.260