PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-11:12:30
G01     308.0          32.5                6.2 +/-    1.38      10.3 +/-    1.38  0.040 / 0.060
G10     105.1          40.8                6.0 +/-    0.64       8.6 +/-    0.64  0.050 / 0.060
G11     284.6          27.4                5.5 +/-    0.89      10.2 +/-    0.89  0.080 / 0.230
G14     343.8          68.2                5.5 +/-    1.10       5.8 +/-    1.10  0.090 / 0.250
G18     280.1          49.1                6.4 +/-    0.56       8.2 +/-    0.56  0.080 / 0.220
G25     83.9           16.4                2.0 +/-    1.18       4.8 +/-    1.18  0.100 / 0.230
G31     163.3          65.7                8.4 +/-    0.75       9.1 +/-    0.75  0.040 / 0.020
G32     37.0           51.8                5.5 +/-    0.41       6.8 +/-    0.41  0.040 / 0.020