PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-06:27:40
G01     51.5           26.3                2.5 +/-    1.08       4.7 +/-    1.08  0.040 / 0.060
G06     181.8          19.3                4.4 +/-    2.60       9.9 +/-    2.60  0.040 / 0.070
G07     145.7          13.6                6.4 +/-    2.73      16.5 +/-    2.73  0.140 / 0.330
G11     45.3           16.8                1.8 +/-    1.17       4.2 +/-    1.17  0.120 / 0.260
G13     253.7          31.1                6.6 +/-    1.32      11.3 +/-    1.32  0.020 / 0.030
G15     284.7          16.3                2.8 +/-    3.01       6.8 +/-    3.01  0.040 / 0.030
G17     310.0          79.0                4.1 +/-    0.84       4.2 +/-    0.84  0.090 / 0.270
G19     245.2          59.9                4.8 +/-    0.44       5.5 +/-    0.44  0.100 / 0.310
G28     51.1           53.1                3.6 +/-    0.42       4.3 +/-    0.42  0.110 / 0.260
G30     148.3          41.3                8.8 +/-    1.04      12.5 +/-    1.04  0.110 / 0.250