PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-07:43:00
G02     199.4          20.1                7.5 +/-    1.04      16.4 +/-    1.04  0.050 / 0.080
G06     177.4          47.1               10.7 +/-    1.56      14.0 +/-    1.56  0.040 / 0.080
G13     230.0          14.6                6.8 +/-    1.90      17.1 +/-    1.90  0.110 / 0.260
G17     20.7           60.9                5.4 +/-    0.44       6.1 +/-    0.44  0.190 / 0.290
G19     320.1          71.6                5.4 +/-    0.37       5.7 +/-    0.37  0.040 / 0.060
G24     312.2          26.9                2.9 +/-    2.21       5.4 +/-    2.21  0.040 / 0.070
G28     86.2           40.3                6.8 +/-    0.92       9.8 +/-    0.92  0.060 / 0.140
G30     156.3          15.3                7.2 +/-    1.26      17.8 +/-    1.26  0.070 / 0.160