PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-20:42:30
G02     11.7           69.3                8.8 +/-    0.66       9.4 +/-    0.66  0.090 / 0.360
G05     159.4          47.4               11.9 +/-    1.25      15.5 +/-    1.25  0.100 / 0.370
G06     47.7           25.9                8.2 +/-    1.04      15.8 +/-    1.04  0.030 / 0.030
G12     232.4          79.1                8.4 +/-    1.28       8.6 +/-    1.28  0.030 / 0.030
G19     90.4           16.0                9.4 +/-    1.48      22.8 +/-    1.48  0.050 / 0.070
G20     197.0          14.8               12.1 +/-    4.77      30.3 +/-    4.77  0.040 / 0.070
G24     218.4          12.3               11.8 +/-    3.32      31.4 +/-    3.32  0.050 / 0.060
G25     308.7          48.0               10.0 +/-    0.94      12.9 +/-    0.94  0.050 / 0.060
G29     298.6          20.0                9.3 +/-    2.43      20.4 +/-    2.43  0.100 / 0.180