PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-14:12:40
G01     113.3          21.6               10.2 +/-    1.01      21.5 +/-    1.01  0.030 / 0.040
G07     97.7           59.7                9.4 +/-    0.59      10.7 +/-    0.59  0.040 / 0.040
G08     42.7           24.4                6.6 +/-    0.84      13.1 +/-    0.84  0.030 / 0.050
G09     174.8          18.7               10.7 +/-    1.48      24.4 +/-    1.48  0.030 / 0.050
G11     95.4           39.9                9.3 +/-    0.98      13.5 +/-    0.98  0.090 / 0.100
G13     315.6          22.3                4.3 +/-    1.59       9.0 +/-    1.59  0.080 / 0.100
G17     202.7          33.2               11.7 +/-    1.43      19.2 +/-    1.43  0.070 / 0.260
G28     304.4          59.2                8.2 +/-    1.19       9.4 +/-    1.19  0.090 / 0.250
G30     353.1          71.6                7.7 +/-    1.56       8.1 +/-    1.56  0.110 / 0.170