PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-20:27:50
G02     352.0          75.8                7.5 +/-    0.39       7.7 +/-    0.39  0.030 / 0.030
G05     164.2          38.7               11.6 +/-    0.72      17.3 +/-    0.72  0.040 / 0.030
G06     44.3           33.1                6.5 +/-    1.03      10.7 +/-    1.03  0.030 / 0.020
G12     286.1          78.9                8.2 +/-    0.22       8.4 +/-    0.22  0.030 / 0.030
G19     83.1           21.1                8.8 +/-    1.81      18.9 +/-    1.81  0.070 / 0.080
G25     314.3          40.4                7.7 +/-    1.90      11.2 +/-    1.90  0.060 / 0.090
G29     292.3          14.4                9.3 +/-    2.27      23.5 +/-    2.27  0.040 / 0.050