PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-13:43:10
G01     92.1           31.1                5.1 +/-    1.15       8.7 +/-    1.15  0.040 / 0.050
G07     124.0          44.1                7.3 +/-    1.19      10.0 +/-    1.19  0.040 / 0.050
G11     69.1           38.1                4.9 +/-    1.19       7.3 +/-    1.19  0.060 / 0.120
G13     298.8          34.0                4.1 +/-    2.74       6.6 +/-    2.74  0.050 / 0.130
G17     212.7          54.3                6.8 +/-    0.84       8.1 +/-    0.84  0.040 / 0.030
G19     213.6          27.1                4.0 +/-    2.12       7.4 +/-    2.12  0.030 / 0.030
G28     345.6          61.7                4.5 +/-    0.85       5.0 +/-    0.85  0.070 / 0.090
G30     87.8           78.9                6.2 +/-    0.60       6.3 +/-    0.60  0.070 / 0.090