PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/22-08:27:40
G01     81.6           33.1                9.7 +/-    1.26      16.0 +/-    1.26  0.030 / 0.040
G07     131.5          37.9               10.2 +/-    1.05      15.3 +/-    1.05  0.030 / 0.040
G11     59.7           35.3                5.9 +/-    1.14       9.3 +/-    1.14  0.040 / 0.080
G13     285.5          37.9                5.4 +/-    1.35       8.2 +/-    1.35  0.050 / 0.100
G15     312.9          10.6               -5.1 +/-   16.21     -14.0 +/-   16.21  0.100 / 0.250
G17     220.5          63.1               10.7 +/-    0.97      11.8 +/-    0.97  0.090 / 0.250
G18     54.9           20.8                4.0 +/-    1.59       8.6 +/-    1.59  0.080 / 0.110
G19     218.2          30.2                5.9 +/-    1.09      10.3 +/-    1.09  0.080 / 0.130
G28     0.1            61.3                6.4 +/-    0.45       7.2 +/-    0.45  0.060 / 0.140
G30     121.8          72.2                9.8 +/-    1.06      10.3 +/-    1.06  0.060 / 0.120