PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/15-08:58:00
G01     80.9           33.1                6.7 +/-    1.23      11.0 +/-    1.23  0.040 / 0.030
G07     132.0          37.5                7.9 +/-    0.84      12.0 +/-    0.84  0.030 / 0.030
G11     59.2           35.0                4.5 +/-    0.55       7.2 +/-    0.55  0.040 / 0.080
G13     284.8          38.0                6.5 +/-    1.29       9.7 +/-    1.29  0.050 / 0.080
G15     312.7          10.7               -3.7 +/-   16.35     -10.2 +/-   16.35  0.070 / 0.100
G17     221.2          63.6                9.7 +/-    0.60      10.7 +/-    0.60  0.060 / 0.110
G18     54.5           20.6                3.8 +/-    1.96       8.1 +/-    1.96  0.060 / 0.130
G19     218.6          30.6                6.9 +/-    1.28      11.9 +/-    1.28  0.060 / 0.120
G28     1.5            61.2                5.6 +/-    0.50       6.3 +/-    0.50  0.080 / 0.270
G30     123.1          71.6                7.9 +/-    0.95       8.3 +/-    0.95  0.080 / 0.250