PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/22-08:57:40
G01     40.0           14.3                3.9 +/-    2.73       9.9 +/-    2.73  0.060 / 0.070
G02     199.0          11.5                1.7 +/-    5.42       4.5 +/-    5.42  0.050 / 0.070
G06     177.8          38.8                9.0 +/-    1.10      13.3 +/-    1.10  0.370 / 0.180
G13     236.9          20.4                6.7 +/-    1.86      14.6 +/-    1.86  0.170 / 0.240
G15     268.3          11.6                6.3 +/-    1.43      16.9 +/-    1.43  0.090 / 0.230
G17     10.0           67.4                6.2 +/-    0.33       6.7 +/-    0.33  0.100 / 0.230
G19     290.0          71.2                6.0 +/-    0.56       6.3 +/-    0.56  0.030 / 0.020
G24     316.3          20.1                2.5 +/-    1.99       5.6 +/-    1.99  0.020 / 0.020
G28     75.8           45.0                7.8 +/-    0.65      10.4 +/-    0.65  0.050 / 0.060
G30     154.9          24.3               10.1 +/-    1.78      20.0 +/-    1.78  0.040 / 0.050