PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-01:57:40
G01     66.8           32.3                3.7 +/-    0.69       6.1 +/-    0.69  0.030 / 0.050
G07     139.4          28.0                4.7 +/-    1.56       8.6 +/-    1.56  0.040 / 0.060
G11     53.0           30.4                3.9 +/-    0.90       6.7 +/-    0.90  0.040 / 0.040
G13     271.0          36.7                5.2 +/-    0.97       7.9 +/-    0.97  0.030 / 0.040
G15     298.7          16.3                3.8 +/-    2.19       9.2 +/-    2.19  0.040 / 0.080
G17     239.9          70.5                4.8 +/-    0.80       5.0 +/-    0.80  0.050 / 0.080
G19     227.2          45.7                6.8 +/-    0.54       9.1 +/-    0.54  0.050 / 0.130
G28     26.9           58.1                3.2 +/-    0.71       3.7 +/-    0.71  0.050 / 0.130
G30     138.3          53.5                7.0 +/-    0.60       8.4 +/-    0.60  0.060 / 0.140