PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/18-08:42:50
G01     82.4           33.0                3.7 +/-    0.30       6.1 +/-    0.30  0.030 / 0.030
G07     131.1          38.6                5.9 +/-    0.69       8.7 +/-    0.69  0.030 / 0.030
G11     60.3           35.7                3.1 +/-    0.51       4.8 +/-    0.51  0.040 / 0.070
G13     286.3          37.8                3.9 +/-    1.34       5.9 +/-    1.34  0.040 / 0.070
G15     313.5          10.3               -9.6 +/-   10.81     -26.7 +/-   10.81  0.090 / 0.100
G17     219.8          62.4                6.1 +/-    0.63       6.8 +/-    0.63  0.090 / 0.110
G18     55.6           21.1                1.6 +/-    0.71       3.5 +/-    0.71  0.090 / 0.270
G19     217.9          29.5                5.3 +/-    2.06       9.3 +/-    2.06  0.090 / 0.260
G28     359.0          61.3                2.8 +/-    0.56       3.2 +/-    0.56  0.060 / 0.120
G30     120.4          72.7                5.6 +/-    1.18       5.8 +/-    1.18  0.060 / 0.090