PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-09:57:50
G01     86.2           32.4                4.2 +/-    0.57       7.0 +/-    0.57  0.060 / 0.070
G07     128.4          40.9                6.1 +/-    0.87       8.7 +/-    0.87  0.050 / 0.070
G11     64.5           36.9                2.8 +/-    0.71       4.2 +/-    0.71  0.040 / 0.060
G13     292.8          35.7                4.9 +/-    1.09       7.7 +/-    1.09  0.050 / 0.060
G15     313.7          11.1                0.6 +/-    8.89       1.7 +/-    8.89  0.040 / 0.050
G17     217.0          59.2                6.8 +/-    1.37       7.8 +/-    1.37  0.040 / 0.050
G19     216.1          31.7                5.8 +/-    2.01       9.7 +/-    2.01  0.180 / 0.340
G28     356.6          61.3                3.2 +/-    0.80       3.6 +/-    0.80  0.160 / 0.320
G30     111.5          74.2                4.4 +/-    0.81       4.5 +/-    0.81  0.100 / 0.130