PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-12:57:40
G01     77.3           33.2                5.2 +/-    1.51       8.5 +/-    1.51  0.030 / 0.030
G07     134.0          35.8                6.0 +/-    0.79       9.4 +/-    0.79  0.030 / 0.030
G11     56.9           33.2                5.6 +/-    2.09       9.2 +/-    2.09  0.060 / 0.060
G13     281.1          38.0                4.1 +/-    2.23       6.2 +/-    2.23  0.050 / 0.070
G15     310.2          11.8                2.1 +/-    2.40       5.5 +/-    2.40  0.050 / 0.100
G17     225.0          65.8                6.7 +/-    0.93       7.3 +/-    0.93  0.050 / 0.100
G18     53.0           20.2                4.5 +/-    6.48       9.9 +/-    6.48  0.060 / 0.090
G19     220.4          33.4                4.4 +/-    1.38       7.2 +/-    1.38  0.080 / 0.080
G28     9.2            60.5                5.5 +/-    1.86       6.2 +/-    1.86  0.150 / 0.340
G30     128.2          68.9                6.6 +/-    0.67       7.1 +/-    0.67  0.220 / 0.430