PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-11:12:50
G01     124.9          13.3                3.7 +/-    2.13       9.5 +/-    2.13  0.050 / 0.030
G07     61.2           69.0                4.1 +/-    0.46       4.4 +/-    0.46  0.040 / 0.020
G08     47.7           35.5                2.5 +/-    1.03       3.9 +/-    1.03  0.040 / 0.030
G09     175.9          30.9                6.0 +/-    1.02      10.3 +/-    1.02  0.030 / 0.030
G11     113.7          36.8                4.5 +/-    0.81       6.9 +/-    0.81  0.140 / 0.270
G13     320.3          14.0                2.0 +/-    1.79       5.0 +/-    1.79  0.120 / 0.220
G17     199.7          18.8                3.0 +/-    2.89       6.9 +/-    2.89  0.070 / 0.270
G18     100.6          17.8                3.4 +/-    1.54       7.8 +/-    1.54  0.210 / 0.330
G28     280.0          54.1                2.7 +/-    2.66       3.2 +/-    2.66  0.120 / 0.240
G30     333.7          61.3                3.6 +/-    0.67       4.0 +/-    0.67  0.100 / 0.210