PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-17:28:10
G01     128.0          10.9              -10.1 +/-   45.22     -27.6 +/-   45.22  0.070 / 0.100
G07     47.7           69.8               11.6 +/-    0.46      12.3 +/-    0.46  0.070 / 0.100
G08     52.7           42.6               10.4 +/-    0.64      14.5 +/-    0.64  0.080 / 0.130
G09     178.4          37.4               15.1 +/-    1.06      23.0 +/-    1.06  0.080 / 0.140
G11     120.7          34.4               13.5 +/-    1.19      21.6 +/-    1.19  0.030 / 0.030
G13     321.5          10.5               -8.3 +/-    6.90     -23.0 +/-    6.90  0.030 / 0.030
G17     200.8          11.1                2.9 +/-   35.28       7.8 +/-   35.28  0.040 / 0.050
G18     105.3          16.0               12.7 +/-    1.87      30.7 +/-    1.87  0.030 / 0.040
G28     274.7          52.4               12.1 +/-    1.11      14.9 +/-    1.11  0.170 / 0.340
G30     332.7          60.2               11.1 +/-    1.39      12.6 +/-    1.39  0.170 / 0.340