PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-14:12:40
G01     129.3          9.8               -14.2 +/-   25.67     -39.6 +/-   25.67  0.100 / 0.220
G07     43.4           69.8                9.1 +/-    0.65       9.6 +/-    0.65  0.080 / 0.240
G08     52.8           41.9                7.7 +/-    1.07      10.9 +/-    1.07  0.200 / 0.270
G09     177.5          38.0                8.6 +/-    0.97      12.9 +/-    0.97  0.140 / 0.280
G11     121.1          33.6               10.6 +/-    1.14      17.3 +/-    1.14  0.030 / 0.030
G17     199.9          11.5               -1.4 +/-   20.25      -3.8 +/-   20.25  0.030 / 0.030
G18     106.3          15.2                8.7 +/-    1.89      21.6 +/-    1.89  0.110 / 0.330
G27     37.6           9.5                 5.5 +/-    3.81      15.6 +/-    3.81  0.190 / 0.310
G28     271.8          51.3                9.7 +/-    3.19      12.0 +/-    3.19  0.050 / 0.070
G30     329.2          57.8                8.5 +/-    0.49       9.9 +/-    0.49  0.040 / 0.060