PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-10:57:40
G01     128.7          10.2              -18.8 +/-   19.01     -52.3 +/-   19.01  0.030 / 0.040
G07     46.2           69.6                5.7 +/-    0.50       6.1 +/-    0.50  0.030 / 0.030
G08     51.0           39.3                4.0 +/-    0.87       5.9 +/-    0.87  0.030 / 0.040
G09     176.3          36.0                7.3 +/-    1.66      11.3 +/-    1.66  0.030 / 0.040
G11     119.1          34.2                6.5 +/-    0.73      10.5 +/-    0.73  0.210 / 0.300
G17     199.1          14.1                2.2 +/-    1.70       5.6 +/-    1.70  0.110 / 0.190
G18     105.2          15.5                4.3 +/-    1.61      10.7 +/-    1.61  0.100 / 0.210
G28     272.4          51.5                4.3 +/-    1.50       5.3 +/-    1.50  0.060 / 0.060
G30     328.3          57.2                3.6 +/-    0.70       4.1 +/-    0.70  0.050 / 0.060