PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/08-13:58:00
G01     128.8          10.2               -4.1 +/-   39.23     -11.5 +/-   39.23  0.030 / 0.040
G07     45.4           69.8                9.5 +/-    0.65      10.1 +/-    0.65  0.040 / 0.040
G08     52.2           41.2                7.1 +/-    1.05      10.2 +/-    1.05  0.030 / 0.030
G09     177.3          37.2                9.3 +/-    1.17      14.2 +/-    1.17  0.040 / 0.040
G11     120.3          34.0               11.5 +/-    0.83      18.6 +/-    0.83  0.150 / 0.230
G17     199.9          12.3                5.3 +/-   11.60      14.1 +/-   11.60  0.130 / 0.300
G18     105.7          15.5                9.9 +/-    1.63      24.3 +/-    1.63  0.280 / 0.330
G28     272.7          51.6               10.6 +/-    2.98      13.2 +/-    2.98  0.150 / 0.350
G30     329.7          58.2                8.9 +/-    0.50      10.3 +/-    0.50  0.070 / 0.070