PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-01:57:50
G07     328.5          56.1                4.7 +/-    0.42       5.5 +/-    0.42  0.090 / 0.170
G08     104.9          50.8                7.2 +/-    0.42       9.0 +/-    0.42  0.110 / 0.170
G09     201.2          77.6                6.6 +/-    0.42       6.7 +/-    0.42  0.120 / 0.220
G11     148.6          10.5               -1.1 +/-   16.27      -2.9 +/-   16.27  0.090 / 0.190
G16     45.4           12.9                2.9 +/-    2.23       7.6 +/-    2.23  0.040 / 0.050
G23     154.4          45.8                8.3 +/-    0.95      11.1 +/-    0.95  0.040 / 0.040
G27     57.6           32.6                4.6 +/-    0.73       7.6 +/-    0.73  0.030 / 0.030
G28     235.0          27.6                4.6 +/-    1.81       8.4 +/-    1.81  0.020 / 0.020
G30     300.4          34.6                3.0 +/-    1.39       4.8 +/-    1.39  0.080 / 0.060