PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-17:12:30
G07     353.9          64.4               12.7 +/-    0.60      14.0 +/-    0.60  0.030 / 0.050
G08     80.3           53.4               13.9 +/-    0.55      16.9 +/-    0.55  0.030 / 0.050
G09     182.3          59.8               15.4 +/-    1.19      17.5 +/-    1.19  0.050 / 0.100
G11     138.1          21.2               16.9 +/-    1.05      36.1 +/-    1.05  0.050 / 0.100
G23     157.2          24.0               16.5 +/-    2.12      32.9 +/-    2.12  0.060 / 0.210
G27     44.9           23.5                9.3 +/-    1.00      18.9 +/-    1.00  0.070 / 0.190
G28     249.1          39.5               17.7 +/-    1.15      25.9 +/-    1.15  0.090 / 0.250
G30     313.2          44.8               12.4 +/-    0.91      16.8 +/-    0.91  0.060 / 0.220