PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-12:42:50
G07     344.2          61.8                7.2 +/-    1.05       8.1 +/-    1.05  0.080 / 0.080
G08     85.8           52.5                8.0 +/-    0.67       9.8 +/-    0.67  0.080 / 0.090
G09     181.7          64.4                8.3 +/-    1.70       9.1 +/-    1.70  0.070 / 0.090
G11     140.6          18.0                7.3 +/-    2.12      16.8 +/-    2.12  0.050 / 0.110
G23     157.2          32.9                8.7 +/-    1.99      14.4 +/-    1.99  0.120 / 0.300
G27     49.0           27.6                5.6 +/-    1.00      10.2 +/-    1.00  0.110 / 0.400
G28     243.4          35.0                7.1 +/-    1.24      11.3 +/-    1.24  0.050 / 0.050
G30     307.3          39.3                5.0 +/-    0.77       7.4 +/-    0.77  0.040 / 0.050