PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-05:57:50
G01     83.4           32.9                2.9 +/-    1.24       4.8 +/-    1.24  0.030 / 0.040
G07     130.3          39.9                5.6 +/-    1.39       8.1 +/-    1.39  0.040 / 0.040
G11     63.2           37.1                3.2 +/-    0.75       4.9 +/-    0.75  0.090 / 0.260
G13     289.3          36.6                7.5 +/-    1.55      11.6 +/-    1.55  0.160 / 0.220
G15     310.9          12.7                3.7 +/-    2.05       9.8 +/-    2.05  0.060 / 0.040
G17     219.5          60.3                7.5 +/-    1.33       8.5 +/-    1.33  0.050 / 0.050
G19     217.4          33.6                8.2 +/-    0.96      13.3 +/-    0.96  0.070 / 0.080
G28     1.7            61.0                2.6 +/-    0.44       2.9 +/-    0.44  0.040 / 0.090
G30     119.9          70.0                4.3 +/-    0.69       4.6 +/-    0.69  0.030 / 0.040