PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-15:42:50
G01     57.2           29.4                9.6 +/-    0.48      17.1 +/-    0.48  0.040 / 0.050
G07     143.5          19.7               12.8 +/-    1.10      28.3 +/-    1.10  0.040 / 0.050
G11     46.8           21.0                8.6 +/-    2.51      18.5 +/-    2.51  0.050 / 0.110
G13     259.0          34.2               11.8 +/-    0.93      19.0 +/-    0.93  0.060 / 0.090
G15     293.7          15.4                9.6 +/-    1.76      23.8 +/-    1.76  0.070 / 0.210
G17     271.6          77.9               14.2 +/-    0.52      14.5 +/-    0.52  0.090 / 0.240
G18     40.5           10.9                9.1 +/-    2.43      25.0 +/-    2.43  0.080 / 0.270
G19     234.9          50.2               14.8 +/-    0.99      18.6 +/-    0.99  0.080 / 0.340
G28     40.1           55.8               11.7 +/-    0.70      13.8 +/-    0.70  0.040 / 0.070
G30     145.8          50.4               13.0 +/-    0.89      16.3 +/-    0.89  0.030 / 0.060