PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-17:12:40
G01     318.6          18.7                7.9 +/-    1.87      17.9 +/-    1.87  0.110 / 0.180
G08     257.8          12.6               10.8 +/-    2.60      28.3 +/-    2.60  0.120 / 0.220
G10     80.9           53.1                8.1 +/-    1.03       9.8 +/-    1.03  0.120 / 0.160
G11     303.6          22.4                7.0 +/-    0.72      14.6 +/-    0.72  0.140 / 0.140
G14     298.4          70.4                7.4 +/-    0.59       7.8 +/-    0.59  0.050 / 0.070
G18     103.6          26.3                8.5 +/-    0.92      16.2 +/-    0.92  0.050 / 0.050
G22     301.2          11.5                3.9 +/-    8.66      10.4 +/-    8.66  0.020 / 0.030
G31     176.1          43.0               11.8 +/-    0.87      16.3 +/-    0.87  0.020 / 0.020
G32     9.6            66.6                7.9 +/-    0.39       8.5 +/-    0.39  0.040 / 0.050