PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-14:57:40
G02     69.0           24.4                8.9 +/-    0.93      17.7 +/-    0.93  0.030 / 0.040
G05     48.6           52.7                7.2 +/-    0.52       8.8 +/-    0.52  0.030 / 0.040
G12     183.9          22.6                9.1 +/-    2.44      18.9 +/-    2.44  0.050 / 0.140
G13     120.7          22.4               13.0 +/-    1.41      27.0 +/-    1.41  0.050 / 0.140
G15     156.8          21.2               11.1 +/-    1.49      23.7 +/-    1.49  0.030 / 0.040
G18     221.3          11.6                1.4 +/-   23.68       3.6 +/-   23.68  0.030 / 0.050
G20     217.3          70.2               11.3 +/-    0.69      11.9 +/-    0.69  0.090 / 0.160
G21     281.7          27.3                7.6 +/-    1.19      14.1 +/-    1.19  0.090 / 0.180
G25     222.6          42.9                9.8 +/-    1.72      13.6 +/-    1.72  0.070 / 0.210
G29     343.8          70.4                7.0 +/-    0.64       7.3 +/-    0.64  0.090 / 0.220