PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-00:12:40
G02     240.5          75.9                8.8 +/-    0.48       9.1 +/-    0.48  0.090 / 0.090
G05     171.3          15.9               13.8 +/-    1.57      33.6 +/-    1.57  0.100 / 0.100
G06     40.3           62.7                6.7 +/-    0.46       7.4 +/-    0.46  0.030 / 0.040
G12     320.7          48.0                8.2 +/-    0.84      10.6 +/-    0.84  0.040 / 0.050
G17     70.2           22.1                8.4 +/-    2.48      17.5 +/-    2.48  0.140 / 0.270
G19     55.9           38.9                9.0 +/-    1.10      13.3 +/-    1.10  0.110 / 0.310
G24     244.8          35.1               10.9 +/-    1.76      17.2 +/-    1.76  0.070 / 0.070
G25     316.2          12.1               -0.9 +/-   33.54      -2.5 +/-   33.54  0.060 / 0.050