PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/20-19:43:10
G01     312.2          28.6                9.3 +/-    0.79      16.7 +/-    0.79  0.100 / 0.220
G10     98.4           45.3                9.5 +/-    0.57      12.7 +/-    0.57  0.130 / 0.250
G11     290.1          27.3                7.2 +/-    0.92      13.3 +/-    0.92  0.110 / 0.130
G14     340.4          69.5               10.1 +/-    0.78      10.7 +/-    0.78  0.090 / 0.160
G18     113.2          17.6               10.0 +/-    1.40      23.2 +/-    1.40  0.120 / 0.300
G22     306.9          20.2               11.1 +/-    1.95      24.4 +/-    1.95  0.100 / 0.230
G25     88.5           14.4               10.0 +/-    1.47      25.2 +/-    1.47  0.030 / 0.040
G31     173.5          56.3               12.8 +/-    0.80      15.0 +/-    0.80  0.040 / 0.040
G32     27.5           57.9                9.0 +/-    0.44      10.4 +/-    0.44  0.040 / 0.060