PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-19:58:10
G01     310.0          30.8               11.0 +/-    1.02      18.9 +/-    1.02  0.100 / 0.130
G10     102.0          43.2               13.8 +/-    1.09      19.1 +/-    1.09  0.140 / 0.130
G11     286.7          27.8                8.4 +/-    1.26      15.5 +/-    1.26  0.040 / 0.040
G14     348.7          68.4                9.7 +/-    0.43      10.4 +/-    0.43  0.040 / 0.040
G18     115.3          15.4               14.0 +/-    2.40      34.5 +/-    2.40  0.150 / 0.210
G22     308.2          22.5               11.0 +/-    2.73      22.7 +/-    2.73  0.090 / 0.190
G25     85.5           15.5               12.9 +/-    1.69      31.8 +/-    1.69  0.050 / 0.030
G31     172.2          59.8               12.4 +/-    0.46      14.1 +/-    0.46  0.040 / 0.030
G32     31.2           55.7               10.1 +/-    0.89      11.9 +/-    0.89  0.030 / 0.030