PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-19:28:10
G01     317.0          22.1                5.9 +/-    2.63      12.4 +/-    2.63  0.090 / 0.250
G08     253.2          10.5                7.0 +/-    2.96      19.3 +/-    2.96  0.100 / 0.210
G10     87.0           50.8                9.3 +/-    0.91      11.6 +/-    0.91  0.080 / 0.180
G11     299.0          24.9                8.9 +/-    1.65      17.5 +/-    1.65  0.090 / 0.180
G14     314.1          71.1                7.6 +/-    0.88       8.0 +/-    0.88  0.040 / 0.060
G18     106.8          23.8                9.0 +/-    1.45      18.1 +/-    1.45  0.040 / 0.070
G22     303.0          13.8                7.6 +/-    2.02      19.4 +/-    2.02  0.150 / 0.290
G25     96.5           10.8                0.3 +/-   39.45       0.7 +/-   39.45  0.140 / 0.380
G31     176.3          46.5               11.1 +/-    1.01      14.7 +/-    1.01  0.040 / 0.030
G32     15.0           64.2                7.4 +/-    0.45       8.1 +/-    0.45  0.040 / 0.030