PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-23:12:30
G03     211.7          56.8               11.5 +/-    0.57      13.4 +/-    0.57  0.060 / 0.070
G07     257.9          16.1                9.4 +/-    3.01      22.7 +/-    3.01  0.050 / 0.070
G09     310.7          28.3                6.7 +/-    1.14      12.1 +/-    1.14  0.130 / 0.270
G16     100.2          66.0               10.8 +/-    1.30      11.7 +/-    1.30  0.190 / 0.350
G22     188.5          41.2               11.4 +/-    0.85      16.3 +/-    0.85  0.040 / 0.030
G23     330.6          60.4                7.8 +/-    0.33       8.9 +/-    0.33  0.040 / 0.040
G26     53.5           43.9                7.8 +/-    0.56      10.7 +/-    0.56  0.250 / 0.290
G27     132.3          11.8               10.6 +/-    2.02      28.5 +/-    2.02  0.280 / 0.210
G31     59.5           10.8                6.2 +/-    1.09      17.0 +/-    1.09  0.090 / 0.100