PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-18:27:40
G01     320.8          11.6               -5.0 +/-   35.18     -13.6 +/-   35.18  0.170 / 0.340
G08     264.8          16.6               12.4 +/-    0.79      29.7 +/-    0.79  0.070 / 0.190
G10     66.4           57.5                9.7 +/-    0.94      11.3 +/-    0.94  0.060 / 0.080
G11     310.0          18.4                8.2 +/-    1.49      18.8 +/-    1.49  0.060 / 0.080
G14     275.0          67.8               10.2 +/-    0.67      10.9 +/-    0.67  0.020 / 0.030
G18     96.0           32.4                9.9 +/-    1.00      16.5 +/-    1.00  0.020 / 0.020
G27     228.3          13.3               12.0 +/-    3.03      31.2 +/-    3.03  0.040 / 0.040
G31     178.7          32.8               13.7 +/-    1.53      22.7 +/-    1.53  0.030 / 0.040
G32     347.4          72.5                9.9 +/-    0.48      10.3 +/-    0.48  0.030 / 0.030