PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-12:27:50
G01     43.4           19.1                2.2 +/-    4.39       5.0 +/-    4.39  0.110 / 0.250
G06     177.0          33.8                4.6 +/-    1.42       7.5 +/-    1.42  0.110 / 0.270
G13     243.3          24.8                7.2 +/-    1.59      14.1 +/-    1.59  0.150 / 0.160
G15     275.7          13.7                5.9 +/-    1.24      15.1 +/-    1.24  0.320 / 0.300
G17     359.7          72.1                3.0 +/-    0.67       3.2 +/-    0.67  0.060 / 0.080
G19     269.9          68.6                3.8 +/-    1.02       4.0 +/-    1.02  0.060 / 0.080
G24     318.3          14.4                1.3 +/-    3.19       3.3 +/-    3.19  0.100 / 0.200
G28     66.8           48.4                3.0 +/-    2.37       3.8 +/-    2.37  0.090 / 0.220
G30     153.5          32.7                5.6 +/-    0.93       9.2 +/-    0.93  0.040 / 0.020