PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-14:12:40
G01     80.6           32.9                4.2 +/-    1.69       6.9 +/-    1.69  0.220 / 0.290
G07     131.9          35.5                7.4 +/-    0.99      11.6 +/-    0.99  0.180 / 0.280
G11     59.2           33.4                6.6 +/-    0.63      10.7 +/-    0.63  0.030 / 0.030
G13     287.5          36.6                6.1 +/-    1.11       9.5 +/-    1.11  0.030 / 0.030
G15     311.9          11.6                4.4 +/-    2.92      11.8 +/-    2.92  0.050 / 0.070
G17     221.7          64.0                8.8 +/-    1.26       9.7 +/-    1.26  0.040 / 0.060
G19     218.6          36.2                8.3 +/-    1.93      12.8 +/-    1.93  0.040 / 0.090
G28     4.5            60.7                4.3 +/-    0.80       4.8 +/-    0.80  0.050 / 0.080
G30     120.9          71.9                6.6 +/-    0.86       6.9 +/-    0.86  0.050 / 0.090