PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-03:43:00
G01     315.1          24.9                8.5 +/-    2.50      16.6 +/-    2.50  0.050 / 0.020
G10     91.3           49.1                8.3 +/-    1.14      10.6 +/-    1.14  0.040 / 0.020
G11     293.0          28.0                7.3 +/-    1.14      13.3 +/-    1.14  0.030 / 0.030
G14     330.2          70.9                6.8 +/-    0.61       7.2 +/-    0.61  0.030 / 0.040
G18     108.3          24.0                7.6 +/-    1.73      15.3 +/-    1.73  0.140 / 0.290
G22     304.6          16.8                7.7 +/-    3.11      18.4 +/-    3.11  0.130 / 0.180
G25     89.6           12.1                9.2 +/-    1.20      24.6 +/-    1.20  0.040 / 0.040
G31     174.7          50.8                8.8 +/-    0.37      11.0 +/-    0.37  0.040 / 0.040
G32     18.4           62.5                7.7 +/-    0.81       8.5 +/-    0.81  0.150 / 0.270