PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-11:28:00
G02     35.3           53.9                5.4 +/-    0.75       6.5 +/-    0.75  0.040 / 0.050
G05     139.7          62.1                7.7 +/-    0.95       8.6 +/-    0.95  0.030 / 0.040
G06     52.3           20.8                1.9 +/-    1.14       4.0 +/-    1.14  0.100 / 0.290
G12     203.4          68.7                6.0 +/-    0.38       6.4 +/-    0.38  0.120 / 0.310
G20     199.6          24.1                5.6 +/-    1.51      11.1 +/-    1.51  0.030 / 0.030
G25     296.6          53.7                6.0 +/-    0.67       7.3 +/-    0.67  0.020 / 0.040
G29     309.4          31.5                5.0 +/-    0.86       8.5 +/-    0.86  0.080 / 0.170