PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-13:42:40
G01     70.0           32.6                6.7 +/-    1.00      11.2 +/-    1.00  0.030 / 0.030
G07     137.5          27.8                8.8 +/-    1.68      16.1 +/-    1.68  0.030 / 0.030
G11     52.5           28.0                5.6 +/-    1.95      10.3 +/-    1.95  0.050 / 0.120
G13     276.4          36.7                8.4 +/-    1.17      12.9 +/-    1.17  0.070 / 0.100
G15     304.2          14.5                4.7 +/-    1.38      11.9 +/-    1.38  0.050 / 0.040
G17     236.2          72.3                8.0 +/-    0.64       8.4 +/-    0.64  0.050 / 0.040
G19     224.7          44.5                7.6 +/-    1.98      10.4 +/-    1.98  0.020 / 0.020
G28     20.9           59.0                5.9 +/-    1.88       6.8 +/-    1.88  0.020 / 0.020
G30     135.0          63.4                7.6 +/-    0.39       8.4 +/-    0.39  0.050 / 0.060