PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-04:58:00
G01     290.9          40.1                7.8 +/-    1.56      11.3 +/-    1.56  0.050 / 0.090
G03     311.4          14.6                6.8 +/-    1.95      16.9 +/-    1.95  0.050 / 0.110
G10     119.3          30.0                6.1 +/-    0.78      10.7 +/-    0.78  0.040 / 0.080
G11     262.9          27.2                9.4 +/-    1.50      17.6 +/-    1.50  0.050 / 0.070
G14     26.5           57.8                7.2 +/-    0.78       8.4 +/-    0.78  0.050 / 0.110
G22     313.7          38.3                7.3 +/-    1.14      10.9 +/-    1.14  0.050 / 0.090
G25     62.9           17.4                7.3 +/-    1.14      17.1 +/-    1.14  0.060 / 0.150
G26     158.3          12.0                8.1 +/-    1.76      21.7 +/-    1.76  0.060 / 0.160
G31     135.6          78.8                8.9 +/-    0.98       9.1 +/-    0.98  0.040 / 0.060
G32     49.4           43.6                6.3 +/-    0.57       8.7 +/-    0.57  0.040 / 0.050