PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-21:12:50
G01     66.0           32.2               12.7 +/-    1.69      21.3 +/-    1.69  0.310 / 0.370
G07     139.8          27.7               15.8 +/-    1.38      29.0 +/-    1.38  0.410 / 0.400
G11     51.9           29.0               11.3 +/-    1.60      20.3 +/-    1.60  0.130 / 0.270
G13     269.6          36.7               14.1 +/-    2.19      21.7 +/-    2.19  0.150 / 0.250
G15     298.9          16.0               11.0 +/-    2.86      26.6 +/-    2.86  0.060 / 0.100
G17     238.9          68.0               15.4 +/-    0.55      16.5 +/-    0.55  0.080 / 0.120
G18     46.3           16.4                9.9 +/-    1.84      23.8 +/-    1.84  0.050 / 0.050
G19     227.5          44.8               16.4 +/-    2.57      22.1 +/-    2.57  0.050 / 0.070
G28     27.4           58.1               15.1 +/-    0.89      17.5 +/-    0.89  0.070 / 0.130
G30     139.3          56.1               15.9 +/-    0.50      18.7 +/-    0.50  0.080 / 0.130