PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-13:58:10
G01     68.0           32.3                7.6 +/-    1.36      12.7 +/-    1.36  0.090 / 0.260
G07     138.5          26.2                7.7 +/-    2.74      14.6 +/-    2.74  0.090 / 0.220
G11     51.4           26.7                5.3 +/-    1.80      10.0 +/-    1.80  0.030 / 0.030
G13     274.2          36.5                7.9 +/-    0.80      12.3 +/-    0.80  0.040 / 0.030
G15     302.8          14.8                3.7 +/-    2.21       9.2 +/-    2.21  0.050 / 0.120
G17     240.4          73.7                8.2 +/-    0.43       8.5 +/-    0.43  0.070 / 0.120
G19     226.2          46.1                8.2 +/-    2.12      10.9 +/-    2.12  0.020 / 0.030
G28     23.9           58.6                8.4 +/-    3.27       9.7 +/-    3.27  0.030 / 0.020
G30     136.9          61.7                7.3 +/-    0.59       8.2 +/-    0.59  0.060 / 0.070