PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-20:57:40
G01     118.0          18.1               12.4 +/-    1.24      28.5 +/-    1.24  0.040 / 0.030
G07     90.0           61.8               12.2 +/-    0.94      13.6 +/-    0.94  0.040 / 0.030
G08     44.1           29.3                9.1 +/-    1.46      16.2 +/-    1.46  0.100 / 0.120
G09     177.2          26.1               12.7 +/-    1.42      24.3 +/-    1.42  0.110 / 0.150
G11     103.6          40.7               12.3 +/-    0.70      17.8 +/-    0.70  0.090 / 0.230
G13     317.0          20.8                8.7 +/-    2.26      18.9 +/-    2.26  0.080 / 0.180
G17     200.8          26.7               13.9 +/-    1.30      26.1 +/-    1.30  0.090 / 0.070
G18     90.3           20.8               11.1 +/-    1.83      24.0 +/-    1.83  0.050 / 0.080
G28     288.3          55.2                9.8 +/-    2.31      11.7 +/-    2.31  0.030 / 0.020
G30     349.2          69.9               10.0 +/-    0.65      10.6 +/-    0.65  0.040 / 0.030