PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-21:57:40
G01     43.3           19.4                9.5 +/-    2.24      21.2 +/-    2.24  0.230 / 0.330
G06     177.9          31.4               13.1 +/-    1.65      22.3 +/-    1.65  0.350 / 0.370
G13     240.8          25.5               12.9 +/-    1.06      24.9 +/-    1.06  0.030 / 0.060
G15     274.3          13.8                9.4 +/-    1.01      24.0 +/-    1.01  0.040 / 0.060
G17     353.8          73.6               11.5 +/-    0.43      11.9 +/-    0.43  0.090 / 0.200
G19     264.0          66.7               12.2 +/-    0.88      13.2 +/-    0.88  0.090 / 0.210
G24     317.3          16.5                9.3 +/-    1.97      22.2 +/-    1.97  0.070 / 0.110
G28     60.3           52.1               12.1 +/-    0.81      14.8 +/-    0.81  0.090 / 0.090
G30     152.8          31.0               12.4 +/-    2.04      21.3 +/-    2.04  0.050 / 0.030