PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-03:12:50
G01     86.9           31.0                5.4 +/-    1.07       9.3 +/-    1.07  0.030 / 0.020
G07     125.3          45.8                7.5 +/-    0.74      10.0 +/-    0.74  0.030 / 0.030
G11     72.0           43.7                6.1 +/-    0.73       8.4 +/-    0.73  0.090 / 0.190
G13     293.0          37.6                1.7 +/-    4.63       2.6 +/-    4.63  0.180 / 0.230
G15     312.6          12.2                4.7 +/-    3.11      12.5 +/-    3.11  0.040 / 0.050
G17     212.9          54.9                7.2 +/-    0.66       8.5 +/-    0.66  0.040 / 0.050
G19     213.4          29.7                6.8 +/-    1.46      12.0 +/-    1.46  0.060 / 0.070
G28     330.0          60.6                4.4 +/-    0.48       5.0 +/-    0.48  0.050 / 0.080
G30     94.5           80.2                5.6 +/-    0.56       5.7 +/-    0.56  0.040 / 0.040