PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-20:42:40
G02     342.4          78.4                9.8 +/-    0.53      10.0 +/-    0.53  0.120 / 0.070
G05     163.6          34.0               14.3 +/-    2.00      23.0 +/-    2.00  0.140 / 0.090
G06     41.1           40.6                8.9 +/-    1.02      12.8 +/-    1.02  0.030 / 0.030
G12     312.6          69.0                8.9 +/-    0.57       9.5 +/-    0.57  0.030 / 0.040
G17     85.1           12.5                9.1 +/-    1.09      24.0 +/-    1.09  0.220 / 0.120
G19     75.3           26.0               10.1 +/-    2.17      19.3 +/-    2.17  0.120 / 0.090
G24     228.2          22.5               12.1 +/-    2.51      25.2 +/-    2.51  0.040 / 0.020
G25     317.0          28.4                9.5 +/-    1.18      17.2 +/-    1.18  0.050 / 0.020