PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-21:57:30
G02     36.6           51.9                9.1 +/-    0.44      11.2 +/-    0.44  0.040 / 0.020
G05     128.2          65.6                9.6 +/-    0.58      10.5 +/-    0.58  0.050 / 0.020
G06     55.7           12.9                7.4 +/-    1.70      19.3 +/-    1.70  0.040 / 0.070
G12     197.5          64.8                8.8 +/-    0.93       9.6 +/-    0.93  0.040 / 0.060
G25     290.4          55.6                9.0 +/-    1.08      10.7 +/-    1.08  0.040 / 0.020
G29     311.1          32.7                8.5 +/-    0.97      14.1 +/-    0.97  0.040 / 0.020