PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-01:57:40
G02     37.1           51.5                8.0 +/-    0.57       9.9 +/-    0.57  0.040 / 0.040
G05     128.5          65.3                9.4 +/-    0.77      10.2 +/-    0.77  0.040 / 0.050
G06     54.7           15.5                7.0 +/-    1.16      17.1 +/-    1.16  0.020 / 0.050
G12     199.7          65.9               10.3 +/-    1.65      11.2 +/-    1.65  0.030 / 0.050
G25     289.9          56.2                7.7 +/-    1.08       9.1 +/-    1.08  0.030 / 0.040
G29     312.1          34.5                8.1 +/-    1.02      12.9 +/-    1.02  0.030 / 0.040