PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-10:12:50
G01     313.8          27.8                4.8 +/-    1.08       8.7 +/-    1.08  0.090 / 0.140
G10     96.1           45.0                5.8 +/-    1.24       7.8 +/-    1.24  0.130 / 0.130
G11     290.8          27.2                5.5 +/-    1.67      10.3 +/-    1.67  0.080 / 0.130
G14     335.6          70.5                5.3 +/-    0.98       5.6 +/-    0.98  0.080 / 0.130
G18     289.0          48.8                6.5 +/-    3.64       8.3 +/-    3.64  0.040 / 0.040
G20     114.6          20.5                3.6 +/-    1.44       7.9 +/-    1.44  0.040 / 0.040
G22     307.5          22.9                4.6 +/-    3.08       9.5 +/-    3.08  0.090 / 0.240
G25     90.4           13.0                3.9 +/-    2.10      10.1 +/-    2.10  0.080 / 0.210
G31     172.9          54.2                8.3 +/-    0.38      10.0 +/-    0.38  0.050 / 0.040
G32     17.6           62.6                5.3 +/-    0.56       5.9 +/-    0.56  0.050 / 0.050