PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/18-12:28:00
G02     55.5           34.9                3.3 +/-    1.56       5.2 +/-    1.56  0.030 / 0.020
G05     73.5           68.5                4.2 +/-    0.52       4.5 +/-    0.52  0.020 / 0.020
G12     182.4          36.7                5.3 +/-    1.00       8.1 +/-    1.00  0.040 / 0.070
G13     131.1          10.9                4.7 +/-    8.46      12.9 +/-    8.46  0.050 / 0.060
G21     267.0          13.6                4.3 +/-    1.69      11.1 +/-    1.69  0.040 / 0.050
G25     246.8          55.7                5.1 +/-    1.70       6.1 +/-    1.70  0.040 / 0.040
G29     324.0          47.9                3.7 +/-    0.57       4.8 +/-    0.57  0.170 / 0.270