PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/09-21:27:40
G02     31.5           56.7                7.9 +/-    0.57       9.2 +/-    0.57  0.050 / 0.050
G05     139.1          62.0               10.0 +/-    0.62      11.1 +/-    0.62  0.040 / 0.040
G06     54.0           14.7                6.9 +/-    1.23      17.4 +/-    1.23  0.040 / 0.050
G12     193.3          66.3                8.3 +/-    1.48       9.0 +/-    1.48  0.040 / 0.040
G19     98.8           12.2                9.3 +/-    1.89      24.8 +/-    1.89  0.030 / 0.050
G25     297.4          53.4                8.1 +/-    0.59       9.8 +/-    0.59  0.050 / 0.050
G29     306.5          26.5                6.8 +/-    1.08      12.9 +/-    1.08  0.040 / 0.060