PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-14:27:50
G03     198.7          47.0               10.9 +/-    1.44      14.3 +/-    1.44  0.030 / 0.050
G07     266.1          26.1               10.8 +/-    1.81      20.6 +/-    1.81  0.040 / 0.050
G09     313.7          33.9                7.4 +/-    1.47      12.0 +/-    1.47  0.060 / 0.160
G16     81.1           64.7                9.1 +/-    0.56       9.9 +/-    0.56  0.060 / 0.150
G22     183.0          30.0                8.1 +/-    1.94      14.1 +/-    1.94  0.040 / 0.050
G23     339.3          67.5                7.8 +/-    0.95       8.3 +/-    0.95  0.040 / 0.060
G26     49.1           38.7                7.5 +/-    0.78      11.1 +/-    0.78  0.130 / 0.190
G27     129.5          15.5               10.9 +/-    1.19      26.7 +/-    1.19  0.090 / 0.180