PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-12:27:50
G01     237.4          27.8               19.6 +/-    1.14      36.1 +/-    1.14  0.050 / 0.050
G03     308.6          61.2                5.9 +/-    1.04       6.6 +/-    1.04  0.040 / 0.070
G14     72.9           32.7                6.8 +/-    2.91      11.3 +/-    2.91  0.120 / 0.130
G16     159.4          28.0                6.3 +/-    2.13      11.5 +/-    2.13  0.150 / 0.110
G18     210.4          16.7                5.2 +/-    2.04      12.3 +/-    2.04  0.040 / 0.030
G22     256.2          77.3                7.4 +/-    0.35       7.5 +/-    0.35  0.030 / 0.030
G23     296.3          27.7                4.7 +/-    1.72       8.7 +/-    1.72  0.100 / 0.150
G26     125.9          47.2                7.8 +/-    0.55      10.2 +/-    0.55  0.060 / 0.130
G31     41.2           46.3                4.6 +/-    0.86       6.1 +/-    0.86  0.080 / 0.170
G32     85.6           19.1                4.8 +/-    2.45      10.8 +/-    2.45  0.080 / 0.130