PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-14:12:50
G01     221.1          11.7                9.3 +/-    1.67      25.0 +/-    1.67  0.030 / 0.050
G03     256.8          71.0                9.4 +/-    0.52       9.9 +/-    0.52  0.040 / 0.040
G09     298.5          12.1                5.1 +/-   15.95      13.6 +/-   15.95  0.100 / 0.190
G14     91.8           22.8                8.1 +/-    2.29      16.7 +/-    2.29  0.100 / 0.190
G16     136.5          53.0               10.9 +/-    0.69      13.3 +/-    0.69  0.030 / 0.030
G22     192.5          60.0               12.2 +/-    0.38      13.8 +/-    0.38  0.030 / 0.030
G23     316.7          47.2                9.1 +/-    1.03      11.9 +/-    1.03  0.050 / 0.040
G26     79.9           53.2                8.4 +/-    0.87      10.2 +/-    0.87  0.040 / 0.060
G31     49.0           23.9                6.5 +/-    3.10      13.1 +/-    3.10  0.120 / 0.310