PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-12:57:40
G01     225.3          16.9                6.8 +/-    2.69      16.2 +/-    2.69  0.120 / 0.260
G03     275.6          72.0                5.5 +/-    0.75       5.7 +/-    0.75  0.110 / 0.250
G14     86.9           23.4                6.0 +/-    1.30      12.1 +/-    1.30  0.040 / 0.070
G16     150.1          43.2                9.2 +/-    0.78      12.7 +/-    0.78  0.050 / 0.060
G22     204.3          68.2                6.5 +/-    0.58       7.0 +/-    0.58  0.030 / 0.040
G23     307.8          38.0                4.4 +/-    0.92       6.6 +/-    0.92  0.040 / 0.040
G26     101.0          54.8                6.7 +/-    0.89       8.0 +/-    0.89  0.030 / 0.050
G31     45.4           32.3                4.8 +/-    1.00       8.1 +/-    1.00  0.030 / 0.040