PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-13:57:50
G01     227.1          17.7                8.9 +/-    3.49      20.7 +/-    3.49  0.060 / 0.210
G03     284.6          69.2               11.2 +/-    1.00      11.9 +/-    1.00  0.060 / 0.180
G14     84.1           28.1                8.9 +/-    0.67      16.2 +/-    0.67  0.060 / 0.090
G16     145.8          45.0               14.3 +/-    1.02      19.2 +/-    1.02  0.050 / 0.100
G22     202.2          68.9               10.6 +/-    1.12      11.3 +/-    1.12  0.180 / 0.300
G23     309.7          40.9                9.4 +/-    1.20      13.5 +/-    1.20  0.130 / 0.410
G26     95.8           53.6               11.7 +/-    0.66      14.1 +/-    0.66  0.040 / 0.070
G31     45.5           31.0                8.4 +/-    0.54      14.4 +/-    0.54  0.040 / 0.070