PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-15:12:40
G01     222.8          13.4               10.6 +/-    3.73      27.4 +/-    3.73  0.160 / 0.180
G03     262.9          71.4                8.4 +/-    0.65       8.8 +/-    0.65  0.120 / 0.180
G14     89.9           23.8                8.6 +/-    1.16      17.3 +/-    1.16  0.050 / 0.060
G16     140.1          50.7               10.7 +/-    0.47      13.4 +/-    0.47  0.070 / 0.070
G22     196.7          63.4                8.8 +/-    0.78       9.7 +/-    0.78  0.040 / 0.040
G23     314.0          44.6                8.2 +/-    0.67      11.1 +/-    0.67  0.040 / 0.040
G26     84.7           53.7                8.4 +/-    0.63      10.2 +/-    0.63  0.160 / 0.620
G31     47.9           26.1                6.4 +/-    2.92      12.3 +/-    2.92  0.150 / 0.630