PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-13:58:10
G03     221.0          66.9               10.2 +/-    1.08      11.0 +/-    1.08  0.040 / 0.060
G07     249.7          13.1                7.0 +/-    1.48      18.2 +/-    1.48  0.060 / 0.070
G09     303.4          17.7                8.1 +/-    1.83      18.9 +/-    1.83  0.090 / 0.330
G14     100.4          13.1               11.2 +/-    1.07      29.2 +/-    1.07  0.190 / 0.500
G16     131.9          58.4               11.4 +/-    0.56      13.2 +/-    0.56  0.050 / 0.050
G22     189.2          51.0               11.6 +/-    1.00      14.4 +/-    1.00  0.050 / 0.050
G23     320.1          50.0                8.5 +/-    1.28      10.7 +/-    1.28  0.030 / 0.050
G26     70.9           53.0                8.2 +/-    0.93       9.9 +/-    0.93  0.040 / 0.050
G31     52.7           19.3                7.8 +/-    0.99      17.5 +/-    0.99  0.140 / 0.350