PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/29-07:27:50
G03     220.7          63.4                5.8 +/-    0.81       6.4 +/-    0.81  0.050 / 0.080
G07     253.7          15.0                3.8 +/-    3.94       9.5 +/-    3.94  0.050 / 0.060
G09     307.1          23.2                4.8 +/-    1.82       9.8 +/-    1.82  0.080 / 0.190
G14     104.7          10.5                4.1 +/-    2.08      11.4 +/-    2.08  0.070 / 0.230
G16     109.8          62.4                6.9 +/-    0.65       7.7 +/-    0.65  0.200 / 0.370
G22     192.3          47.9                5.8 +/-    0.72       7.5 +/-    0.72  0.180 / 0.350
G23     329.6          58.7                4.4 +/-    0.36       5.1 +/-    0.36  0.080 / 0.110
G26     59.5           47.1                4.6 +/-    1.05       6.0 +/-    1.05  0.100 / 0.110
G31     56.7           12.7                1.7 +/-    1.41       4.6 +/-    1.41  0.050 / 0.040