PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-14:28:10
G03     213.5          63.2                9.7 +/-    0.95      10.8 +/-    0.95  0.170 / 0.330
G07     252.8          15.7                6.4 +/-    2.11      15.8 +/-    2.11  0.160 / 0.380
G09     305.8          21.0                5.7 +/-    1.56      12.2 +/-    1.56  0.040 / 0.050
G14     103.8          10.3                9.8 +/-    2.92      27.2 +/-    2.92  0.040 / 0.050
G16     124.4          61.5               10.3 +/-    0.44      11.5 +/-    0.44  0.240 / 0.300
G22     186.5          45.7               10.4 +/-    0.44      13.8 +/-    0.44  0.250 / 0.440
G23     323.4          53.3                8.8 +/-    0.83      10.6 +/-    0.83  0.160 / 0.330
G26     64.8           51.0                8.0 +/-    0.79      10.0 +/-    0.79  0.120 / 0.210
G31     54.9           16.3                7.2 +/-    2.82      17.3 +/-    2.82  0.040 / 0.070