PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-14:42:40
G03     215.8          64.3                8.2 +/-    1.01       9.0 +/-    1.01  0.090 / 0.270
G07     251.9          14.9                5.6 +/-    2.51      14.0 +/-    2.51  0.090 / 0.260
G09     305.2          20.2                4.5 +/-    1.00       9.9 +/-    1.00  0.180 / 0.350
G14     103.0          11.0                8.5 +/-    0.81      23.2 +/-    0.81  0.140 / 0.330
G16     127.0          60.7               10.0 +/-    0.57      11.2 +/-    0.57  0.170 / 0.220
G23     322.4          52.3                7.2 +/-    0.67       8.9 +/-    0.67  0.120 / 0.260
G26     66.4           51.7                6.0 +/-    1.20       7.4 +/-    1.20  0.040 / 0.050
G31     54.2           17.2                5.9 +/-    1.99      14.0 +/-    1.99  0.040 / 0.060