PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/15-08:27:50
G10     256.8          32.4                7.1 +/-    1.95      11.8 +/-    1.95  0.040 / 0.030
G13     47.7           25.0                4.7 +/-    1.60       9.2 +/-    1.60  0.060 / 0.040
G15     72.1           54.5                5.1 +/-    0.66       6.1 +/-    0.66  0.140 / 0.150
G20     280.3          55.3                6.5 +/-    2.72       7.8 +/-    2.72  0.130 / 0.210
G21     350.8          67.0                5.4 +/-    0.57       5.8 +/-    0.57  0.090 / 0.100
G26     266.1          12.5                7.3 +/-    1.05      19.4 +/-    1.05  0.080 / 0.080
G29     163.0          37.0                6.3 +/-    0.74       9.7 +/-    0.74  0.050 / 0.040