PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/19-07:58:00
G01     43.1           19.1                3.2 +/-    1.04       7.3 +/-    1.04  0.060 / 0.090
G06     175.9          34.6                7.3 +/-    1.05      11.6 +/-    1.05  0.060 / 0.110
G13     240.5          24.7                5.3 +/-    1.31      10.4 +/-    1.31  0.160 / 0.300
G15     276.7          13.0                4.1 +/-    1.59      10.8 +/-    1.59  0.160 / 0.280
G17     0.8            71.9                6.2 +/-    0.82       6.5 +/-    0.82  0.070 / 0.220
G19     262.4          64.4                4.9 +/-    0.83       5.4 +/-    0.83  0.080 / 0.250
G24     316.3          19.9                4.0 +/-    2.59       8.8 +/-    2.59  0.040 / 0.040
G28     64.6           49.9                5.8 +/-    0.30       7.3 +/-    0.30  0.040 / 0.030
G30     154.0          32.9                9.4 +/-    0.66      15.5 +/-    0.66  0.040 / 0.070