PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-10:27:50
G08     276.2          19.1                4.3 +/-    0.93       9.8 +/-    0.93  0.180 / 0.390
G10     51.7           60.3                5.0 +/-    0.29       5.6 +/-    0.29  0.380 / 0.310
G11     315.5          12.6                1.7 +/-    9.10       4.5 +/-    9.10  0.050 / 0.060
G14     253.9          59.7                5.9 +/-    1.28       6.7 +/-    1.28  0.040 / 0.060
G18     314.8          26.8                3.9 +/-    1.30       7.4 +/-    1.30  0.170 / 0.310
G21     153.7          19.7                4.0 +/-    1.92       8.8 +/-    1.92  0.160 / 0.230
G24     41.8           13.5                2.2 +/-    4.30       5.8 +/-    4.30  0.110 / 0.390
G27     234.9          18.8                4.3 +/-    5.43       9.6 +/-    5.43  0.130 / 0.430
G31     177.9          27.1                5.8 +/-    0.84      10.7 +/-    0.84  0.110 / 0.190
G32     327.6          75.8                6.4 +/-    0.47       6.6 +/-    0.47  0.090 / 0.180