PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-01:57:50
G01     39.1           13.3                2.7 +/-    3.25       6.9 +/-    3.25  0.100 / 0.110
G02     199.2          12.0                3.7 +/-    5.65      10.0 +/-    5.65  0.150 / 0.160
G06     177.9          39.0                6.7 +/-    1.08       9.9 +/-    1.08  0.030 / 0.020
G13     233.8          19.8                5.5 +/-    3.20      12.2 +/-    3.20  0.030 / 0.030
G15     267.3          10.8                4.2 +/-    1.74      11.5 +/-    1.74  0.180 / 0.230
G17     13.2           65.9                3.5 +/-    0.56       3.8 +/-    0.56  0.150 / 0.320
G19     286.6          70.1                3.7 +/-    0.75       3.9 +/-    0.75  0.050 / 0.050
G24     314.0          24.5                3.7 +/-    1.61       7.2 +/-    1.61  0.040 / 0.050
G28     73.4           47.5                5.2 +/-    1.17       6.8 +/-    1.17  0.050 / 0.070
G30     155.6          24.0                8.6 +/-    1.68      17.2 +/-    1.68  0.060 / 0.060