PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-12:27:50
G01     248.3          34.8                7.5 +/-    2.20      11.9 +/-    2.20  0.080 / 0.100
G03     315.6          51.1                4.8 +/-    1.01       6.0 +/-    1.01  0.080 / 0.100
G14     62.2           39.3                5.3 +/-    0.64       7.9 +/-    0.64  0.050 / 0.080
G16     164.7          17.5               -7.7 +/-    5.40     -18.1 +/-    5.40  0.050 / 0.060
G18     217.3          25.3                4.7 +/-    2.78       9.1 +/-    2.78  0.040 / 0.030
G22     297.1          72.4                6.7 +/-    0.47       7.0 +/-    0.47  0.040 / 0.020
G23     288.0          20.7                2.4 +/-    6.47       5.2 +/-    6.47  0.060 / 0.090
G26     138.1          38.5                7.1 +/-    0.65      10.6 +/-    0.65  0.060 / 0.080
G31     41.1           57.5                5.6 +/-    0.75       6.6 +/-    0.75  0.100 / 0.100
G32     76.1           26.1                5.6 +/-    1.82      10.7 +/-    1.82  0.150 / 0.090