PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-10:12:50
G01     316.8          23.5                3.7 +/-    1.43       7.4 +/-    1.43  0.090 / 0.160
G10     88.9           48.6                3.8 +/-    1.39       4.9 +/-    1.39  0.180 / 0.170
G11     296.6          25.8                5.9 +/-    2.57      11.4 +/-    2.57  0.040 / 0.040
G14     318.3          71.6                4.3 +/-    0.59       4.5 +/-    0.59  0.050 / 0.040
G18     296.7          46.1                4.7 +/-    7.47       6.3 +/-    7.47  0.090 / 0.140
G20     110.4          24.6                4.6 +/-    2.16       9.1 +/-    2.16  0.080 / 0.180
G22     305.1          18.9                3.5 +/-    0.86       7.9 +/-    0.86  0.050 / 0.060
G25     95.4           10.7              -13.1 +/-   24.54     -35.9 +/-   24.54  0.050 / 0.060
G31     175.0          47.9                6.0 +/-    1.01       7.8 +/-    1.01  0.030 / 0.020
G32     7.5            66.4                4.3 +/-    0.72       4.7 +/-    0.72  0.030 / 0.030