PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-09:12:50
G01     320.3          14.9               -3.1 +/-   25.38      -7.7 +/-   25.38  0.140 / 0.420
G08     261.4          15.6                3.3 +/-    1.50       8.0 +/-    1.50  0.140 / 0.400
G10     73.4           54.4                4.4 +/-    0.47       5.3 +/-    0.47  0.030 / 0.040
G11     306.4          21.3                2.7 +/-    1.66       5.7 +/-    1.66  0.030 / 0.030
G14     284.2          70.0                4.1 +/-    1.01       4.3 +/-    1.01  0.120 / 0.440
G18     307.6          38.8                3.9 +/-    1.10       5.8 +/-    1.10  0.120 / 0.440
G20     101.6          32.1                5.1 +/-    0.77       8.6 +/-    0.77  0.040 / 0.060
G27     228.5          12.3                2.3 +/-    2.92       6.1 +/-    2.92  0.040 / 0.060
G31     177.3          36.6                7.8 +/-    1.01      12.0 +/-    1.01  0.080 / 0.260
G32     342.8          72.3                5.1 +/-    0.60       5.3 +/-    0.60  0.090 / 0.230