PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-09:43:20
G01     320.5          14.2              -11.4 +/-   32.74     -29.0 +/-   32.74  0.220 / 0.280
G08     261.9          16.0                5.7 +/-    2.89      13.9 +/-    2.89  0.130 / 0.410
G10     72.1           54.9                4.9 +/-    0.36       5.8 +/-    0.36  0.100 / 0.260
G11     306.9          20.9                6.2 +/-    4.44      13.2 +/-    4.44  0.090 / 0.310
G14     282.0          69.8                6.1 +/-    0.73       6.4 +/-    0.73  0.030 / 0.040
G18     308.1          38.3                5.5 +/-    0.78       8.3 +/-    0.78  0.030 / 0.040
G20     100.9          32.6                5.7 +/-    1.17       9.5 +/-    1.17  0.130 / 0.340
G27     229.1          12.8                6.3 +/-    2.50      16.4 +/-    2.50  0.090 / 0.250
G31     177.6          35.5                8.2 +/-    1.15      12.8 +/-    1.15  0.040 / 0.050
G32     339.0          72.7                7.0 +/-    0.72       7.3 +/-    0.72  0.050 / 0.050