PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-20:27:50
G01     56.7           29.0               24.4 +/-    1.16      43.6 +/-    1.16  0.050 / 0.040
G07     142.6          13.7               14.4 +/-    2.44      36.8 +/-    2.44  0.040 / 0.040
G11     46.4           20.7                9.8 +/-    3.03      21.3 +/-    3.03  0.110 / 0.280
G13     258.1          34.8               15.7 +/-    1.16      24.9 +/-    1.16  0.090 / 0.220
G15     290.2          16.6               12.5 +/-    1.87      29.8 +/-    1.87  0.060 / 0.050
G17     272.7          78.6               14.9 +/-    0.65      15.2 +/-    0.65  0.050 / 0.060
G19     235.2          53.7               15.5 +/-    1.94      18.7 +/-    1.94  0.080 / 0.120
G28     33.1           58.0               11.9 +/-    0.36      13.7 +/-    0.36  0.100 / 0.140
G30     145.3          47.5               15.3 +/-    0.56      19.9 +/-    0.56  0.060 / 0.090