PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/20-06:27:50
G01     114.0          19.8                4.2 +/-    1.62       9.2 +/-    1.62  0.030 / 0.030
G07     90.3           63.8                5.3 +/-    1.17       5.8 +/-    1.17  0.030 / 0.030
G08     43.9           29.2                3.5 +/-    1.77       6.3 +/-    1.77  0.060 / 0.120
G09     174.8          21.0                4.7 +/-    3.82      10.2 +/-    3.82  0.120 / 0.120
G11     105.0          42.7                6.5 +/-    0.50       9.1 +/-    0.50  0.190 / 0.200
G13     315.3          23.5                3.5 +/-    1.46       7.1 +/-    1.46  0.250 / 0.280
G17     202.0          27.2                4.6 +/-    2.67       8.6 +/-    2.67  0.030 / 0.040
G28     287.4          53.6                4.8 +/-    2.74       5.8 +/-    2.74  0.030 / 0.030
G30     346.0          69.9                4.4 +/-    0.67       4.7 +/-    0.67  0.100 / 0.070