PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/26-22:27:50
G01     118.1          18.1                9.3 +/-    1.90      21.4 +/-    1.90  0.030 / 0.030
G07     89.0           62.5                9.5 +/-    0.32      10.6 +/-    0.32  0.040 / 0.040
G08     44.0           29.0                6.4 +/-    1.70      11.5 +/-    1.70  0.080 / 0.070
G09     176.9          25.7                8.6 +/-    1.22      16.5 +/-    1.22  0.060 / 0.060
G11     103.5          40.6                9.0 +/-    0.82      13.0 +/-    0.82  0.090 / 0.150
G13     317.1          20.6                6.1 +/-    1.99      13.2 +/-    1.99  0.100 / 0.170
G17     200.7          27.1               10.4 +/-    1.77      19.4 +/-    1.77  0.200 / 0.370
G18     89.7           20.7                8.4 +/-    2.11      18.2 +/-    2.11  0.120 / 0.390
G28     288.8          55.5                9.3 +/-    2.17      11.1 +/-    2.17  0.110 / 0.180
G30     347.7          69.4                8.2 +/-    0.78       8.7 +/-    0.78  0.100 / 0.180