PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/20-14:58:00
G01     302.3          36.7                6.1 +/-    2.20       9.4 +/-    2.20  0.070 / 0.060
G10     111.2          35.3                8.0 +/-    0.99      12.6 +/-    0.99  0.070 / 0.080
G11     274.4          27.9                5.9 +/-    1.95      10.8 +/-    1.95  0.050 / 0.050
G14     9.7            64.0                5.9 +/-    0.83       6.5 +/-    0.83  0.060 / 0.050
G18     262.9          51.2                8.7 +/-    4.51      10.9 +/-    4.51  0.030 / 0.040
G20     123.7          10.0                9.0 +/-    1.92      25.2 +/-    1.92  0.030 / 0.030
G22     312.1          32.0                6.0 +/-    2.06      10.1 +/-    2.06  0.040 / 0.050
G25     74.3           16.8                7.0 +/-    1.76      16.6 +/-    1.76  0.050 / 0.050
G31     168.1          68.0                7.0 +/-    0.48       7.5 +/-    0.48  0.190 / 0.180
G32     38.0           51.5                5.8 +/-    0.75       7.2 +/-    0.75  0.170 / 0.180