PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/17-12:42:50
G01     57.0           28.9                4.1 +/-    1.33       7.4 +/-    1.33  0.040 / 0.050
G07     142.4          18.1                3.7 +/-    1.66       8.6 +/-    1.66  0.050 / 0.050
G11     47.4           23.3                3.9 +/-    2.02       7.8 +/-    2.02  0.030 / 0.020
G13     258.9          35.4                6.5 +/-    1.73      10.3 +/-    1.73  0.030 / 0.030
G15     292.6          16.1                4.1 +/-    2.07      10.0 +/-    2.07  0.150 / 0.150
G17     255.8          74.3                5.3 +/-    0.43       5.5 +/-    0.43  0.080 / 0.150
G18     40.5           11.2                4.8 +/-    2.29      13.0 +/-    2.29  0.130 / 0.270
G19     234.0          54.2                6.5 +/-    2.02       7.8 +/-    2.02  0.220 / 0.310
G28     27.3           59.2                3.6 +/-    0.54       4.1 +/-    0.54  0.080 / 0.070
G30     145.1          50.8                4.6 +/-    0.96       5.8 +/-    0.96  0.100 / 0.060