PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-11:27:40
G01     126.5          10.8                0.6 +/-   23.97       1.7 +/-   23.97  0.130 / 0.110
G07     59.1           68.0                4.5 +/-    0.66       4.8 +/-    0.66  0.110 / 0.140
G08     53.3           43.5                2.7 +/-    1.04       3.8 +/-    1.04  0.020 / 0.030
G09     178.4          37.8                4.7 +/-    1.04       7.1 +/-    1.04  0.030 / 0.030
G11     119.6          35.7                5.2 +/-    1.00       8.1 +/-    1.00  0.190 / 0.360
G13     320.9          12.1                2.9 +/-    6.50       7.7 +/-    6.50  0.050 / 0.080
G17     200.5          10.6               -8.2 +/-    8.54     -22.7 +/-    8.54  0.050 / 0.070
G18     103.6          16.2                3.0 +/-    2.18       7.1 +/-    2.18  0.160 / 0.300
G28     268.4          47.3                6.8 +/-    3.49       8.8 +/-    3.49  0.140 / 0.280
G30     332.3          60.5                3.7 +/-    0.59       4.1 +/-    0.59  0.040 / 0.060