PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-11:57:50
G01     62.9           31.3                4.7 +/-    0.61       7.9 +/-    0.61  0.060 / 0.120
G06     181.6          11.8                0.0 +/-   24.09       0.0 +/-   24.09  0.070 / 0.110
G07     140.8          22.8                5.7 +/-    2.33      11.7 +/-    2.33  0.030 / 0.030
G11     49.1           24.0                3.5 +/-    2.25       7.1 +/-    2.25  0.040 / 0.030
G13     268.4          35.6                9.1 +/-    1.73      14.3 +/-    1.73  0.070 / 0.130
G15     297.6          16.0                5.3 +/-    1.92      12.8 +/-    1.92  0.060 / 0.120
G17     254.8          77.0                7.4 +/-    0.41       7.5 +/-    0.41  0.020 / 0.030
G19     230.4          50.2                9.1 +/-    1.96      11.4 +/-    1.96  0.020 / 0.020
G28     32.0           57.2                4.3 +/-    0.87       5.0 +/-    0.87  0.080 / 0.060
G30     141.2          56.4                6.7 +/-    0.59       7.9 +/-    0.59  0.060 / 0.060