PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-11:43:10
G01     70.3           32.7                4.2 +/-    0.82       7.0 +/-    0.82  0.070 / 0.100
G07     137.4          28.7                5.5 +/-    1.17      10.0 +/-    1.17  0.070 / 0.100
G11     52.9           28.7                3.9 +/-    2.18       7.1 +/-    2.18  0.030 / 0.020
G13     276.6          36.8                9.1 +/-    1.40      13.9 +/-    1.40  0.040 / 0.030
G15     303.5          15.0                3.4 +/-    1.53       8.5 +/-    1.53  0.060 / 0.080
G17     235.7          71.9                7.4 +/-    0.58       7.7 +/-    0.58  0.080 / 0.090
G19     224.6          44.2                7.9 +/-    2.36      10.7 +/-    2.36  0.030 / 0.030
G28     20.8           59.0                4.2 +/-    2.05       4.8 +/-    2.05  0.030 / 0.030
G30     134.9          62.9                6.2 +/-    0.47       6.9 +/-    0.47  0.040 / 0.100