PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/31-09:57:30
G01     48.0           23.7                2.7 +/-    0.49       5.4 +/-    0.49  0.050 / 0.060
G06     179.2          25.7                5.7 +/-    1.40      11.0 +/-    1.40  0.050 / 0.060
G11     43.9           11.9                2.0 +/-    2.18       5.4 +/-    2.18  0.030 / 0.030
G13     249.6          28.8                5.4 +/-    1.57       9.6 +/-    1.57  0.020 / 0.030
G15     281.3          15.4                4.8 +/-    1.48      11.9 +/-    1.48  0.140 / 0.300
G17     337.4          77.2                5.9 +/-    0.61       6.1 +/-    0.61  0.110 / 0.270
G19     253.4          63.9                5.2 +/-    0.72       5.7 +/-    0.72  0.120 / 0.190
G28     57.4           51.3                4.1 +/-    0.93       5.1 +/-    0.93  0.070 / 0.120
G30     150.7          38.7                7.8 +/-    0.68      11.5 +/-    0.68  0.050 / 0.110