PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/09-14:28:00
G01     81.3           32.9                7.8 +/-    0.67      13.0 +/-    0.67  0.030 / 0.030
G07     131.5          36.0                8.7 +/-    0.49      13.5 +/-    0.49  0.030 / 0.030
G11     59.7           33.7                7.4 +/-    0.83      12.0 +/-    0.83  0.060 / 0.080
G13     288.2          36.5                8.4 +/-    2.04      13.0 +/-    2.04  0.060 / 0.080
G15     312.5          11.3                5.5 +/-    1.32      14.8 +/-    1.32  0.040 / 0.050
G17     220.9          63.4               11.7 +/-    0.57      12.9 +/-    0.57  0.040 / 0.050
G19     218.2          35.6               11.1 +/-    0.60      17.4 +/-    0.60  0.060 / 0.100
G28     3.3            60.8                8.4 +/-    0.38       9.4 +/-    0.38  0.060 / 0.090
G30     119.4          72.5                9.4 +/-    0.96       9.8 +/-    0.96  0.050 / 0.120