PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/22-08:57:50
G01     96.6           29.9                6.7 +/-    0.54      11.7 +/-    0.54  0.030 / 0.050
G07     120.0          48.9                7.6 +/-    1.33       9.7 +/-    1.33  0.040 / 0.060
G08     41.9           10.9                4.3 +/-    1.29      11.7 +/-    1.29  0.050 / 0.060
G11     75.0           40.4                6.6 +/-    0.75       9.5 +/-    0.75  0.040 / 0.050
G13     302.4          32.5                5.2 +/-    1.27       8.7 +/-    1.27  0.040 / 0.060
G17     210.3          50.0                8.6 +/-    0.92      10.9 +/-    0.92  0.030 / 0.060
G19     212.1          23.4                6.2 +/-    3.30      12.5 +/-    3.30  0.060 / 0.130
G28     339.0          61.8                5.0 +/-    0.57       5.5 +/-    0.57  0.050 / 0.120
G30     75.6           79.1                6.8 +/-    0.69       7.0 +/-    0.69  0.130 / 0.300