PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-07:57:50
G01     71.0           32.9                4.4 +/-    1.11       7.4 +/-    1.11  0.040 / 0.040
G07     137.2          30.3                7.8 +/-    0.94      13.6 +/-    0.94  0.030 / 0.040
G11     54.0           30.3                5.2 +/-    1.74       9.0 +/-    1.74  0.070 / 0.090
G13     276.7          37.0                4.4 +/-    2.40       6.7 +/-    2.40  0.050 / 0.090
G15     302.7          15.5                1.5 +/-    1.41       3.7 +/-    1.41  0.030 / 0.020
G17     234.1          70.6                8.1 +/-    0.47       8.5 +/-    0.47  0.030 / 0.020
G19     224.2          43.3                8.1 +/-    2.69      11.2 +/-    2.69  0.090 / 0.190
G28     20.3           59.0                3.6 +/-    2.56       4.1 +/-    2.56  0.080 / 0.210
G30     134.6          61.5                8.1 +/-    0.40       9.1 +/-    0.40  0.050 / 0.080