PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-07:28:10
G01     85.0           32.7                4.7 +/-    1.60       7.8 +/-    1.60  0.040 / 0.050
G07     129.2          40.8                7.8 +/-    0.56      11.2 +/-    0.56  0.040 / 0.040
G11     64.1           37.2                6.3 +/-    1.07       9.6 +/-    1.07  0.040 / 0.050
G13     291.2          36.2                6.1 +/-    0.78       9.4 +/-    0.78  0.040 / 0.050
G15     312.2          12.0                4.0 +/-    2.69      10.8 +/-    2.69  0.120 / 0.350
G17     218.1          59.5                7.8 +/-    1.12       8.9 +/-    1.12  0.140 / 0.250
G19     216.7          32.5                6.8 +/-    2.75      11.4 +/-    2.75  0.050 / 0.040
G28     358.9          61.2                5.2 +/-    0.48       5.9 +/-    0.48  0.060 / 0.050
G30     115.9          72.1                7.0 +/-    0.74       7.4 +/-    0.74  0.090 / 0.120