PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-13:58:10
G01     120.5          16.6                8.3 +/-    1.01      19.9 +/-    1.01  0.040 / 0.050
G07     81.0           64.5                9.3 +/-    0.56      10.2 +/-    0.56  0.040 / 0.040
G08     45.4           31.4                6.7 +/-    0.61      11.5 +/-    0.61  0.110 / 0.440
G09     175.9          26.7                9.3 +/-    2.17      17.5 +/-    2.17  0.120 / 0.370
G11     106.0          37.6                8.9 +/-    1.48      13.5 +/-    1.48  0.140 / 0.140
G13     319.5          16.1                3.9 +/-    2.46       9.3 +/-    2.46  0.110 / 0.190
G17     200.5          24.9                7.9 +/-    1.60      15.5 +/-    1.60  0.030 / 0.050
G28     289.4          56.4                7.1 +/-    0.69       8.4 +/-    0.69  0.040 / 0.050
G30     339.5          64.8                7.5 +/-    1.07       8.2 +/-    1.07  0.090 / 0.160