PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-13:42:50
G01     123.4          14.4                7.5 +/-    1.67      19.0 +/-    1.67  0.090 / 0.150
G07     72.3           66.1                6.4 +/-    0.77       7.0 +/-    0.77  0.090 / 0.130
G08     47.1           34.3                6.4 +/-    0.44      10.2 +/-    0.44  0.030 / 0.040
G09     176.2          30.2                6.8 +/-    1.10      11.9 +/-    1.10  0.040 / 0.050
G11     110.2          36.1                8.4 +/-    1.01      13.1 +/-    1.01  0.160 / 0.300
G13     320.7          13.3                4.3 +/-    1.51      11.0 +/-    1.51  0.180 / 0.280
G17     199.8          21.3                8.2 +/-    1.15      17.4 +/-    1.15  0.030 / 0.030
G28     283.4          54.9                6.9 +/-    1.22       8.2 +/-    1.22  0.030 / 0.040
G30     335.1          61.9                6.6 +/-    0.55       7.4 +/-    0.55  0.090 / 0.310