PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-11:58:30
G01     53.1           27.2                2.2 +/-    2.83       4.1 +/-    2.83  0.090 / 0.110
G06     179.5          20.6                5.5 +/-    2.83      11.9 +/-    2.83  0.070 / 0.100
G07     144.8          13.9                5.6 +/-    2.57      14.2 +/-    2.57  0.180 / 0.270
G11     45.2           16.3                3.2 +/-    2.18       7.8 +/-    2.18  0.120 / 0.210
G13     256.7          32.1                5.7 +/-    2.50       9.6 +/-    2.50  0.060 / 0.050
G15     288.2          16.1                4.3 +/-    2.02      10.5 +/-    2.02  0.060 / 0.040
G17     308.1          79.7                4.2 +/-    0.68       4.3 +/-    0.68  0.150 / 0.190
G19     242.5          59.0                5.7 +/-    2.28       6.5 +/-    2.28  0.120 / 0.230
G28     47.8           53.9                3.4 +/-    0.69       4.0 +/-    0.69  0.020 / 0.020
G30     147.8          46.2                6.2 +/-    0.94       8.3 +/-    0.94  0.040 / 0.030