PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/24-12:58:00
G01     126.9          11.8                7.5 +/-    2.95      20.2 +/-    2.95  0.040 / 0.030
G07     53.3           69.5                6.4 +/-    0.45       6.8 +/-    0.45  0.030 / 0.030
G08     49.9           38.6                6.0 +/-    1.10       9.0 +/-    1.10  0.030 / 0.030
G09     176.7          34.2                7.7 +/-    2.05      12.4 +/-    2.05  0.020 / 0.020
G11     117.3          35.5                6.8 +/-    0.82      10.7 +/-    0.82  0.200 / 0.260
G13     321.0          12.0                2.3 +/-    6.52       6.1 +/-    6.52  0.240 / 0.260
G17     199.8          15.3                4.8 +/-    2.13      11.8 +/-    2.13  0.240 / 0.380
G18     103.3          16.7                5.7 +/-    2.07      13.5 +/-    2.07  0.090 / 0.290
G28     276.3          52.9                5.8 +/-    3.78       7.0 +/-    3.78  0.150 / 0.210
G30     331.8          59.9                4.6 +/-    0.91       5.2 +/-    0.91  0.130 / 0.230