PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/22-10:58:00
G01     127.3          11.3                3.3 +/-   12.41       8.9 +/-   12.41  0.030 / 0.030
G07     51.9           69.5                4.7 +/-    0.53       5.0 +/-    0.53  0.030 / 0.020
G08     49.6           37.9                4.0 +/-    1.31       6.0 +/-    1.31  0.030 / 0.030
G09     176.1          34.1                5.4 +/-    1.16       8.7 +/-    1.16  0.030 / 0.030
G11     117.1          35.2                5.9 +/-    1.12       9.3 +/-    1.12  0.270 / 0.270
G13     321.1          11.6               -1.1 +/-   11.32      -2.9 +/-   11.32  0.190 / 0.200
G17     199.2          15.9                4.8 +/-    1.69      11.7 +/-    1.69  0.170 / 0.480
G18     103.5          16.4                3.9 +/-    2.27       9.3 +/-    2.27  0.220 / 0.250
G28     275.1          52.5                4.3 +/-    4.04       5.2 +/-    4.04  0.120 / 0.250
G30     330.2          58.7                3.2 +/-    0.33       3.7 +/-    0.33  0.140 / 0.200