PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/08-08:42:40
G01     104.1          27.0                6.1 +/-    1.34      11.4 +/-    1.34  0.030 / 0.030
G07     111.8          55.0                8.5 +/-    0.45      10.2 +/-    0.45  0.030 / 0.020
G08     41.4           15.8                4.5 +/-    2.32      11.1 +/-    2.32  0.040 / 0.030
G11     82.9           42.3                8.4 +/-    0.92      11.8 +/-    0.92  0.030 / 0.040
G13     307.0          30.8                8.0 +/-    1.68      13.8 +/-    1.68  0.070 / 0.170
G17     206.3          42.9               10.7 +/-    0.66      14.9 +/-    0.66  0.080 / 0.140
G18     75.3           24.1                5.1 +/-    1.59      10.1 +/-    1.59  0.080 / 0.210
G19     210.4          12.1                4.0 +/-    8.10      10.8 +/-    8.10  0.090 / 0.270
G28     321.2          61.1                6.1 +/-    0.95       6.8 +/-    0.95  0.120 / 0.350
G30     28.1           79.3                6.9 +/-    0.48       7.0 +/-    0.48  0.140 / 0.280