PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-13:28:00
G01     129.2          9.8               -13.7 +/-   28.29     -38.3 +/-   28.29  0.030 / 0.030
G07     43.6           69.8                8.8 +/-    0.69       9.3 +/-    0.69  0.030 / 0.030
G08     52.5           41.4                7.2 +/-    1.11      10.2 +/-    1.11  0.030 / 0.030
G09     177.2          37.7                8.8 +/-    0.94      13.4 +/-    0.94  0.030 / 0.030
G11     120.8          33.7               10.2 +/-    1.07      16.5 +/-    1.07  0.160 / 0.360
G17     199.7          12.0                1.6 +/-   15.18       4.4 +/-   15.18  0.160 / 0.250
G18     106.2          15.2                9.9 +/-    1.69      24.6 +/-    1.69  0.230 / 0.320
G28     271.8          51.3                8.7 +/-    3.18      10.8 +/-    3.18  0.050 / 0.070
G30     328.8          57.5                8.1 +/-    0.60       9.4 +/-    0.60  0.070 / 0.070