PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-00:27:40
G01     87.3           32.4                6.5 +/-    1.32      10.9 +/-    1.32  0.050 / 0.040
G07     127.7          43.7               10.0 +/-    0.73      13.8 +/-    0.73  0.040 / 0.040
G11     69.1           40.7                6.0 +/-    1.20       8.6 +/-    1.20  0.070 / 0.090
G13     292.5          36.2                8.3 +/-    1.95      12.9 +/-    1.95  0.070 / 0.100
G15     313.1          11.6                6.0 +/-    2.38      16.1 +/-    2.38  0.030 / 0.060
G17     216.9          53.9               10.7 +/-    0.97      12.9 +/-    0.97  0.030 / 0.040
G19     215.8          29.5               10.6 +/-    2.66      18.7 +/-    2.66  0.040 / 0.060
G28     355.3          61.5                6.6 +/-    0.84       7.4 +/-    0.84  0.060 / 0.070
G30     115.5          70.2                9.7 +/-    0.64      10.3 +/-    0.64  0.080 / 0.110