PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-00:28:00
G01     89.6           32.0                8.5 +/-    0.81      14.4 +/-    0.81  0.050 / 0.070
G07     125.9          45.4                9.2 +/-    0.85      12.3 +/-    0.85  0.040 / 0.050
G11     71.3           41.4                6.9 +/-    0.49       9.7 +/-    0.49  0.050 / 0.050
G13     294.7          35.7                8.4 +/-    1.10      13.2 +/-    1.10  0.040 / 0.050
G15     314.5          10.7               -0.8 +/-   20.60      -2.2 +/-   20.60  0.090 / 0.100
G17     215.4          52.1                8.8 +/-    1.59      10.8 +/-    1.59  0.070 / 0.100
G19     214.9          27.8                7.5 +/-    1.36      13.9 +/-    1.36  0.030 / 0.050
G28     351.6          61.6                5.3 +/-    0.73       5.9 +/-    0.73  0.030 / 0.060
G30     111.2          71.7                8.2 +/-    0.96       8.6 +/-    0.96  0.040 / 0.090