PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-20:27:50
G01     61.8           31.2               14.8 +/-    0.57      25.4 +/-    0.57  0.070 / 0.250
G07     141.6          24.2               18.5 +/-    1.62      36.9 +/-    1.62  0.080 / 0.270
G11     49.5           25.9               13.4 +/-    0.89      25.6 +/-    0.89  0.040 / 0.050
G13     264.7          35.7               15.5 +/-    1.21      24.2 +/-    1.21  0.040 / 0.050
G15     295.6          16.2               11.3 +/-    1.86      27.3 +/-    1.86  0.060 / 0.100
G17     248.1          71.8               17.0 +/-    0.58      17.8 +/-    0.58  0.070 / 0.070
G18     43.6           14.2               10.9 +/-    0.94      27.6 +/-    0.94  0.080 / 0.210
G19     230.9          48.0               16.7 +/-    1.36      21.6 +/-    1.36  0.080 / 0.180
G28     33.7           57.0               14.2 +/-    0.65      16.5 +/-    0.65  0.040 / 0.050
G30     142.3          52.8               17.4 +/-    1.19      21.3 +/-    1.19  0.030 / 0.050