PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-19:57:40
G01     80.4           33.2               11.2 +/-    0.64      18.4 +/-    0.64  0.110 / 0.170
G07     132.3          38.7               13.7 +/-    1.07      20.3 +/-    1.07  0.080 / 0.170
G11     61.1           36.6               10.0 +/-    0.36      15.4 +/-    0.36  0.040 / 0.070
G13     284.9          37.5               12.4 +/-    0.92      18.8 +/-    0.92  0.030 / 0.080
G15     309.5          13.0                8.6 +/-    1.07      22.4 +/-    1.07  0.070 / 0.100
G17     222.2          57.8               14.4 +/-    1.39      16.7 +/-    1.39  0.070 / 0.110
G18     56.2           21.9                7.6 +/-    0.93      16.1 +/-    0.93  0.050 / 0.060
G19     219.0          33.4               16.3 +/-    1.06      26.7 +/-    1.06  0.040 / 0.060
G28     5.6            60.8               10.7 +/-    0.57      12.0 +/-    0.57  0.050 / 0.120
G30     124.9          68.1               12.2 +/-    0.75      13.1 +/-    0.75  0.050 / 0.110