PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-20:58:00
G01     50.4           25.8               10.5 +/-    2.19      20.2 +/-    2.19  0.070 / 0.180
G06     177.4          25.2               15.0 +/-    1.22      29.2 +/-    1.22  0.080 / 0.230
G07     146.3          13.3               13.7 +/-    1.81      35.5 +/-    1.81  0.150 / 0.260
G11     45.1           16.4                9.3 +/-    2.07      22.4 +/-    2.07  0.080 / 0.170
G13     251.2          30.6               13.9 +/-    1.90      24.1 +/-    1.90  0.030 / 0.030
G15     284.3          15.7               11.2 +/-    0.93      27.3 +/-    0.93  0.030 / 0.020
G17     294.0          77.4               12.4 +/-    0.41      12.7 +/-    0.41  0.100 / 0.150
G19     245.5          58.4               13.7 +/-    0.99      15.8 +/-    0.99  0.100 / 0.140
G28     52.3           52.9               11.5 +/-    1.09      14.0 +/-    1.09  0.040 / 0.050
G30     149.3          40.7               12.6 +/-    0.59      18.2 +/-    0.59  0.030 / 0.060