PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-20:27:50
G01     105.7          26.3               17.3 +/-    1.10      32.9 +/-    1.10  0.080 / 0.170
G07     108.7          57.7               16.1 +/-    0.58      18.6 +/-    0.58  0.080 / 0.180
G08     42.3           22.7               10.5 +/-    1.26      21.7 +/-    1.26  0.090 / 0.190
G09     175.0          12.9               22.7 +/-    1.86      59.3 +/-    1.86  0.080 / 0.210
G11     89.2           43.3               16.0 +/-    0.86      22.1 +/-    0.86  0.040 / 0.070
G13     308.7          29.2               13.3 +/-    1.12      23.7 +/-    1.12  0.030 / 0.080
G18     79.4           24.6               14.9 +/-    1.46      29.3 +/-    1.46  0.040 / 0.060
G19     209.6          13.6               23.1 +/-    1.89      59.4 +/-    1.89  0.040 / 0.060
G28     321.6          61.3               14.6 +/-    0.80      16.4 +/-    0.80  0.030 / 0.040
G30     40.7           78.7               14.3 +/-    0.54      14.6 +/-    0.54  0.030 / 0.120