PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-21:27:50
G01     82.7           33.1               13.7 +/-    1.50      22.5 +/-    1.50  0.350 / 0.160
G07     130.8          40.5               16.3 +/-    1.13      23.5 +/-    1.13  0.160 / 0.230
G11     63.6           38.1               12.4 +/-    0.93      18.7 +/-    0.93  0.060 / 0.040
G13     287.5          37.2               15.1 +/-    1.28      23.0 +/-    1.28  0.060 / 0.040
G15     310.6          12.7               10.9 +/-    1.41      28.8 +/-    1.41  0.030 / 0.010
G17     220.4          54.9               17.8 +/-    1.34      21.2 +/-    1.34  0.030 / 0.010
G18     58.1           22.5               11.0 +/-    1.35      22.7 +/-    1.35  0.040 / 0.020
G19     217.9          32.2               18.3 +/-    1.64      30.6 +/-    1.64  0.050 / 0.030
G28     2.2            61.0               13.3 +/-    0.46      14.9 +/-    0.46  0.150 / 0.220
G30     121.9          69.0               16.4 +/-    0.42      17.4 +/-    0.42  0.130 / 0.250