PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-20:58:00
G01     96.9           30.0               14.2 +/-    1.21      24.8 +/-    1.21  0.150 / 0.310
G07     119.5          51.0               13.7 +/-    0.62      17.0 +/-    0.62  0.260 / 0.210
G08     42.1           16.0                9.5 +/-    1.65      23.0 +/-    1.65  0.070 / 0.040
G11     77.9           42.6               13.1 +/-    1.19      18.3 +/-    1.19  0.080 / 0.030
G13     301.3          33.5               10.1 +/-    2.38      16.5 +/-    2.38  0.030 / 0.010
G17     211.7          43.0               14.9 +/-    1.04      20.7 +/-    1.04  0.030 / 0.020
G18     70.5           24.8               11.7 +/-    1.05      22.9 +/-    1.05  0.100 / 0.150
G19     212.3          21.0               19.0 +/-    4.28      40.7 +/-    4.28  0.080 / 0.130
G28     338.3          61.9               11.4 +/-    0.26      12.8 +/-    0.26  0.030 / 0.010
G30     85.4           77.7               13.1 +/-    0.25      13.3 +/-    0.25  0.030 / 0.010