PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-21:58:00
G01     63.9           31.7               11.5 +/-    1.13      19.5 +/-    1.13  0.150 / 0.130
G07     140.7          26.0               15.6 +/-    0.96      29.8 +/-    0.96  0.170 / 0.150
G11     50.9           27.9                9.6 +/-    2.66      17.5 +/-    2.66  0.060 / 0.050
G13     267.3          36.2               14.1 +/-    1.59      21.9 +/-    1.59  0.080 / 0.040
G15     297.0          16.3               11.7 +/-    1.08      28.3 +/-    1.08  0.070 / 0.050
G17     242.5          69.2               13.3 +/-    0.43      14.1 +/-    0.43  0.060 / 0.040
G18     45.0           15.4               10.2 +/-    2.16      25.1 +/-    2.16  0.100 / 0.370
G19     229.2          46.8               14.5 +/-    2.81      19.0 +/-    2.81  0.160 / 0.320
G28     30.7           57.5               13.9 +/-    0.95      16.2 +/-    0.95  0.040 / 0.010
G30     140.7          53.8               14.3 +/-    0.45      17.3 +/-    0.45  0.040 / 0.020