PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-19:58:00
G01     100.4          28.7               15.4 +/-    1.25      27.7 +/-    1.25  0.070 / 0.150
G07     115.7          53.7               15.0 +/-    0.46      18.1 +/-    0.46  0.080 / 0.180
G08     42.0           17.9               10.6 +/-    0.50      24.6 +/-    0.50  0.040 / 0.050
G11     81.8           43.0               15.4 +/-    0.46      21.3 +/-    0.46  0.040 / 0.080
G13     304.3          32.1               13.5 +/-    1.21      22.7 +/-    1.21  0.060 / 0.130
G17     209.9          40.3               16.9 +/-    1.29      24.4 +/-    1.29  0.060 / 0.160
G18     73.8           24.9               14.0 +/-    1.40      27.5 +/-    1.40  0.020 / 0.080
G19     211.2          17.9                7.4 +/-   19.81      17.1 +/-   19.81  0.030 / 0.050
G28     331.7          61.8               13.3 +/-    0.82      14.9 +/-    0.82  0.050 / 0.110
G30     67.0           79.0               13.3 +/-    0.76      13.6 +/-    0.76  0.050 / 0.090