PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-19:58:00
G01     103.2          26.9               12.1 +/-    1.03      22.6 +/-    1.03  0.030 / 0.040
G07     114.5          49.7               13.3 +/-    0.39      16.8 +/-    0.39  0.030 / 0.050
G08     41.5           16.6                8.9 +/-    2.14      21.4 +/-    2.14  0.080 / 0.120
G09     174.8          11.8               15.8 +/-    3.06      42.2 +/-    3.06  0.070 / 0.130
G11     82.3           42.7               13.0 +/-    0.67      18.1 +/-    0.67  0.240 / 0.380
G13     306.4          31.4               10.4 +/-    0.89      17.7 +/-    0.89  0.190 / 0.410
G17     206.3          42.1               14.7 +/-    0.91      20.6 +/-    0.91  0.070 / 0.170
G18     74.1           23.9               10.8 +/-    1.77      21.7 +/-    1.77  0.070 / 0.130
G28     315.8          60.1               11.7 +/-    0.92      13.3 +/-    0.92  0.090 / 0.130
G30     48.6           79.4               11.4 +/-    0.53      11.6 +/-    0.53  0.090 / 0.240