PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-15:27:50
G01     73.4           33.2               13.7 +/-    0.78      22.6 +/-    0.78  0.040 / 0.040
G07     136.1          33.1               14.6 +/-    1.36      23.9 +/-    1.36  0.030 / 0.030
G11     55.0           31.8               12.4 +/-    0.90      21.0 +/-    0.90  0.060 / 0.080
G13     277.1          37.9               14.9 +/-    1.52      22.4 +/-    1.52  0.040 / 0.070
G15     306.6          13.5               11.0 +/-    1.60      28.3 +/-    1.60  0.060 / 0.130
G17     229.6          66.9               15.2 +/-    0.83      16.4 +/-    0.83  0.070 / 0.120
G18     50.6           19.1               11.6 +/-    0.90      26.1 +/-    0.90  0.070 / 0.090
G19     222.5          37.1               15.6 +/-    0.85      23.8 +/-    0.85  0.050 / 0.090
G28     15.4           59.8               13.9 +/-    0.63      15.8 +/-    0.63  0.040 / 0.050
G30     132.9          64.9               15.3 +/-    0.58      16.7 +/-    0.58  0.040 / 0.060