PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/26-14:42:50
G01     73.4           33.2                7.6 +/-    0.66      12.6 +/-    0.66  0.040 / 0.030
G07     136.1          33.1                9.2 +/-    1.27      15.2 +/-    1.27  0.030 / 0.030
G11     54.8           31.6                6.3 +/-    0.77      10.7 +/-    0.77  0.050 / 0.080
G13     277.1          37.9                8.9 +/-    1.04      13.5 +/-    1.04  0.040 / 0.070
G15     306.9          13.3                4.7 +/-    1.45      12.3 +/-    1.45  0.050 / 0.050
G17     229.6          67.5                7.8 +/-    0.82       8.4 +/-    0.82  0.040 / 0.050
G18     50.5           19.0                5.4 +/-    1.15      12.1 +/-    1.15  0.070 / 0.130
G19     222.4          36.9               10.7 +/-    0.76      16.4 +/-    0.76  0.070 / 0.130
G28     15.3           59.8                6.9 +/-    0.45       7.8 +/-    0.45  0.070 / 0.090
G30     132.9          65.2                8.6 +/-    0.43       9.4 +/-    0.43  0.050 / 0.110