PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-14:42:40
G01     80.4           33.2                9.3 +/-    0.97      15.3 +/-    0.97  0.040 / 0.030
G07     132.2          38.3               10.9 +/-    0.65      16.4 +/-    0.65  0.030 / 0.030
G11     59.6           35.3               10.5 +/-    0.84      16.5 +/-    0.84  0.050 / 0.050
G13     284.5          37.8               12.6 +/-    0.92      19.0 +/-    0.92  0.040 / 0.060
G15     311.4          11.5                7.0 +/-    1.68      18.9 +/-    1.68  0.050 / 0.090
G17     221.9          61.9               11.5 +/-    1.40      12.9 +/-    1.40  0.040 / 0.070
G18     55.5           21.4               10.1 +/-    2.99      21.5 +/-    2.99  0.090 / 0.090
G19     218.9          31.7                9.2 +/-    2.77      15.6 +/-    2.77  0.070 / 0.090
G28     4.7            60.9               10.9 +/-    0.96      12.3 +/-    0.96  0.280 / 0.210
G30     124.0          70.5               11.0 +/-    0.72      11.6 +/-    0.72  0.130 / 0.170