PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-15:57:50
G01     77.7           32.7               10.3 +/-    0.50      17.1 +/-    0.50  0.040 / 0.100
G07     133.2          32.3               12.4 +/-    0.86      20.8 +/-    0.86  0.060 / 0.110
G11     58.0           35.1                8.6 +/-    0.68      13.6 +/-    0.68  0.030 / 0.060
G13     281.8          38.7               10.4 +/-    1.09      15.5 +/-    1.09  0.050 / 0.070
G15     307.6          13.9                7.9 +/-    2.05      20.1 +/-    2.05  0.050 / 0.130
G17     222.3          61.2               12.9 +/-    0.71      14.5 +/-    0.71  0.050 / 0.140
G18     53.3           20.4                7.7 +/-    1.41      16.7 +/-    1.41  0.070 / 0.130
G19     218.9          37.1               13.4 +/-    1.54      20.5 +/-    1.54  0.070 / 0.110
G28     355.8          61.5               10.8 +/-    0.85      12.1 +/-    0.85  0.030 / 0.050
G30     128.0          65.2               10.4 +/-    0.56      11.4 +/-    0.56  0.030 / 0.050