PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-14:13:00
G01     81.2           33.1                5.6 +/-    0.68       9.1 +/-    0.68  0.030 / 0.020
G07     131.8          38.8                8.4 +/-    0.77      12.5 +/-    0.77  0.040 / 0.020
G11     60.0           35.5                7.4 +/-    1.00      11.6 +/-    1.00  0.050 / 0.050
G13     285.2          37.8               10.0 +/-    1.08      15.1 +/-    1.08  0.050 / 0.050
G15     312.1          11.2                0.3 +/-   16.08       0.7 +/-   16.08  0.080 / 0.090
G17     221.2          61.6                9.5 +/-    1.27      10.7 +/-    1.27  0.090 / 0.090
G18     56.1           21.6                6.3 +/-    4.01      13.3 +/-    4.01  0.090 / 0.080
G19     218.6          30.9                7.5 +/-    3.02      13.0 +/-    3.02  0.040 / 0.090
G28     3.4            61.0                7.0 +/-    1.01       7.9 +/-    1.01  0.140 / 0.230
G30     122.7          71.2                8.2 +/-    0.94       8.7 +/-    0.94  0.190 / 0.250