PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-15:27:50
G01     58.5           30.0                9.4 +/-    2.19      16.5 +/-    2.19  0.040 / 0.050
G07     142.9          20.9               11.0 +/-    2.20      23.7 +/-    2.20  0.040 / 0.050
G11     47.3           21.9                7.3 +/-    2.48      15.3 +/-    2.48  0.100 / 0.180
G13     260.4          34.8               12.3 +/-    2.00      19.7 +/-    2.00  0.100 / 0.150
G15     294.9          15.3                7.0 +/-    3.07      17.3 +/-    3.07  0.110 / 0.090
G17     266.3          77.4               11.9 +/-    0.66      12.1 +/-    0.66  0.120 / 0.090
G18     41.2           11.6                8.1 +/-    1.26      21.7 +/-    1.26  0.070 / 0.120
G19     233.6          49.0               12.1 +/-    1.91      15.5 +/-    1.91  0.070 / 0.120
G28     38.1           56.2                9.4 +/-    1.04      11.1 +/-    1.04  0.230 / 0.380
G30     145.0          51.7               13.1 +/-    0.87      16.2 +/-    0.87  0.210 / 0.320