PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-04:27:50
G08     268.2          18.5                9.1 +/-    2.09      20.7 +/-    2.09  0.270 / 0.220
G10     59.5           58.7                5.7 +/-    0.94       6.5 +/-    0.94  0.190 / 0.220
G14     261.8          63.5                8.2 +/-    0.88       9.0 +/-    0.88  0.100 / 0.200
G18     313.0          30.8                7.1 +/-    0.99      12.3 +/-    0.99  0.180 / 0.260
G20     84.2           51.4                8.1 +/-    1.34      10.0 +/-    1.34  0.080 / 0.330
G21     154.8          17.1                5.4 +/-    1.59      12.8 +/-    1.59  0.070 / 0.260
G24     39.6           9.7                 4.5 +/-    2.04      12.7 +/-    2.04  0.040 / 0.040
G27     232.6          16.5                8.1 +/-    2.36      19.5 +/-    2.36  0.040 / 0.050
G31     176.8          31.2                7.2 +/-    1.45      12.3 +/-    1.45  0.080 / 0.190
G32     343.0          74.2                6.0 +/-    0.31       6.2 +/-    0.31  0.140 / 0.220