PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/07-13:58:00
G01     71.2           33.0                7.0 +/-    1.10      11.6 +/-    1.10  0.030 / 0.030
G07     137.2          31.2                8.5 +/-    1.09      14.5 +/-    1.09  0.030 / 0.030
G11     53.3           30.1                7.4 +/-    1.88      12.9 +/-    1.88  0.050 / 0.090
G13     274.6          37.7                8.2 +/-    2.41      12.4 +/-    2.41  0.070 / 0.080
G15     305.6          13.5                4.3 +/-    1.30      11.0 +/-    1.30  0.090 / 0.110
G17     233.1          69.8               10.0 +/-    0.36      10.6 +/-    0.36  0.050 / 0.090
G18     48.9           18.0                8.0 +/-    2.57      18.4 +/-    2.57  0.090 / 0.080
G19     223.7          38.3                9.7 +/-    2.32      14.6 +/-    2.32  0.050 / 0.090
G28     18.6           59.4                8.6 +/-    1.32       9.8 +/-    1.32  0.090 / 0.220
G30     135.2          63.7                9.0 +/-    0.59      10.0 +/-    0.59  0.100 / 0.210