PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-14:12:50
G01     105.0          26.6               10.1 +/-    1.13      19.0 +/-    1.13  0.030 / 0.020
G07     110.0          56.7               10.9 +/-    0.41      12.7 +/-    0.41  0.030 / 0.020
G08     41.7           18.0                8.1 +/-    1.93      18.6 +/-    1.93  0.040 / 0.040
G09     173.4          10.5                9.3 +/-    4.45      25.5 +/-    4.45  0.030 / 0.040
G11     85.3           42.6               10.1 +/-    1.18      14.0 +/-    1.18  0.080 / 0.140
G13     307.8          30.0                9.7 +/-    1.18      17.0 +/-    1.18  0.080 / 0.150
G17     206.6          40.0               11.4 +/-    1.06      16.6 +/-    1.06  0.080 / 0.110
G18     77.8           24.4               10.3 +/-    1.59      20.4 +/-    1.59  0.080 / 0.130
G28     321.7          61.3                7.6 +/-    0.91       8.5 +/-    0.91  0.070 / 0.130
G30     28.5           78.9                9.4 +/-    0.82       9.6 +/-    0.82  0.070 / 0.130