PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-15:42:50
G01     99.0           29.2               11.5 +/-    1.19      20.5 +/-    1.19  0.190 / 0.420
G07     117.4          52.3               10.6 +/-    0.52      13.1 +/-    0.52  0.190 / 0.380
G08     41.8           14.1                8.4 +/-    3.00      21.5 +/-    3.00  0.030 / 0.020
G11     78.1           42.1               10.9 +/-    0.95      15.3 +/-    0.95  0.020 / 0.020
G13     302.7          33.0                8.0 +/-    2.45      13.3 +/-    2.45  0.030 / 0.030
G17     209.7          44.8               10.3 +/-    0.94      13.9 +/-    0.94  0.030 / 0.040
G18     71.9           24.7               11.7 +/-    1.46      23.1 +/-    1.46  0.040 / 0.060
G19     211.8          17.7               10.2 +/-    1.30      23.8 +/-    1.30  0.040 / 0.070
G28     333.5          61.8                8.4 +/-    0.45       9.4 +/-    0.45  0.110 / 0.260
G30     64.7           79.9               10.3 +/-    0.41      10.5 +/-    0.41  0.140 / 0.250