PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-14:57:50
G01     106.9          25.6                9.2 +/-    0.95      17.7 +/-    0.95  0.030 / 0.030
G07     107.1          58.3               11.5 +/-    0.41      13.2 +/-    0.41  0.030 / 0.030
G08     41.9           20.1                7.8 +/-    0.73      17.2 +/-    0.73  0.070 / 0.140
G09     174.0          12.4                9.6 +/-    2.32      25.5 +/-    2.32  0.070 / 0.120
G11     88.3           42.7                9.9 +/-    0.54      13.8 +/-    0.54  0.030 / 0.080
G13     309.4          28.9                8.8 +/-    1.62      15.8 +/-    1.62  0.040 / 0.070
G17     206.0          37.5               11.0 +/-    2.06      16.6 +/-    2.06  0.030 / 0.030
G18     80.0           24.3                9.0 +/-    0.90      18.0 +/-    0.90  0.030 / 0.040
G28     318.1          61.0                9.1 +/-    0.59      10.2 +/-    0.59  0.040 / 0.060
G30     21.4           78.1                9.9 +/-    1.00      10.1 +/-    1.00  0.050 / 0.070