PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-14:28:00
G01     59.5           30.1                6.0 +/-    1.55      10.6 +/-    1.55  0.110 / 0.240
G06     180.2          15.4               12.7 +/-    2.36      31.4 +/-    2.36  0.100 / 0.210
G07     142.1          19.1                8.0 +/-    1.21      18.1 +/-    1.21  0.030 / 0.030
G11     47.3           20.9                5.5 +/-    3.17      11.9 +/-    3.17  0.030 / 0.030
G13     264.5          34.7                9.6 +/-    1.81      15.3 +/-    1.81  0.100 / 0.210
G15     295.9          15.7                5.0 +/-    0.80      12.3 +/-    0.80  0.090 / 0.230
G17     269.8          78.9                7.5 +/-    0.57       7.7 +/-    0.57  0.060 / 0.120
G19     233.8          53.3                8.8 +/-    2.06      10.6 +/-    2.06  0.070 / 0.120
G28     36.9           56.3                8.8 +/-    0.95      10.4 +/-    0.95  0.040 / 0.060
G30     143.7          54.0                7.0 +/-    0.72       8.4 +/-    0.72  0.050 / 0.090