PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-06:57:50
G01     101.5          28.1                7.5 +/-    1.08      13.7 +/-    1.08  0.040 / 0.050
G07     114.7          53.1                7.5 +/-    0.78       9.1 +/-    0.78  0.040 / 0.050
G08     41.7           15.0                2.5 +/-    2.09       6.1 +/-    2.09  0.030 / 0.040
G11     81.6           41.7                5.9 +/-    0.71       8.4 +/-    0.71  0.030 / 0.040
G13     306.3          30.4                4.8 +/-    1.61       8.3 +/-    1.61  0.090 / 0.190
G17     208.0          44.9                8.1 +/-    0.63      10.9 +/-    0.63  0.190 / 0.360
G19     210.5          19.1                5.6 +/-    1.80      12.5 +/-    1.80  0.040 / 0.060
G28     330.1          61.7                4.9 +/-    0.43       5.4 +/-    0.43  0.050 / 0.050
G30     54.9           79.3                6.8 +/-    0.57       6.9 +/-    0.57  0.080 / 0.110