PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-08:27:50
G01     115.9          20.1                7.5 +/-    1.13      16.4 +/-    1.13  0.060 / 0.060
G07     90.6           63.2                5.5 +/-    0.87       6.1 +/-    0.87  0.050 / 0.060
G08     43.5           27.1                3.0 +/-    1.64       5.6 +/-    1.64  0.100 / 0.100
G09     175.9          21.9                6.9 +/-    1.08      14.4 +/-    1.08  0.080 / 0.110
G11     101.0          40.1                6.3 +/-    0.65       9.2 +/-    0.65  0.060 / 0.120
G13     316.9          20.4                1.0 +/-    2.45       2.2 +/-    2.45  0.060 / 0.130
G17     202.0          30.1                6.7 +/-    1.83      11.7 +/-    1.83  0.030 / 0.040
G28     300.3          58.8                3.5 +/-    0.72       4.0 +/-    0.72  0.030 / 0.040
G30     352.6          70.9                3.8 +/-    0.84       4.0 +/-    0.84  0.100 / 0.190