PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-10:57:50
G01     80.0           33.1                1.8 +/-    1.36       2.9 +/-    1.36  0.090 / 0.090
G07     132.3          36.1                6.1 +/-    0.56       9.5 +/-    0.56  0.090 / 0.080
G11     59.3           34.0                4.9 +/-    1.06       7.9 +/-    1.06  0.070 / 0.060
G13     286.8          36.6                4.4 +/-    1.55       6.8 +/-    1.55  0.070 / 0.070
G15     310.0          12.8                2.4 +/-    1.76       6.3 +/-    1.76  0.040 / 0.030
G17     222.4          64.3                5.5 +/-    1.73       6.1 +/-    1.73  0.040 / 0.030
G19     218.9          36.6                5.4 +/-    2.07       8.3 +/-    2.07  0.140 / 0.220
G28     6.2            60.6                4.4 +/-    1.27       4.9 +/-    1.27  0.170 / 0.200
G30     123.1          70.3                5.2 +/-    0.65       5.5 +/-    0.65  0.040 / 0.040