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                4.7 +/-    0.61       7.8 +/-    0.61  0.140 / 0.260
G07     132.3          36.1                5.3 +/-    1.03       8.3 +/-    1.03  0.080 / 0.200
G11     59.3           34.0                3.7 +/-    0.68       6.0 +/-    0.68  0.050 / 0.070
G13     286.8          36.6                3.9 +/-    2.31       6.1 +/-    2.31  0.050 / 0.070
G15     310.0          12.8                2.9 +/-    1.13       7.5 +/-    1.13  0.040 / 0.050
G17     222.4          64.3                6.4 +/-    0.64       7.1 +/-    0.64  0.040 / 0.050
G19     218.9          36.6                4.8 +/-    0.78       7.4 +/-    0.78  0.070 / 0.100
G28     6.2            60.6                4.7 +/-    0.59       5.3 +/-    0.59  0.060 / 0.080
G30     123.1          70.3                5.6 +/-    0.88       5.9 +/-    0.88  0.030 / 0.040