PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-11:27:50
G01     112.4          22.3                5.2 +/-    0.91      10.9 +/-    0.91  0.030 / 0.030
G07     98.8           59.9                5.1 +/-    0.49       5.8 +/-    0.49  0.040 / 0.030
G08     42.5           23.5                2.2 +/-    0.64       4.4 +/-    0.64  0.030 / 0.040
G09     174.3          17.0                5.3 +/-    0.76      12.5 +/-    0.76  0.030 / 0.040
G11     94.8           40.5                4.7 +/-    1.01       6.8 +/-    1.01  0.060 / 0.180
G17     203.0          34.4                8.3 +/-    1.11      13.3 +/-    1.11  0.080 / 0.170
G28     307.2          59.7                4.3 +/-    1.19       4.9 +/-    1.19  0.090 / 0.080
G30     357.9          73.1                3.9 +/-    0.65       4.1 +/-    0.65  0.060 / 0.080