PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-08:27:50
G01     112.6          22.3                6.5 +/-    1.04      13.5 +/-    1.04  0.040 / 0.060
G07     97.8           60.9                6.2 +/-    0.61       7.0 +/-    0.61  0.040 / 0.060
G08     42.6           24.0                1.8 +/-    0.99       3.6 +/-    0.99  0.030 / 0.040
G09     175.4          18.4                5.1 +/-    1.72      11.7 +/-    1.72  0.030 / 0.040
G11     96.1           41.0                7.1 +/-    0.55      10.2 +/-    0.55  0.080 / 0.300
G13     314.8          23.1                0.9 +/-    1.78       1.7 +/-    1.78  0.100 / 0.230
G17     203.2          33.9                7.3 +/-    1.64      11.9 +/-    1.64  0.070 / 0.100
G28     307.4          59.8                4.8 +/-    0.97       5.5 +/-    0.97  0.070 / 0.110
G30     1.5            73.8                4.4 +/-    0.76       4.6 +/-    0.76  0.070 / 0.090