PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/30-09:57:50
G02     201.0          18.8                4.9 +/-    1.57      11.0 +/-    1.57  0.090 / 0.160
G06     170.4          54.0                5.2 +/-    1.68       6.3 +/-    1.68  0.140 / 0.180
G13     226.8          13.2                5.5 +/-    4.04      14.3 +/-    4.04  0.080 / 0.110
G17     24.9           58.0                3.6 +/-    0.41       4.2 +/-    0.41  0.090 / 0.130
G19     311.0          70.2                3.8 +/-    0.65       4.0 +/-    0.65  0.140 / 0.550
G24     307.9          32.6                2.3 +/-    2.52       3.8 +/-    2.52  0.280 / 0.520
G28     86.8           40.9                5.2 +/-    0.95       7.5 +/-    0.95  0.050 / 0.040
G30     157.7          16.1                2.5 +/-    2.11       6.1 +/-    2.11  0.040 / 0.050