PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-10:12:50
G01     58.4           29.8                4.4 +/-    0.66       7.8 +/-    0.66  0.040 / 0.070
G06     181.3          14.8                7.7 +/-    2.79      19.3 +/-    2.79  0.040 / 0.060
G07     142.8          19.4                5.7 +/-    1.08      12.7 +/-    1.08  0.080 / 0.180
G11     47.3           21.2                2.1 +/-    1.61       4.5 +/-    1.61  0.070 / 0.250
G13     262.8          34.3                6.6 +/-    2.06      10.7 +/-    2.06  0.080 / 0.250
G15     292.8          16.5                4.3 +/-    1.67      10.2 +/-    1.67  0.080 / 0.220
G17     274.0          79.0                4.2 +/-    0.67       4.3 +/-    0.67  0.200 / 0.320
G19     235.1          54.0                6.3 +/-    0.81       7.6 +/-    0.81  0.180 / 0.380
G28     39.3           55.8                4.0 +/-    0.54       4.7 +/-    0.54  0.030 / 0.030
G30     144.4          51.1                8.0 +/-    0.42      10.0 +/-    0.42  0.030 / 0.030