PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-09:43:00
G01     74.0           33.1                6.3 +/-    0.62      10.3 +/-    0.62  0.040 / 0.060
G07     135.7          32.0                8.0 +/-    0.89      13.5 +/-    0.89  0.030 / 0.050
G11     55.4           31.3                4.4 +/-    0.94       7.5 +/-    0.94  0.050 / 0.100
G13     280.2          37.0                6.9 +/-    0.69      10.6 +/-    0.69  0.040 / 0.100
G15     305.4          14.6                3.1 +/-    2.13       7.8 +/-    2.13  0.100 / 0.310
G17     229.7          68.8                5.2 +/-    0.59       5.5 +/-    0.59  0.110 / 0.330
G19     222.3          41.2                7.5 +/-    1.57      10.8 +/-    1.57  0.040 / 0.040
G28     15.7           59.6                3.7 +/-    0.49       4.3 +/-    0.49  0.030 / 0.040
G30     131.4          64.9                6.8 +/-    0.92       7.4 +/-    0.92  0.040 / 0.060