PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-12:58:10
G01     83.2           32.8                6.0 +/-    1.33      10.0 +/-    1.33  0.340 / 0.210
G07     130.4          37.8                8.0 +/-    0.80      12.0 +/-    0.80  0.180 / 0.260
G11     61.3           34.9                6.7 +/-    0.88      10.7 +/-    0.88  0.060 / 0.060
G13     290.2          36.1                8.0 +/-    0.90      12.5 +/-    0.90  0.040 / 0.060
G15     312.9          11.2               -0.6 +/-   13.11      -1.5 +/-   13.11  0.270 / 0.140
G17     219.3          62.0                6.6 +/-    1.36       7.4 +/-    1.36  0.080 / 0.100
G19     217.4          34.2                9.2 +/-    2.13      14.8 +/-    2.13  0.030 / 0.030
G28     0.8            61.0                6.0 +/-    0.81       6.8 +/-    0.81  0.030 / 0.030
G30     116.4          73.4                7.2 +/-    0.57       7.4 +/-    0.57  0.200 / 0.160