PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/25-09:27:50
G01     73.2           33.0                3.2 +/-    1.02       5.2 +/-    1.02  0.040 / 0.060
G07     136.1          31.5                5.9 +/-    0.75      10.0 +/-    0.75  0.050 / 0.110
G11     55.0           31.0                2.4 +/-    0.59       4.2 +/-    0.59  0.030 / 0.050
G13     279.3          37.0                6.7 +/-    0.77      10.2 +/-    0.77  0.040 / 0.050
G15     304.8          14.8                3.3 +/-    2.50       8.3 +/-    2.50  0.030 / 0.050
G17     230.8          69.4                5.1 +/-    0.54       5.4 +/-    0.54  0.040 / 0.050
G19     222.7          41.8                6.2 +/-    1.28       8.8 +/-    1.28  0.110 / 0.330
G28     16.9           59.5                2.6 +/-    0.32       3.0 +/-    0.32  0.110 / 0.360
G30     132.2          64.2                4.4 +/-    0.74       4.8 +/-    0.74  0.040 / 0.070