PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-01:27:50
G01     74.2           33.2                7.6 +/-    0.77      12.5 +/-    0.77  0.030 / 0.050
G07     135.7          33.9                9.3 +/-    1.23      15.1 +/-    1.23  0.030 / 0.060
G11     57.8           34.8                5.6 +/-    0.82       8.9 +/-    0.82  0.040 / 0.060
G13     279.1          37.4                8.9 +/-    1.03      13.5 +/-    1.03  0.040 / 0.030
G15     304.4          15.1                4.2 +/-    1.60      10.3 +/-    1.60  0.060 / 0.130
G17     228.6          64.8               10.2 +/-    1.16      11.1 +/-    1.16  0.100 / 0.250
G19     222.2          39.7               10.9 +/-    1.26      16.0 +/-    1.26  0.080 / 0.140
G28     15.7           59.7                6.8 +/-    0.47       7.7 +/-    0.47  0.090 / 0.110
G30     132.2          60.0                8.3 +/-    1.08       9.4 +/-    1.08  0.050 / 0.110