PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-21:43:00
G01     49.0           24.7               11.2 +/-    0.84      22.1 +/-    0.84  0.140 / 0.370
G06     177.2          26.9               18.4 +/-    1.69      34.4 +/-    1.69  0.090 / 0.350
G07     146.8          11.6               19.2 +/-    4.52      51.6 +/-    4.52  0.120 / 0.520
G11     44.7           15.1               10.2 +/-    2.18      25.2 +/-    2.18  0.150 / 0.500
G13     249.3          29.5               15.2 +/-    1.14      26.8 +/-    1.14  0.050 / 0.080
G15     282.3          15.5               12.6 +/-    2.35      31.0 +/-    2.35  0.070 / 0.090
G17     300.6          77.2               14.7 +/-    0.72      15.1 +/-    0.72  0.060 / 0.110
G19     248.6          60.1               16.4 +/-    0.60      18.6 +/-    0.60  0.050 / 0.110
G28     55.2           52.1               12.4 +/-    0.43      15.2 +/-    0.43  0.140 / 0.320
G30     150.0          38.4               15.7 +/-    1.00      23.4 +/-    1.00  0.120 / 0.310