PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-21:58:10
G01     49.1           24.8               11.6 +/-    0.73      22.7 +/-    0.73  0.110 / 0.340
G06     177.3          26.6               19.0 +/-    2.53      35.7 +/-    2.53  0.100 / 0.390
G07     146.8          11.7               16.6 +/-    2.68      44.6 +/-    2.68  0.060 / 0.140
G11     44.8           15.3                9.8 +/-    2.01      24.2 +/-    2.01  0.060 / 0.140
G13     249.5          29.6               17.3 +/-    1.10      30.5 +/-    1.10  0.070 / 0.240
G15     282.4          15.5               13.8 +/-    2.03      33.8 +/-    2.03  0.070 / 0.290
G17     298.8          77.1               15.9 +/-    0.69      16.3 +/-    0.69  0.120 / 0.550
G19     248.4          60.1               16.4 +/-    0.59      18.6 +/-    0.59  0.110 / 0.550
G28     55.0           52.1               12.6 +/-    0.52      15.5 +/-    0.52  0.040 / 0.070
G30     149.9          38.5               16.0 +/-    1.21      23.9 +/-    1.21  0.040 / 0.060