PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-03:12:40
G01     66.0           32.2                5.0 +/-    1.34       8.3 +/-    1.34  0.040 / 0.050
G07     139.7          27.3                6.8 +/-    0.58      12.6 +/-    0.58  0.050 / 0.040
G11     52.2           29.3                4.3 +/-    1.50       7.6 +/-    1.50  0.040 / 0.050
G13     270.4          36.5                4.9 +/-    1.29       7.5 +/-    1.29  0.060 / 0.060
G15     298.1          16.4                3.6 +/-    2.23       8.7 +/-    2.23  0.030 / 0.030
G17     242.1          71.9                6.3 +/-    0.38       6.6 +/-    0.38  0.030 / 0.030
G19     227.8          46.6                6.7 +/-    2.18       8.8 +/-    2.18  0.110 / 0.250
G28     28.0           57.9                5.5 +/-    2.18       6.3 +/-    2.18  0.120 / 0.320
G30     138.8          53.9                7.4 +/-    0.72       9.0 +/-    0.72  0.060 / 0.090