PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-01:27:50
G01     55.5           28.6                2.9 +/-    0.84       5.3 +/-    0.84  0.030 / 0.050
G06     180.2          18.1                8.4 +/-    1.47      19.5 +/-    1.47  0.030 / 0.060
G07     144.3          18.3                6.9 +/-    1.71      15.8 +/-    1.71  0.030 / 0.030
G11     47.6           22.7                2.8 +/-    0.59       5.7 +/-    0.59  0.030 / 0.030
G13     257.9          33.3                5.3 +/-    1.58       8.6 +/-    1.58  0.090 / 0.270
G15     288.7          16.7                4.8 +/-    1.38      11.5 +/-    1.38  0.120 / 0.310
G17     273.5          77.0                6.2 +/-    1.05       6.3 +/-    1.05  0.060 / 0.100
G19     238.4          55.1                6.4 +/-    1.89       7.7 +/-    1.89  0.060 / 0.090
G28     44.2           54.8                4.9 +/-    0.78       5.9 +/-    0.78  0.080 / 0.250
G30     145.7          43.6                8.2 +/-    1.19      11.3 +/-    1.19  0.090 / 0.220