PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/07-11:27:50
G01     52.1           26.5                3.2 +/-    1.66       6.0 +/-    1.66  0.030 / 0.030
G06     177.3          21.7                3.8 +/-    4.12       8.0 +/-    4.12  0.030 / 0.030
G07     144.4          14.1                3.3 +/-    2.10       8.5 +/-    2.10  0.220 / 0.440
G11     45.8           19.7                2.7 +/-    1.87       6.0 +/-    1.87  0.200 / 0.340
G13     253.1          33.2                4.2 +/-    1.79       7.0 +/-    1.79  0.170 / 0.240
G15     288.4          15.6                2.5 +/-    1.04       6.2 +/-    1.04  0.160 / 0.230
G17     279.6          77.7                4.9 +/-    0.51       5.0 +/-    0.51  0.040 / 0.050
G19     240.7          58.8                3.8 +/-    2.30       4.4 +/-    2.30  0.040 / 0.050
G28     35.6           58.2                4.2 +/-    1.78       4.9 +/-    1.78  0.060 / 0.050
G30     148.3          46.6                6.0 +/-    0.61       7.9 +/-    0.61  0.060 / 0.050