PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-12:12:50
G01     261.0          39.8                6.7 +/-    3.57       9.8 +/-    3.57  0.060 / 0.090
G03     317.1          40.9                4.6 +/-    0.71       6.6 +/-    0.71  0.060 / 0.080
G10     133.1          10.4                5.8 +/-    1.72      16.0 +/-    1.72  0.050 / 0.080
G11     243.6          16.1                4.7 +/-    1.09      11.4 +/-    1.09  0.060 / 0.080
G14     51.3           45.5                4.6 +/-    1.03       6.1 +/-    1.03  0.050 / 0.080
G18     225.2          33.6                5.7 +/-    0.97       9.3 +/-    0.97  0.120 / 0.070
G22     311.2          63.2                4.3 +/-    1.55       4.8 +/-    1.55  0.320 / 0.320
G25     46.2           13.6                5.0 +/-    3.01      12.8 +/-    3.01  0.180 / 0.270
G31     46.6           68.3                4.0 +/-    0.39       4.3 +/-    0.39  0.040 / 0.050
G32     66.8           32.6                1.4 +/-    3.52       2.3 +/-    3.52  0.040 / 0.040