PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-13:43:10
G01     223.8          15.3                5.9 +/-    3.01      14.5 +/-    3.01  0.220 / 0.270
G03     266.2          72.7                8.6 +/-    1.19       9.0 +/-    1.19  0.170 / 0.340
G14     88.9           21.9                5.5 +/-    2.14      11.5 +/-    2.14  0.030 / 0.040
G16     149.0          45.2                8.7 +/-    1.07      11.6 +/-    1.07  0.040 / 0.040
G22     199.3          65.6                7.8 +/-    1.17       8.5 +/-    1.17  0.100 / 0.240
G23     309.3          39.3                6.8 +/-    1.44      10.0 +/-    1.44  0.140 / 0.250
G26     97.4           55.4                6.4 +/-    1.39       7.6 +/-    1.39  0.040 / 0.040
G31     46.2           30.7                5.4 +/-    2.56       9.3 +/-    2.56  0.030 / 0.040