PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-07:28:10
G01     221.3          13.3                4.8 +/-    1.52      12.5 +/-    1.52  0.130 / 0.390
G03     270.8          70.6                3.0 +/-    0.63       3.2 +/-    0.63  0.140 / 0.720
G14     90.3           21.6                2.7 +/-    0.97       5.7 +/-    0.97  0.120 / 0.230
G16     141.1          49.4                5.4 +/-    0.66       6.8 +/-    0.66  0.100 / 0.240
G22     207.4          65.9                4.7 +/-    0.53       5.1 +/-    0.53  0.040 / 0.040
G26     87.8           54.4                4.6 +/-    0.73       5.6 +/-    0.73  0.040 / 0.040
G31     47.9           26.4                2.9 +/-    2.16       5.5 +/-    2.16  0.040 / 0.040