PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-01:58:10
G02     29.3           58.3                7.5 +/-    1.17       8.7 +/-    1.17  0.160 / 0.210
G05     144.2          58.3                8.3 +/-    1.10       9.5 +/-    1.10  0.140 / 0.220
G06     49.9           22.3                5.3 +/-    2.80      11.0 +/-    2.80  0.050 / 0.100
G12     216.7          74.6                6.3 +/-    0.61       6.5 +/-    0.61  0.040 / 0.060
G19     95.9           12.3                7.3 +/-    2.14      19.3 +/-    2.14  0.020 / 0.040
G25     302.5          50.9                6.8 +/-    4.25       8.5 +/-    4.25  0.020 / 0.020
G29     305.8          28.3                5.9 +/-    1.96      10.6 +/-    1.96  0.020 / 0.030