PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/18-05:12:50
G02     54.6           36.1                3.3 +/-    1.63       5.1 +/-    1.63  0.230 / 0.350
G05     69.0           65.3                4.3 +/-    0.72       4.7 +/-    0.72  0.210 / 0.350
G12     188.0          42.3                6.1 +/-    0.76       8.6 +/-    0.76  0.160 / 0.480
G13     132.5          10.5                1.1 +/-   16.70       3.0 +/-   16.70  0.170 / 0.420
G21     267.3          15.8                3.5 +/-    2.14       8.5 +/-    2.14  0.050 / 0.060
G25     244.3          56.1                5.8 +/-    1.20       6.9 +/-    1.20  0.050 / 0.070
G29     328.8          53.6                3.3 +/-    0.65       4.0 +/-    0.65  0.030 / 0.020