PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-07:27:40
G02     54.5           36.3                3.4 +/-    1.36       5.3 +/-    1.36  0.050 / 0.060
G05     70.0           65.9                3.7 +/-    0.63       4.1 +/-    0.63  0.050 / 0.070
G12     187.7          42.0                5.3 +/-    0.78       7.4 +/-    0.78  0.030 / 0.020
G13     132.7          10.5               -0.5 +/-   16.32      -1.3 +/-   16.32  0.030 / 0.030
G21     267.9          17.3                3.4 +/-    3.40       7.9 +/-    3.40  0.130 / 0.230
G25     242.0          56.1                4.3 +/-    1.90       5.1 +/-    1.90  0.150 / 0.240
G29     327.3          52.0                4.2 +/-    0.83       5.2 +/-    0.83  0.040 / 0.040