PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/04-08:12:40
G02     57.3           34.0                1.6 +/-    1.07       2.6 +/-    1.07  0.040 / 0.040
G05     63.0           63.6                2.9 +/-    0.45       3.2 +/-    0.45  0.030 / 0.040
G12     186.7          37.9                4.3 +/-    1.43       6.4 +/-    1.43  0.090 / 0.100
G13     130.0          12.9                4.5 +/-    2.31      11.7 +/-    2.31  0.120 / 0.090
G15     165.4          10.0               -9.3 +/-   10.63     -26.0 +/-   10.63  0.150 / 0.250
G21     271.0          20.1                2.7 +/-    2.03       5.9 +/-    2.03  0.150 / 0.300
G25     235.2          53.7                3.0 +/-    1.50       3.7 +/-    1.50  0.070 / 0.450
G29     329.6          54.9                3.0 +/-    1.11       3.6 +/-    1.11  0.100 / 0.410