PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-18:43:10
G02     52.8           38.7                9.5 +/-    0.42      14.2 +/-    0.42  0.040 / 0.090
G05     70.3           66.6                9.6 +/-    0.36      10.3 +/-    0.36  0.090 / 0.090
G12     185.6          40.0               11.3 +/-    1.21      16.5 +/-    1.21  0.040 / 0.050
G13     131.5          10.8               -6.9 +/-   21.24     -18.8 +/-   21.24  0.060 / 0.060
G21     266.4          12.6                9.6 +/-   11.18      25.2 +/-   11.18  0.050 / 0.070
G25     248.7          55.7               10.2 +/-    0.69      12.1 +/-    0.69  0.050 / 0.080
G29     324.6          48.7               10.4 +/-    1.23      13.4 +/-    1.23  0.240 / 0.710