PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-21:27:40
G02     63.5           30.2                8.1 +/-    1.31      14.2 +/-    1.31  0.030 / 0.040
G05     51.5           55.8                7.9 +/-    0.65       9.3 +/-    0.65  0.030 / 0.050
G12     181.1          23.6               12.2 +/-    4.52      24.7 +/-    4.52  0.060 / 0.170
G13     123.0          19.3               12.5 +/-    1.92      27.9 +/-    1.92  0.060 / 0.160
G15     162.7          15.7               16.1 +/-    3.80      39.4 +/-    3.80  0.050 / 0.080
G21     275.8          20.1               10.0 +/-    1.51      22.0 +/-    1.51  0.040 / 0.070
G25     227.9          47.2               11.4 +/-    0.80      14.9 +/-    0.80  0.070 / 0.150
G29     331.2          59.2                7.9 +/-    1.40       9.0 +/-    1.40  0.060 / 0.120