PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-21:58:10
G02     48.3           43.4              -64.9 +/-   34.13     -89.6 +/-   34.13  0.140 / 0.470
G05     90.7           70.6               10.2 +/-    0.79      10.7 +/-    0.79  0.040 / 0.060
G12     186.5          43.5               27.2 +/-    7.26      37.5 +/-    7.26  0.050 / 0.080
G20     201.9          49.3               -2.8 +/-    6.23      -3.6 +/-    6.23  0.040 / 0.040
G21     262.2          10.3               -6.6 +/-   11.28     -18.4 +/-   11.28  0.050 / 0.050
G25     246.9          58.1               -8.0 +/-    7.80      -9.2 +/-    7.80  0.030 / 0.040
G29     322.1          46.0                8.2 +/-    1.57      10.9 +/-    1.57  0.030 / 0.040