PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/22-13:58:00
G02     52.3           38.5                7.5 +/-    0.85      11.2 +/-    0.85  0.020 / 0.020
G05     82.6           69.0                9.0 +/-    0.50       9.6 +/-    0.50  0.020 / 0.020
G12     188.9          44.9               10.7 +/-    0.63      14.4 +/-    0.63  0.110 / 0.390
G20     204.1          46.9               10.3 +/-    0.55      13.6 +/-    0.55  0.130 / 0.370
G21     264.4          14.5                4.4 +/-    1.94      11.0 +/-    1.94  0.060 / 0.040
G25     253.6          57.4                7.7 +/-    1.92       8.9 +/-    1.92  0.050 / 0.050
G29     325.3          50.0                6.0 +/-    0.94       7.5 +/-    0.94  0.040 / 0.040