PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-19:27:40
G10     248.8          25.6                9.7 +/-    0.92      18.8 +/-    0.92  0.160 / 0.720
G13     55.3           30.7               10.4 +/-    0.92      18.0 +/-    0.92  0.180 / 0.660
G15     99.3           59.7               11.2 +/-    0.54      12.7 +/-    0.54  0.050 / 0.060
G16     297.3          15.7                2.9 +/-    2.02       7.0 +/-    2.02  0.040 / 0.060
G20     267.1          49.5                8.8 +/-    0.63      11.1 +/-    0.63  0.050 / 0.180
G21     331.9          59.0                9.3 +/-    0.64      10.7 +/-    0.64  0.050 / 0.140
G26     269.9          16.3                9.5 +/-    1.75      23.0 +/-    1.75  0.030 / 0.050
G29     164.0          52.7               11.7 +/-    0.87      14.2 +/-    0.87  0.030 / 0.040