PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-14:27:50
G10     285.6          47.8                3.1 +/-    1.33       4.0 +/-    1.33  0.040 / 0.030
G15     48.6           36.6                1.8 +/-    0.45       2.7 +/-    0.45  0.040 / 0.040
G20     331.5          65.0                2.5 +/-    0.98       2.7 +/-    0.98  0.080 / 0.160
G21     75.3           74.8                4.6 +/-    0.56       4.8 +/-    0.56  0.080 / 0.210
G24     102.6          22.6                7.1 +/-    1.62      14.7 +/-    1.62  0.040 / 0.050
G27     310.9          27.5                3.8 +/-    1.88       7.1 +/-    1.88  0.040 / 0.070
G29     167.3          13.9                7.9 +/-    1.19      20.1 +/-    1.19  0.100 / 0.270
G32     207.7          22.1                5.2 +/-    1.95      10.9 +/-    1.95  0.080 / 0.110