PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-08:12:20
G02     52.3           38.1                2.9 +/-    1.80       4.4 +/-    1.80  0.030 / 0.030
G05     78.8           67.4                4.4 +/-    0.53       4.7 +/-    0.53  0.030 / 0.030
G12     188.9          45.7                7.1 +/-    1.46       9.5 +/-    1.46  0.300 / 0.410
G20     205.6          42.7                5.8 +/-    1.10       8.1 +/-    1.10  0.230 / 0.410
G21     263.4          12.5                4.1 +/-    7.90      10.9 +/-    7.90  0.030 / 0.050
G25     257.7          57.3                5.8 +/-    2.14       6.7 +/-    2.14  0.040 / 0.050
G29     322.3          46.1                3.8 +/-    0.64       5.0 +/-    0.64  0.030 / 0.050