PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-07:43:10
G02     60.7           30.8                4.2 +/-    0.64       7.3 +/-    0.64  0.020 / 0.020
G05     57.3           59.9                3.6 +/-    0.59       4.1 +/-    0.59  0.030 / 0.030
G12     186.1          33.9                6.4 +/-    1.81      10.4 +/-    1.81  0.060 / 0.090
G13     129.1          15.0                5.7 +/-    2.36      14.2 +/-    2.36  0.050 / 0.120
G15     162.7          12.6                5.9 +/-    4.49      15.5 +/-    4.49  0.210 / 0.240
G20     210.8          53.5                6.0 +/-    1.01       7.3 +/-    1.01  0.090 / 0.190
G21     271.7          18.7                4.0 +/-    2.46       9.0 +/-    2.46  0.040 / 0.050
G25     238.5          52.1                5.4 +/-    2.28       6.7 +/-    2.28  0.040 / 0.060
G29     329.1          55.5                3.7 +/-    0.40       4.4 +/-    0.40  0.260 / 0.390