PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-11:28:00
G02     33.7           55.4                4.0 +/-    0.95       4.7 +/-    0.95  0.030 / 0.020
G05     142.7          60.5                4.7 +/-    0.30       5.3 +/-    0.30  0.030 / 0.020
G06     51.3           22.1                3.2 +/-    2.92       6.8 +/-    2.92  0.280 / 0.220
G12     206.5          70.6                4.8 +/-    0.51       5.0 +/-    0.51  0.430 / 0.240
G19     99.3           9.8                 6.7 +/-    1.75      18.8 +/-    1.75  0.030 / 0.020
G20     199.4          22.4                3.5 +/-    1.77       7.3 +/-    1.77  0.030 / 0.020
G25     299.2          52.5                4.1 +/-    2.00       5.1 +/-    2.00  0.030 / 0.040
G29     308.1          30.2                3.5 +/-    1.76       6.1 +/-    1.76  0.070 / 0.050