PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-19:27:50
G01     320.2          14.2                8.4 +/-    1.26      21.4 +/-    1.26  0.180 / 0.300
G08     261.5          15.3               10.2 +/-    2.10      25.2 +/-    2.10  0.270 / 0.300
G10     71.8           56.1                8.4 +/-    0.43       9.9 +/-    0.43  0.080 / 0.070
G11     307.4          20.5                8.3 +/-    1.50      18.1 +/-    1.50  0.060 / 0.080
G14     284.0          69.4                9.3 +/-    0.44       9.9 +/-    0.44  0.030 / 0.020
G18     98.6           30.6                7.7 +/-    1.87      13.4 +/-    1.87  0.030 / 0.020
G27     226.0          11.2               11.2 +/-    1.01      30.3 +/-    1.01  0.040 / 0.030
G31     178.5          35.6               11.5 +/-    0.86      18.0 +/-    0.86  0.040 / 0.040
G32     354.7          70.9                7.8 +/-    0.50       8.3 +/-    0.50  0.150 / 0.260