PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-06:12:40
G01     310.8          30.0                5.0 +/-    1.68       8.8 +/-    1.68  0.040 / 0.020
G10     99.9           44.8                4.5 +/-    0.53       6.1 +/-    0.53  0.030 / 0.020
G11     284.9          29.7                7.4 +/-    1.93      13.1 +/-    1.93  0.080 / 0.150
G14     349.4          68.6                4.1 +/-    0.49       4.4 +/-    0.49  0.080 / 0.160
G18     113.1          20.0                5.1 +/-    1.15      11.1 +/-    1.15  0.030 / 0.010
G22     307.8          23.0                4.3 +/-    1.54       8.7 +/-    1.54  0.030 / 0.020
G25     82.8           14.5                6.7 +/-    0.95      16.9 +/-    0.95  0.070 / 0.130
G31     170.1          59.5                8.5 +/-    1.32       9.7 +/-    1.32  0.120 / 0.170
G32     29.5           56.6                1.3 +/-    0.67       1.5 +/-    0.67  0.070 / 0.060