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                4.9 +/-    0.83       8.6 +/-    0.83  0.040 / 0.010
G10     99.9           44.8                5.2 +/-    0.56       7.0 +/-    0.56  0.030 / 0.010
G11     284.9          29.7                7.7 +/-    1.07      13.7 +/-    1.07  0.080 / 0.120
G14     349.4          68.6                3.6 +/-    0.76       3.9 +/-    0.76  0.070 / 0.120
G18     113.1          20.0                5.6 +/-    2.11      12.4 +/-    2.11  0.080 / 0.040
G22     307.8          23.0                5.4 +/-    1.60      11.0 +/-    1.60  0.080 / 0.040
G25     82.8           14.5                7.0 +/-    1.66      17.7 +/-    1.66  0.030 / 0.010
G31     170.1          59.5                6.8 +/-    0.45       7.7 +/-    0.45  0.030 / 0.010
G32     29.5           56.6                3.5 +/-    1.06       4.1 +/-    1.06  0.110 / 0.180