PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-05:12:50
G08     266.5          18.6                6.9 +/-    1.87      15.7 +/-    1.87  0.030 / 0.020
G10     57.7           59.6                3.8 +/-    0.42       4.4 +/-    0.42  0.030 / 0.020
G11     310.4          18.9                7.9 +/-    1.36      17.9 +/-    1.36  0.090 / 0.080
G14     267.7          67.2                5.3 +/-    0.88       5.7 +/-    0.88  0.100 / 0.070
G18     89.7           38.7                5.9 +/-    1.10       8.7 +/-    1.10  0.110 / 0.230
G21     154.1          16.4                5.8 +/-    1.46      13.9 +/-    1.46  0.150 / 0.210
G24     40.6           12.1                4.8 +/-    0.85      12.9 +/-    0.85  0.030 / 0.010
G27     231.1          16.1                9.1 +/-    2.59      22.1 +/-    2.59  0.030 / 0.010
G31     178.3          29.6               10.4 +/-    1.65      18.4 +/-    1.65  0.100 / 0.060
G32     332.9          74.5                4.9 +/-    0.91       5.1 +/-    0.91  0.130 / 0.070