PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-15:28:00
G01     72.9           32.8                8.5 +/-    1.43      14.1 +/-    1.43  0.030 / 0.040
G07     136.0          29.4                8.4 +/-    1.43      14.9 +/-    1.43  0.030 / 0.040
G11     53.9           29.2                5.5 +/-    0.77       9.8 +/-    0.77  0.030 / 0.040
G13     279.3          37.0                9.7 +/-    0.57      14.9 +/-    0.57  0.040 / 0.040
G15     307.4          13.3                7.5 +/-    1.79      19.4 +/-    1.79  0.060 / 0.080
G17     231.1          70.0                9.7 +/-    0.89      10.3 +/-    0.89  0.080 / 0.090
G19     222.8          42.2               10.5 +/-    0.95      14.7 +/-    0.95  0.070 / 0.150
G28     16.1           59.6                8.9 +/-    0.62      10.1 +/-    0.62  0.060 / 0.120
G30     131.7          66.3                9.0 +/-    0.58       9.8 +/-    0.58  0.080 / 0.110