PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-13:57:40
G01     123.9          14.0                8.3 +/-    2.73      21.2 +/-    2.73  0.120 / 0.370
G07     71.0           66.3                8.6 +/-    0.36       9.3 +/-    0.36  0.100 / 0.370
G08     47.4           34.8                7.3 +/-    0.75      11.6 +/-    0.75  0.030 / 0.050
G09     176.4          30.9                8.4 +/-    1.69      14.4 +/-    1.69  0.030 / 0.050
G11     110.9          35.8                9.4 +/-    0.95      14.8 +/-    0.95  0.030 / 0.040
G13     320.9          12.8                6.4 +/-    3.25      16.8 +/-    3.25  0.040 / 0.040
G17     199.7          20.7                9.1 +/-    1.92      19.6 +/-    1.92  0.080 / 0.170
G28     282.4          54.6                9.4 +/-    0.75      11.2 +/-    0.75  0.100 / 0.140
G30     334.3          61.3                8.1 +/-    0.82       9.1 +/-    0.82  0.150 / 0.330