PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-15:12:40
G01     96.8           29.7                8.7 +/-    0.72      15.4 +/-    0.72  0.050 / 0.150
G07     120.0          47.0                8.1 +/-    1.33      10.6 +/-    1.33  0.050 / 0.150
G08     41.8           10.8                8.8 +/-    1.23      24.1 +/-    1.23  0.040 / 0.030
G11     73.8           39.1                8.6 +/-    0.78      12.7 +/-    0.78  0.030 / 0.030
G13     302.9          32.3                8.5 +/-    1.08      14.3 +/-    1.08  0.040 / 0.080
G17     209.9          49.9               10.9 +/-    1.20      13.8 +/-    1.20  0.040 / 0.090
G19     211.8          23.2                9.8 +/-    1.93      19.9 +/-    1.93  0.040 / 0.050
G28     336.8          61.6                7.4 +/-    0.52       8.3 +/-    0.52  0.050 / 0.050
G30     61.0           80.2                7.6 +/-    0.74       7.7 +/-    0.74  0.040 / 0.070