PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-15:57:40
G01     63.4           31.3                9.3 +/-    1.02      15.9 +/-    1.02  0.060 / 0.140
G06     180.8          12.5               14.0 +/-    2.47      37.0 +/-    2.47  0.060 / 0.140
G07     140.4          21.9                9.8 +/-    0.52      20.5 +/-    0.52  0.040 / 0.050
G11     48.9           23.3                7.1 +/-    1.27      14.4 +/-    1.27  0.030 / 0.050
G13     268.8          35.8               11.9 +/-    1.85      18.6 +/-    1.85  0.030 / 0.040
G15     300.4          14.9                7.7 +/-    3.15      19.1 +/-    3.15  0.030 / 0.040
G17     252.9          76.7               11.1 +/-    0.61      11.4 +/-    0.61  0.060 / 0.100
G19     229.8          49.9               13.4 +/-    1.14      16.9 +/-    1.14  0.060 / 0.100
G28     30.4           57.5                8.8 +/-    0.66      10.3 +/-    0.66  0.070 / 0.130
G30     140.7          58.2               11.2 +/-    0.68      12.9 +/-    0.68  0.040 / 0.120