PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-05:57:50
G01     81.1           33.1                4.3 +/-    1.20       7.0 +/-    1.20  0.030 / 0.040
G07     131.8          38.2                8.7 +/-    0.70      13.0 +/-    0.70  0.030 / 0.040
G11     61.3           36.1                5.4 +/-    1.04       8.5 +/-    1.04  0.050 / 0.040
G13     286.9          36.9                5.6 +/-    1.29       8.7 +/-    1.29  0.060 / 0.050
G15     309.4          13.4                2.5 +/-    4.02       6.4 +/-    4.02  0.110 / 0.180
G17     221.6          62.2                7.6 +/-    1.41       8.5 +/-    1.41  0.090 / 0.190
G19     218.5          35.4                7.0 +/-    1.28      11.1 +/-    1.28  0.040 / 0.050
G28     5.3            60.7                3.0 +/-    0.89       3.4 +/-    0.89  0.050 / 0.060
G30     123.4          68.2                7.3 +/-    0.55       7.8 +/-    0.55  0.050 / 0.080