PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-02:58:00
G08     309.4          19.4                6.7 +/-    0.81      15.1 +/-    0.81  0.090 / 0.060
G10     327.2          59.1                7.5 +/-    0.63       8.6 +/-    0.63  0.080 / 0.070
G14     217.4          31.2               10.9 +/-    2.21      18.6 +/-    2.21  0.230 / 0.190
G15     46.4           14.3                5.1 +/-    2.95      12.9 +/-    2.95  0.060 / 0.070
G18     33.2           60.9               10.3 +/-    0.65      11.6 +/-    0.65  0.030 / 0.040
G21     132.2          58.6               10.8 +/-    0.38      12.5 +/-    0.38  0.050 / 0.040
G24     77.3           30.6                7.7 +/-    1.30      13.4 +/-    1.30  0.030 / 0.020
G27     274.8          37.8                9.3 +/-    2.02      14.1 +/-    2.02  0.030 / 0.020
G32     222.3          49.9                8.5 +/-    2.04      10.8 +/-    2.04  0.050 / 0.090