PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-13:27:40
G01     64.9           31.7                7.1 +/-    0.83      12.1 +/-    0.83  0.080 / 0.240
G06     181.6          10.7              -12.4 +/-   32.57     -34.0 +/-   32.57  0.070 / 0.190
G07     139.9          23.9                6.6 +/-    1.70      13.1 +/-    1.70  0.030 / 0.030
G11     49.9           24.9                6.0 +/-    1.37      11.8 +/-    1.37  0.030 / 0.030
G13     270.9          36.0                6.7 +/-    1.26      10.4 +/-    1.26  0.090 / 0.120
G15     300.1          15.4                2.0 +/-    1.77       4.9 +/-    1.77  0.060 / 0.120
G17     248.4          75.8                7.1 +/-    0.39       7.3 +/-    0.39  0.040 / 0.070
G19     228.6          48.6                7.8 +/-    2.25      10.0 +/-    2.25  0.040 / 0.070
G28     28.6           57.8                6.9 +/-    1.80       8.0 +/-    1.80  0.020 / 0.020
G30     139.6          58.8                7.5 +/-    0.43       8.6 +/-    0.43  0.020 / 0.020