PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-13:27:50
G01     103.0          27.5                5.5 +/-    1.09      10.1 +/-    1.09  0.020 / 0.020
G07     112.6          55.2                6.2 +/-    0.85       7.3 +/-    0.85  0.020 / 0.020
G08     41.6           15.9                4.8 +/-    2.22      11.7 +/-    2.22  0.030 / 0.030
G11     82.4           42.3                5.8 +/-    1.28       8.1 +/-    1.28  0.030 / 0.040
G13     306.2          31.2                5.5 +/-    1.15       9.4 +/-    1.15  0.090 / 0.120
G17     207.3          42.5                6.8 +/-    1.43       9.5 +/-    1.43  0.070 / 0.150
G18     75.6           24.5                6.1 +/-    0.68      12.1 +/-    0.68  0.060 / 0.110
G19     210.6          13.7                2.6 +/-    4.88       6.8 +/-    4.88  0.060 / 0.110
G28     325.4          61.5                4.0 +/-    0.44       4.5 +/-    0.44  0.070 / 0.110
G30     36.7           79.7                4.7 +/-    0.67       4.8 +/-    0.67  0.080 / 0.130