PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/24-13:58:00
G01     102.4          27.8                9.4 +/-    1.09      17.2 +/-    1.09  0.040 / 0.030
G07     113.5          54.7                8.5 +/-    0.26      10.2 +/-    0.26  0.020 / 0.030
G08     41.6           15.7                6.2 +/-    1.13      15.2 +/-    1.13  0.060 / 0.120
G11     81.7           42.3                7.8 +/-    0.64      10.9 +/-    0.64  0.080 / 0.130
G13     305.6          31.5                7.4 +/-    1.67      12.6 +/-    1.67  0.030 / 0.060
G17     207.7          42.8               10.6 +/-    1.47      14.8 +/-    1.47  0.050 / 0.060
G18     75.0           24.6                7.8 +/-    0.78      15.4 +/-    0.78  0.070 / 0.100
G19     210.8          14.4                3.5 +/-    9.26       8.7 +/-    9.26  0.070 / 0.080
G28     326.8          61.5                6.0 +/-    0.86       6.7 +/-    0.86  0.050 / 0.050
G30     41.5           79.8                7.5 +/-    0.49       7.7 +/-    0.49  0.040 / 0.050