PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/16-14:27:50
G01     103.7          27.2               10.1 +/-    1.08      18.7 +/-    1.08  0.030 / 0.020
G07     111.7          55.8               11.8 +/-    0.43      14.0 +/-    0.43  0.020 / 0.020
G08     41.7           17.1                8.3 +/-    2.58      19.7 +/-    2.58  0.040 / 0.040
G11     83.7           42.5               11.7 +/-    0.70      16.3 +/-    0.70  0.030 / 0.040
G13     306.8          30.7                9.9 +/-    1.25      17.0 +/-    1.25  0.080 / 0.120
G17     207.3          41.1               10.9 +/-    0.47      15.6 +/-    0.47  0.060 / 0.130
G18     76.5           24.5               11.4 +/-    3.00      22.5 +/-    3.00  0.090 / 0.130
G19     210.4          13.5                1.1 +/-   12.43       2.9 +/-   12.43  0.100 / 0.140
G28     324.3          61.4                9.2 +/-    0.74      10.3 +/-    0.74  0.060 / 0.090
G30     35.6           79.4               10.9 +/-    1.09      11.1 +/-    1.09  0.060 / 0.110