PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/15-12:27:50
G01     102.4          27.8                4.8 +/-    1.03       8.9 +/-    1.03  0.020 / 0.020
G07     113.5          54.6                7.0 +/-    0.86       8.3 +/-    0.86  0.030 / 0.030
G08     41.5           14.8                3.8 +/-    1.83       9.5 +/-    1.83  0.030 / 0.040
G11     81.1           42.1                6.1 +/-    2.01       8.6 +/-    2.01  0.030 / 0.040
G13     305.6          31.6                3.1 +/-    1.20       5.2 +/-    1.20  0.120 / 0.140
G17     207.4          43.9                6.5 +/-    0.48       9.0 +/-    0.48  0.060 / 0.100
G18     74.7           24.5                6.7 +/-    0.79      13.3 +/-    0.79  0.080 / 0.120
G19     210.9          14.0                2.9 +/-    1.91       7.4 +/-    1.91  0.080 / 0.120
G28     326.5          61.5                4.6 +/-    0.45       5.2 +/-    0.45  0.070 / 0.130
G30     37.8           79.9                5.5 +/-    0.37       5.5 +/-    0.37  0.080 / 0.130