PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/15-12:12:50
G01     77.1           32.6                2.6 +/-    1.22       4.3 +/-    1.22  0.030 / 0.030
G07     133.1          34.1                5.2 +/-    0.99       8.4 +/-    0.99  0.030 / 0.030
G11     58.7           36.0                4.0 +/-    1.00       6.2 +/-    1.00  0.040 / 0.060
G13     281.5          38.9                9.0 +/-    1.40      13.3 +/-    1.40  0.060 / 0.070
G15     308.4          13.3                2.3 +/-    2.31       6.1 +/-    2.31  0.070 / 0.060
G17     222.2          59.0                5.3 +/-    1.80       6.1 +/-    1.80  0.050 / 0.050
G18     53.6           20.7                4.1 +/-    3.28       8.8 +/-    3.28  0.100 / 0.120
G19     218.8          37.8                4.9 +/-    1.57       7.4 +/-    1.57  0.120 / 0.130
G28     353.7          61.5                5.6 +/-    0.72       6.3 +/-    0.72  0.180 / 0.180
G30     127.5          68.3                5.9 +/-    0.65       6.3 +/-    0.65  0.150 / 0.180