PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-10:27:50
G01     58.7           29.5                3.0 +/-    0.77       5.3 +/-    0.77  0.050 / 0.040
G07     141.7          20.7                5.4 +/-    0.92      11.7 +/-    0.92  0.030 / 0.050
G11     48.5           25.5                3.8 +/-    0.88       7.4 +/-    0.88  0.050 / 0.130
G13     261.0          36.2                7.2 +/-    1.31      11.1 +/-    1.31  0.070 / 0.160
G15     294.2          16.0                2.2 +/-    2.46       5.3 +/-    2.46  0.030 / 0.030
G17     252.6          74.7                6.7 +/-    0.67       6.9 +/-    0.67  0.020 / 0.040
G18     41.6           12.5                1.8 +/-    1.45       4.8 +/-    1.45  0.060 / 0.120
G19     231.9          52.8                9.4 +/-    0.84      11.5 +/-    0.84  0.050 / 0.130
G28     22.8           59.9                3.9 +/-    0.64       4.4 +/-    0.64  0.040 / 0.050
G30     144.3          54.1                6.9 +/-    1.00       8.3 +/-    1.00  0.040 / 0.070