PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-10:58:10
G01     84.1           32.7                2.9 +/-    1.51       4.8 +/-    1.51  0.060 / 0.090
G07     129.8          39.1                8.1 +/-    0.72      12.0 +/-    0.72  0.110 / 0.120
G11     62.4           35.8                6.1 +/-    1.10       9.5 +/-    1.10  0.050 / 0.050
G13     290.9          36.1                6.9 +/-    2.32      10.7 +/-    2.32  0.060 / 0.070
G15     312.7          11.6                0.4 +/-    4.48       1.0 +/-    4.48  0.030 / 0.020
G17     218.7          61.1                7.8 +/-    1.91       8.8 +/-    1.91  0.030 / 0.030
G19     217.0          33.4                8.3 +/-    1.21      13.6 +/-    1.21  0.200 / 0.330
G28     359.8          61.1                4.6 +/-    0.80       5.2 +/-    0.80  0.140 / 0.260
G30     115.6          73.2                5.4 +/-    0.64       5.6 +/-    0.64  0.040 / 0.040