PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-11:28:00
G01     81.5           32.9                3.4 +/-    1.48       5.6 +/-    1.48  0.060 / 0.080
G07     131.4          37.1                6.1 +/-    0.58       9.3 +/-    0.58  0.060 / 0.080
G11     60.4           34.5                4.4 +/-    0.82       7.0 +/-    0.82  0.050 / 0.060
G13     288.4          36.4                5.5 +/-    1.74       8.5 +/-    1.74  0.040 / 0.060
G15     311.2          12.2                2.7 +/-    1.31       7.3 +/-    1.31  0.130 / 0.190
G17     220.9          63.2                6.0 +/-    1.27       6.6 +/-    1.27  0.190 / 0.190
G19     218.2          35.4                5.0 +/-    1.50       7.9 +/-    1.50  0.030 / 0.020
G28     3.7            60.8                3.0 +/-    0.64       3.4 +/-    0.64  0.030 / 0.030
G30     120.3          71.6                4.8 +/-    0.52       5.0 +/-    0.52  0.050 / 0.030