PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-12:28:10
G01     75.2           33.2                3.6 +/-    1.17       5.9 +/-    1.17  0.030 / 0.030
G07     135.1          34.2                4.5 +/-    1.26       7.3 +/-    1.26  0.030 / 0.040
G11     55.4           32.0                1.8 +/-    0.99       3.0 +/-    0.99  0.040 / 0.080
G13     278.8          38.0                2.5 +/-    2.00       3.7 +/-    2.00  0.040 / 0.080
G15     309.0          12.2                1.2 +/-    2.12       3.2 +/-    2.12  0.060 / 0.100
G17     227.6          67.8                1.6 +/-    1.17       1.7 +/-    1.17  0.050 / 0.100
G18     51.5           19.4                3.5 +/-    1.04       7.8 +/-    1.04  0.070 / 0.210
G19     221.4          34.8                2.4 +/-    0.98       3.8 +/-    0.98  0.080 / 0.240
G28     12.3           60.2                2.0 +/-    0.61       2.3 +/-    0.61  0.050 / 0.110
G30     130.8          67.5                2.3 +/-    0.56       2.4 +/-    0.56  0.060 / 0.130