PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-12:57:40
G01     77.3           33.2                4.8 +/-    1.50       7.9 +/-    1.50  0.030 / 0.030
G07     134.0          35.8                5.5 +/-    0.73       8.6 +/-    0.73  0.030 / 0.030
G11     56.9           33.2                4.0 +/-    1.10       6.6 +/-    1.10  0.040 / 0.070
G13     281.1          38.0                3.5 +/-    1.47       5.2 +/-    1.47  0.040 / 0.080
G15     310.2          11.8                0.9 +/-    1.84       2.5 +/-    1.84  0.070 / 0.130
G17     225.0          65.8                6.6 +/-    0.72       7.2 +/-    0.72  0.090 / 0.100
G18     53.0           20.2                5.0 +/-    2.07      11.0 +/-    2.07  0.060 / 0.130
G19     220.4          33.4                4.3 +/-    1.21       7.0 +/-    1.21  0.080 / 0.100
G28     9.2            60.5                3.4 +/-    0.61       3.8 +/-    0.61  0.080 / 0.240
G30     128.2          68.9                4.5 +/-    0.85       4.8 +/-    0.85  0.090 / 0.270