PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/07-08:27:40
G01     77.1           33.2                4.2 +/-    1.06       6.8 +/-    1.06  0.030 / 0.050
G07     134.0          34.7                7.5 +/-    1.06      12.0 +/-    1.06  0.030 / 0.050
G11     57.8           33.3                3.0 +/-    1.49       4.9 +/-    1.49  0.040 / 0.070
G13     283.2          37.0                5.9 +/-    0.68       9.0 +/-    0.68  0.040 / 0.070
G15     307.2          14.1                2.1 +/-    1.79       5.4 +/-    1.79  0.030 / 0.050
G17     225.7          66.1                8.4 +/-    1.40       9.1 +/-    1.40  0.030 / 0.040
G19     220.5          38.7                7.6 +/-    1.73      11.3 +/-    1.73  0.090 / 0.230
G28     11.2           60.2                3.3 +/-    0.68       3.7 +/-    0.68  0.110 / 0.250
G30     128.0          66.7                5.7 +/-    0.65       6.2 +/-    0.65  0.070 / 0.100