PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-07:42:40
G01     77.1           33.2                4.7 +/-    1.22       7.7 +/-    1.22  0.050 / 0.050
G07     134.0          34.9                8.5 +/-    0.91      13.5 +/-    0.91  0.050 / 0.050
G11     58.0           33.6                5.0 +/-    0.86       8.2 +/-    0.86  0.070 / 0.060
G13     283.1          37.1                6.8 +/-    0.94      10.3 +/-    0.94  0.060 / 0.060
G15     307.1          14.2                2.1 +/-    2.61       5.4 +/-    2.61  0.080 / 0.250
G17     225.6          65.9                8.2 +/-    0.83       8.9 +/-    0.83  0.080 / 0.220
G19     220.5          38.6                6.3 +/-    1.55       9.4 +/-    1.55  0.050 / 0.030
G28     11.2           60.2                4.7 +/-    0.76       5.3 +/-    0.76  0.040 / 0.030
G30     128.1          66.3                8.6 +/-    0.67       9.3 +/-    0.67  0.070 / 0.080