PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/07-08:27:50
G01     77.1           33.2                3.6 +/-    1.74       5.8 +/-    1.74  0.040 / 0.050
G07     134.0          34.7                6.7 +/-    1.18      10.7 +/-    1.18  0.050 / 0.040
G11     57.8           33.3                2.9 +/-    1.32       4.7 +/-    1.32  0.060 / 0.060
G13     283.2          37.0                6.8 +/-    1.00      10.4 +/-    1.00  0.070 / 0.060
G15     307.2          14.1                2.5 +/-    2.87       6.4 +/-    2.87  0.030 / 0.030
G17     225.7          66.1                7.5 +/-    0.88       8.1 +/-    0.88  0.050 / 0.030
G19     220.5          38.7                6.7 +/-    1.18      10.0 +/-    1.18  0.080 / 0.230
G28     11.2           60.2                2.6 +/-    0.63       3.0 +/-    0.63  0.070 / 0.230
G30     128.0          66.7                7.0 +/-    0.69       7.5 +/-    0.69  0.070 / 0.090