PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-13:12:50
G01     73.4           33.1                6.7 +/-    0.66      11.0 +/-    0.66  0.040 / 0.040
G07     136.1          32.9                6.6 +/-    1.00      10.9 +/-    1.00  0.030 / 0.040
G11     54.5           31.2                5.9 +/-    1.14      10.0 +/-    1.14  0.070 / 0.090
G13     277.0          37.9                5.8 +/-    1.23       8.7 +/-    1.23  0.070 / 0.090
G15     307.5          12.8                2.4 +/-    1.84       6.3 +/-    1.84  0.060 / 0.070
G17     229.9          68.6                4.8 +/-    0.68       5.1 +/-    0.68  0.070 / 0.070
G18     50.3           18.8                5.4 +/-    1.20      12.2 +/-    1.20  0.080 / 0.110
G19     222.4          36.4                7.1 +/-    1.03      11.0 +/-    1.03  0.090 / 0.110
G28     15.0           59.9                4.6 +/-    0.61       5.2 +/-    0.61  0.070 / 0.180
G30     132.8          65.8                6.1 +/-    0.79       6.6 +/-    0.79  0.070 / 0.180