PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-10:27:40
G01     71.7           33.0                4.3 +/-    1.06       7.1 +/-    1.06  0.030 / 0.040
G07     136.9          30.9                6.2 +/-    1.05      10.7 +/-    1.05  0.030 / 0.030
G11     53.3           30.2                2.8 +/-    0.58       5.0 +/-    0.58  0.050 / 0.070
G13     275.0          37.9                5.3 +/-    1.39       8.0 +/-    1.39  0.040 / 0.080
G15     307.3          12.6                1.4 +/-    1.14       3.7 +/-    1.14  0.050 / 0.110
G17     232.7          70.4                5.8 +/-    0.68       6.1 +/-    0.68  0.050 / 0.110
G18     48.4           17.6                1.1 +/-    0.59       2.7 +/-    0.59  0.090 / 0.200
G19     223.3          37.0                5.6 +/-    1.83       8.6 +/-    1.83  0.100 / 0.200
G28     16.2           59.8                4.3 +/-    1.00       4.9 +/-    1.00  0.070 / 0.150
G30     134.8          64.4                5.3 +/-    1.33       5.8 +/-    1.33  0.070 / 0.140