PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-17:12:50
G01     120.5          16.9               13.6 +/-    1.13      32.4 +/-    1.13  0.040 / 0.080
G07     75.6           67.6               14.0 +/-    0.59      15.0 +/-    0.59  0.040 / 0.080
G08     46.3           34.6               12.5 +/-    0.61      20.1 +/-    0.61  0.020 / 0.040
G09     177.1          27.5               15.0 +/-    2.01      27.8 +/-    2.01  0.020 / 0.040
G11     109.7          39.3               14.4 +/-    0.82      21.3 +/-    0.82  0.030 / 0.040
G13     318.4          18.1               13.9 +/-    1.54      32.0 +/-    1.54  0.030 / 0.040
G17     202.1          20.6               15.6 +/-    0.57      33.7 +/-    0.57  0.040 / 0.060
G18     96.2           20.2               13.2 +/-    1.01      28.8 +/-    1.01  0.040 / 0.050
G28     290.1          56.8               15.3 +/-    0.72      17.9 +/-    0.72  0.060 / 0.180
G30     345.1          67.7               14.0 +/-    0.50      15.0 +/-    0.50  0.060 / 0.160